CATERPILLAR MOTOREN GMBH & CO. KG Patent applications |
Patent application number | Title | Published |
20160084179 | CONTROLLING AN INTERNAL COMBUSTION ENGINE OPERATED ON GASEOUS FUEL - A method for controlling an internal combustion engine operating on at least partly gaseous fuel is disclosed. The method may include providing a desired burn rate profile corresponding to a desired operation of the internal combustion engine. The method may further include selecting first operating parameters such that an operation of the internal combustion engine with a first gas composition produces a first burn rate profile that corresponds to the desired burn rate profile. The method may also include operating the internal combustion engine with the first operating parameters using a second gas composition. The method may include determining that the second burn rate profile differs from the desired burn rate profile. In addition, the method may include adjusting an operating parameter from among the first operating parameters of the internal combustion engine to approach the desired burn rate profile. | 03-24-2016 |
20160006256 | CONTROL SYSTEM AND METHOD FOR GENERATOR SETS - A control system for operating generator sets is disclosed. The control system may have control units to control operation of the generator sets. The control system may also have a data bus connected to the control units. Further, the control system may have load bus segments connected to the generator sets. The control system may also have at least one tie breaker arranged between two load bus segments to selectively connect the two load bus segments in a closed position and isolate the two load bus segments in an opened position. The at least one tie breaker may be connected to at least one of the control units. The at least one control unit may receive a first signal from the at least one tie breaker indicative of a position of the tie breaker and provide the first signal to another control unit via the data bus. | 01-07-2016 |
20160003176 | METHOD OF SUPPLYING FUEL TO ENGINE - A method for supplying fuel to an engine is disclosed. The method may include regulating a gas admission valve disposed between a gaseous fuel line and a cylinder intake port to reduce flow of gaseous fuel to the cylinder. The method may also include closing a shut-off valve disposed between a gaseous fuel reservoir and the gaseous fuel line to restrict flow of gaseous fuel from the gaseous fuel reservoir to the gaseous fuel line. Further, the method may include actuating an inert gas inlet valve disposed between an inert gas reservoir and the gaseous fuel line to supply inert gas to the gaseous fuel line and flush the gaseous fuel in the gaseous fuel line into the cylinder via the gas admission valve. Additionally, the method may include closing the inert gas inlet valve to restrict supply of inert gas to the gaseous fuel line. | 01-07-2016 |
20150361943 | METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - A method for controlling an engine is disclosed. The method may include receiving a pressure data set of a combustion event. The pressure data set may correspond to a temporal development of a cylinder pressure during the combustion event in a cylinder. The method may also include determining using a controller that the received pressure data set indicates an actual ignition timing within a preset ignition timing window. Further, the method may include deriving an actual combustion duration (D | 12-17-2015 |
20150354520 | VALVE FOR FUEL SUPPLY SYSTEM - A valve for a fuel supply of an internal combustion engine is disclosed. The valve may have a valve housing that defines a channel in fluid communication with an inert gas supply line at a first end of the valve housing. The valve housing may also have a first flange disposed at a second end distal to the first end. The valve may have a valve body that selectively allow the channel of the valve housing to communicate with an inner bore of a double-walled connecting element of the fuel supply system. The valve housing may also have a second flange disposed adjacent to the first flange. The first flange and the second flange define a detection gap therebetween. The second flange may have a passage in fluid communication with a detection space of the double-walled connecting element and the detection gap. | 12-10-2015 |
20150330328 | CYLINDER HEAD AND ENGINE BLOCK CONFIGURATION - A single-cylinder cylinder head is disclosed. The cylinder head may have a cylinder head body having a gas system side, a pushrod side opposing the gas system side, a circular cylinder closing face with a central injector opening, a pair of inlet openings, and a pair of outlet openings. The cylinder head may have a central injector recess extending through the cylinder head body to the central injector opening. Further, the cylinder head may have a gas inlet channel system and a gas outlet channel system. The cylinder head may also have a pushrod passage extending through the cylinder head body at the pushrod side. In addition, the cylinder head may have a plurality of cylinder mounting holes extending through the cylinder head body in an outer circumferential region of the single-cylinder cylinder head. The cylinder mounting holes may be non-equidistantly arranged around the central injector recess. | 11-19-2015 |
20150285421 | DOUBLE-WALLED FUEL SUPPLY LINE ELEMENT AND CONNECTING FLANGE FOR THE SAME - A connecting flange for a double-walled fuel supply line configured for use in a fuel supply system of an internal combustion engine is disclosed. The connecting flange may have a mounting surface configured to fixedly arrange an outer line element of the double-walled fuel supply line element around an inner line element of the double-walled fuel supply line element. A tubular hollow space may be provided between the inner line element and the outer line element. The connecting flange may have an end face opposite to the mounting surface. In addition, the connecting flange may have a central bore extending between the mounting surface and the end face. The end face may have a projection or a recess surrounding the central bore. The end face may also have a pair of circumferentially extending grooves formed in a front surface of the projection or in a bottom surface of the recess. | 10-08-2015 |
20150267673 | INTERNAL COMBUSTION ENGINE WITH STARTING AIR SYSTEM - An internal combustion engine includes a cylinder for combusting a mixture of fuel and air therein, and a starting air system configured to provide pressurized starting air to the cylinder and to monitor operability of the starting air system. The starting air system may include a pressurized starting air source, a starting air manifold, a starting air venting valve, and a sensing device. The pressurized starting air source is configured to store pressurized starting air. The starting air manifold is fluidly connected to the pressurized starting air source. The starting air venting valve is fluidly connected to the starting air manifold and configured to vent the starting air system. The sensing device is configured to detect a parameter that measures a condition within the starting air system. | 09-24-2015 |
20150252741 | EVALUATING GASEOUS FUEL ADMISSION VALVE OPERABILITY - A method of evaluating operability of a gaseous fuel admission valve of an internal combustion engine is disclosed. The internal combustion engine includes a plurality of cylinders and at least one gaseous fuel admission valve for each cylinder of the plurality of cylinders. The method includes operating the dual fuel internal combustion engine on liquid fuel. The method further includes supplying gaseous fuel to the gaseous fuel admission valves at a pressure above an intake manifold air pressure thereby setting a differential gas pressure across the gaseous fuel admission valves. The method also includes operating the gaseous fuel admission valves to add gaseous fuel to intake air while operating the dual fuel internal combustion engine primarily on liquid fuel. Further, the method includes measuring combustion process parameters for the cylinders. The method also includes evaluating operability of the gaseous fuel admission valves based on the measured combustion process parameters. | 09-10-2015 |
20150252738 | GAS OR DUAL FUEL ENGINE - A method of operating a gas or dual fuel engine having a plurality of cylinders, includes monitoring a characteristic of each of the plurality of cylinders during operation of the gas or dual fuel engine. The method also includes detecting a pre-ignition condition associated with one or more cylinders of the plurality of cylinders based on the monitored characteristic. The method further includes reducing fuel supply to the one or more cylinders having the pre-ignition condition. The fuel supply to remaining cylinders of the plurality of cylinders is increased, to maintain a constant power output of the gas or dual fuel engine. The method further includes adjusting an amount of air supplied to each of the plurality of cylinders based on the increased amount of fuel supplied to the remaining cylinders, to maintain an air-to-fuel ratio within a desired range. | 09-10-2015 |
20150252737 | ELECTRICAL MONITORING OF GASEOUS FUEL ADMISSION VALVES - A method of evaluating operability of a gaseous fuel admission valve of an internal combustion engine is disclosed. The method includes operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve. The method further includes measuring a sequence of temporal developments of an electrical operation parameter respectively associated with an actuation of the gaseous fuel admission valve. The sequence includes a first temporal development to be evaluated and a plurality of temporal developments preceding the first temporal development. The method also includes evaluating operability of the gaseous fuel admission valve based on the first temporal development of the measured sequence and at least one of the plurality of preceding temporal developments of the measured sequence. | 09-10-2015 |
20150241306 | DETECTING MISFIRING IN A GASEOUS FUEL OPERATED INTERNAL COMBUSTION ENGINE - A method of detecting an incomplete combustion, such as a misfire, in an internal combustion engine operating at least partly on a gaseous fuel, includes: receiving pressure data corresponding to a temporal development of a cylinder pressure during a combustion event within a combustion cycle; deriving from the pressure data a combustion energy value of the combustion; determining that the derived combustion energy value is beyond a predetermined combustion-cycle specific combustion threshold level; and associating the combustion event with an incomplete combustion in the combustion cycle. | 08-27-2015 |
20150226144 | METHOD FOR BALANCING CYLINDERS OF AN INTERNAL COMBUSTION ENGINE - A method for balancing a plurality of cylinders during operation of an internal combustion engine having a plurality of gas admission valves includes operating the internal combustion engine with a first common ignition timing for each of a plurality of cylinders. While operating with the first common ignition timing, a cylinder having an above-average knock level is determined, and an opening duration of the gas admission valve associated with this cylinder is reduced. This is repeated until the knock levels for all cylinders differ from each other by less than a predetermined amount. When the knock levels for all cylinders differ by less than the predetermined amount, the first common ignition timing is advanced to a second ignition timing. | 08-13-2015 |
20150219040 | Cylinder Head with Sensor Sleeve - A cylinder head of an internal combustion engine may include an opening and a sensor sleeve. The opening may extend through the cylinder head. The sensor sleeve may be shrink fitted in the opening. The sensor sleeve may be configured to receive a sensor. The sensor may be mounted within the sensor sleeve through a mounting mechanism. | 08-06-2015 |
20150198117 | GASEOUS FUEL FEEDING SYSTEM - A gaseous fuel feeding system is disclosed. The gaseous fuel feeding system has a first duct line for feeding a first cylinder bank. The first duct line has a first inner volume extending from a first inlet end for receiving gaseous fuel to a first opposing end of the first duct line. The gaseous fuel feeding system also has a second duct line for feeding a second cylinder bank. The second duct line has a second inner volume extending from a second inlet end for receiving gaseous fuel to a second opposing end of the second duct line. The gaseous fuel feeding system also has a duct damping element for damping peak pressure and pressure fluctuations. The duct damping element has at least one duct damping orifice that fluidly connects the first inner volume of the first duct line and the second inner volume of the second duct line. | 07-16-2015 |
20150176454 | COMPACT EXHAUST GAS TREATMENT SYSTEM AND METHOD OF OPERATING THE SAME - Directing exhaust gas around a catalyst may pre-heat the catalyst and may thereby bring the catalyst quickly in its operating temperature range. An exhaust gas treatment system for treating the exhaust gas may include a first flow path, a second flow path, and a control system. The first flow path may include a catalyst. The second flow path may be coaxially arranged in heat exchange relation with respect to the first flow path. The control system may be configured to control the flow of exhaust gas through the first flow path or the second flow path dependent upon the catalyst temperature. | 06-25-2015 |
20150159609 | WEAR RESISTANT INSERT ELEMENT FOR A BAFFLE BODY AND BAFFLE BODY FOR A PLUNGER OPERATED FUEL PUMP - A wear resistant insert element is configured to be inserted into a shaft of a baffle body for a plunger operated fuel pump. The baffle body absorbs the energy of a pressure wave generated during pumping operation of the fuel pump. A wear resistant insert element may be made of ceramic and inserted into the baffle body such that an end surface of the baffle body is configured to absorb the energy of a fuel pressure wave and resist wear. | 06-11-2015 |
20150144763 | DAMPED ENGINE SUPORT - An engine support system may have a support structure for supporting an internal combustion engine unit. The support structure may have a top section with outer mounting sections and a counterweight section. Each outer mounting section may have an upper face and a lower face. A mass of a counterweight may be formed by a mass of the support structure and a mass of a generator. The counterweight may have a mass of at least 80 % of a mass of the internal combustion engine unit. The engine support may also have a plurality of upper resilient mountings and a plurality of lower resilient mountings. The upper resilient mountings may be arranged on the upper faces of outer mounting sections and may support the internal combustion engine unit. The lower resilient mountings may be arranged on the lower faces of the outer mounting sections and may support the support structure. | 05-28-2015 |
20150122231 | METHOD TO DISPERSE LUBRICATION INTO A FUEL SUPPLY FOR A FUEL GAS SYSTEM - A method to deliver natural gas (NG) to an internal combustion engine (ICE) via an fuel gas intake assembly is disclosed. The fuel gas intake assembly includes a gas intake manifold and at least one gas admission valve (GAV). The ICE is in fluid communication with the GAV. The method includes the provision of at least one lubrication introduction device, at least a portion of which is laden with a lubricant. The at least one lubrication introduction device is positioned downstream from the gas intake manifold and upstream from the GAV. A substantially pressurized NG is introduced into the gas intake manifold, which causes passage of the NG through the lubrication introduction device. This causes the NG to entrain lubricant from the lubrication introduction device, introduce the lubricant into the fuel gas intake assembly, and deposit the lubricant, at least partially, into the GAV. | 05-07-2015 |
20150121858 | RADIANT HEAT DISCHARGE ARRANGEMENT - A radiant heat discharge arrangement for use with a internal combustion engine is disclosed. The internal combustion engine may have an outlet manifold. The radiant heat discharge arrangement may have a cover configured to over the outlet manifold with a clearance between the cover and the outlet manifold. The cover may have at least one outlet opening. The radiant heat discharge arrangement may also have an air duct having at least one air inlet fluidly connected to the at least one outlet opening of the cover. The air duct may also have an air outlet. Further, the radiant heat discharge arrangement may have a fan fluidly connected to the air outlet. | 05-07-2015 |
20150114353 | INJECTION NOZZLE - An injection nozzle is disclosed. The injection nozzle may have a sealing face providing a sealed connection to the nozzle holder. The injection nozzle may also have a needle guiding bore. The needle guiding bore may have a nozzle holder section extending through the sealing face. The needle guiding bore may further have an injection side section fluidly connected to an outside of the injection nozzle via a plurality of nozzle spray holes. The needle guiding bore may also have a high pressure fuel chamber disposed between the nozzle holder section and the injection side section. The injection nozzle may also have a high pressure supply bore extending through the sealing face and fluidly and connect an opening in the sealing face with the high pressure fuel chamber via an extension. | 04-30-2015 |
20150107560 | PLUNGER FOR AN INTERNAL COMBUSTION ENGINE FUEL PUMP - A plunger of a fuel pump is disclosed. The plunger may have a cylindrical base configured for axial movement and rotation within a pump barrel. The plunger may also have a fuel amount controlling end. The fuel amount controlling end may have a recessed surface region. The fuel amount controlling end may also have a sealing surface region. Further, the fuel amount controlling end may have a control interface connecting the recessed surface region with the sealing surface section in a radial direction. The transition from the recessed surface region to the control interface may be curved. | 04-23-2015 |
20150059712 | CHARGE AIR GUIDE ELEMENT AND WATER RING ELEMENT FOR INTERNAL COMBUSTION ENGINE - A charge air guide element and a water ring element for an internal combustion engine are configured to supply cooling water to the water ring element via the charge air guide element. A cooling water channel system may be integrated into a wall structure of the charge air guide element and may include at least one opening at the cylinder unit side of the charge air guide element, which opens towards the top side of the charge air guide element, and at least one opening at an access side of the charge air guide element, the access side being opposite to the cylinder unit side. An arrangement of screw guiding holes at the charge air guide element may allow using the charge air guide element for in-line and V-configuration internal combustion engines. | 03-05-2015 |
20150053162 | ETHANOL/CASTOR OIL BASED FUEL CONDITIONING - An ethanol/castor oil treatment system for preparing an ethanol/castor oil based fuel for use as a fuel of an internal combustion engine includes an ethanol tank, an ethanol pump fluidly connected to the ethanol tank and having an ethanol output, a castor oil tank, a castor oil pump fluidly connected to the castor oil tank and having a castor oil output, and a blended fuel line having an inlet end fluidly connected to the ethanol output and the castor oil output. The ethanol pump and the castor oil pump are at least one of mass controlled and volume controlled pumps such that ethanol and castor oil are pumped to the blended fuel line in at least one of an adjustable mass ratio and volume ratio. | 02-26-2015 |
20150047587 | OPERATING INTERNAL COMBUSTION ENGINES - A control system is disclosed for operating an internal combustion engine. The control system includes a control unit configured for providing a part load mode that is optimized for slow operation of the engine at loads up to an upper part load limit in the range from 40% to 75% of a maximum engine load. The control unit is also configured for providing a high load mode for engine loads above the upper part load limit. In the part load mode, at least one inlet valve is closed at a closing angle later than in the high load mode. | 02-19-2015 |
20150041415 | FILTRATION SYSTEM FOR PROVIDING CLEAN FUEL - A filtration system is configured to provide clean fuel to a running combustion engine. The filtration system may be configured to be connected to a main fuel tank for storing contaminated fuel, and to be connected to a fuel supply of a combustion engine. A filtration circuit may include at least one filter, a first auxiliary fuel tank for containing fuel, and a first fuel pump configured to pump the fuel from the first auxiliary fuel tank through the filtration circuit back to the first auxiliary fuel tank. A second auxiliary fuel tank may be connectable to said first auxiliary fuel tank for receiving fuel from the first auxiliary fuel tank via a transfer valve. A control unit may be configured to control the transfer valve such that the first auxiliary tank is fluidly connected to the second auxiliary fuel tank only if fuel of a desired contamination level is contained in the first auxiliary tank. | 02-12-2015 |
20150040849 | OPERATING INTERNAL COMBUSTION ENGINES WITH PYROLYSIS OIL - A fuel recirculating unit ( | 02-12-2015 |
20150034042 | CONTROL SYSTEM AND METHOD FOR DUAL FUEL ENGINES - Control systems comprising electronic control modules ( | 02-05-2015 |
20150034035 | ETHANOL-BASED FUEL AND USE THEREOF - An ethanol-based fuel is disclosed that includes 40 to 90% by volume ethanol and 60 to 10% by volume castor oil. The fuel may also include one or more additives in a total amount of up to 10 wt. % of the total weight of the ethanol and castor oil. The ethanol-based fuel may be used for operating an internal combustion engine, and may be used as a switch-over fuel, in between using different fuels that are incompatible with each other. | 02-05-2015 |
20150027385 | OPERATING A POWER PLANT WITH PYROLYSIS OIL BASED FUEL - A power plant may include a power house, a tank farm, and a fuel treatment building. The power house may include an internal combustion engine adapted to be operated with pyrolysis oil based fuels. The power house may further include a conditioning and circulating system with a conditioning unit and a fuel recirculating unit, forming a fuel recirculating cycle together with an engine fuel system. The tank farm may include tanks for pyrolysis oil based fuels, a switching fuel or its components, and crude oil based fuels. The power plant may also include a first switching unit and a second switching unit to release fuel mixes from the fuel recirculating cycle. The power plant may allow switching fuels while continuously operating the internal combustion engine with various fuels. | 01-29-2015 |
20140305408 | CYLINDER HEAD WITH FUEL GUIDING PORTION - A cylinder head for an internal combustion engine is configured to be operated with fuel, such as gaseous or liquid fuel, to provide a more complete combustion of the fuel/air mixture. The cylinder head has at least one fuel guiding section, which includes a fuel inlet valve casing for accommodating a fuel inlet valve configured to control a fuel flow rate, a fuel/air mixing chamber for mixing the fuel with air, and a fuel guiding portion connecting the fuel inlet valve casing to the fuel/air mixture chamber. The fuel guiding portion is integrally formed with the cylinder head and defines at least a first fuel feeding passage and at least a second fuel feeding passage. The first fuel feeding passage and the second fuel feeding passage extend from the fuel inlet valve casing to the fuel/air mixing chamber. | 10-16-2014 |
20140283788 | FUEL SYSTEM WITH LEAKAGE DETECTION MEANS - A method is provided for detecting a leakage in a fuel supply system of an internal combustion engine. The fuel supply system includes a fuel line system with fuel line sections and a pressure monitoring system with monitoring segments, a set of valves, and a pressure sensor. The method includes detecting a leakage between the fuel line sections and the pressure monitoring system when the set of valves are opened to fluidly connect the monitoring segments. The method also includes performing at least two pressure measurements for at least two selected sets of neighboring monitoring segments for providing pressure behaviour information for the selected sets of neighboring monitoring segments. The method further includes comparing the pressure behaviour information of the selected sets of neighboring monitoring segments, and identifying a leaking monitoring segment based on the comparison. | 09-25-2014 |
20140196603 | CERAMIC PLUNGER WITH AT LEAST ONE CONTROL ELEMENT - A plunger for axial movement and rotation within a pump barrel of a fuel pump comprises a substantially cylindrically shaped plunger shaft made of a ceramic material, and at least one control element for controlling a rotational angle of the plunger. The at least one control element is attached to the plunger shaft. | 07-17-2014 |
20130226438 | CONTROLLING MULTIFUEL COMMON RAIL ENGINES - A method for controlling an injection process of an engine that is configured to operate with multiple types of fuels is disclosed. The method may comprise the steps of receiving a fuel amount request indicating a requested amount of fuel to be delivered, receiving at least one physical parameter indicating the type of fuel provided to operate the engine, providing a map comprising a control parameter in dependence of the physical parameter, reading the control parameter associated with the received physical parameter, determining an injection parameter for the injection process based on the control parameter and the requested amount of fuel, and operating the engine based on the injection parameter. | 08-29-2013 |
20130199162 | TWO-STAGE TURBOCHARGED ENGINE - A turbocharged internal combustion engine disclosed that may comprise an engine block with a first end side opposing a second end side and a two-stage turbocharged system. The two-stage turbocharged system may comprise a low-pressure turbocharger with a first turbine and a first compressor and a high-pressure turbocharger with a second turbine and a second compressor. A turbine connection may fluidly connect the first turbine and the second turbine and a compressor connection fluidly connects the first compressor and the second compressor. The low-pressure turbocharger is mounted at the first end side of the engine block and the high-pressure turbocharger is mounted at a second end side of the engine block. | 08-08-2013 |
20130087634 | Injection Nozzle System And Ceramic Nozzle Hood - A ceramic nozzle hood used in a fuel injection nozzle system. The ceramic nozzle hood comprises a first member contact face on the inner surface extending essentially in a radial direction with respect to the longitudinal axis and a collar. The collar comprises a second member contact face, which faces away from the injection side, and a mount contact face, which faces towards the injection side. The inner chamber of the ceramic nozzle hood comprises a blind hole section fluidly connected to a remaining section of the inner chamber along the longitudinal axis through the first member contact face and to an outside of the ceramic nozzle hood via a plurality of nozzle spray holes. | 04-11-2013 |
20130000588 | VALVE STEM SEAL FOR A COMBUSTION ENGINE - A valve stem seal ( | 01-03-2013 |
20120304970 | Mixing Pipe for Recirculated Exhaust Gas and Air - The present disclosure refers to a mixing pipe for mixing recirculated exhaust gas and air, preferably supplied by a high pressure compressor, and supplying a mixture of the exhaust gas and the air to a plurality of combustion chambers of an internal combustion engine. The mixing pipe may comprise a first mixing pipe section having a mixing pipe inlet and a mixing pipe outlet. The distance between the mixing pipe inlet and the mixing pipe outlet may have a predetermined length, wherein the predetermined length of the first mixing pipe section is configured to achieve a defined mixing ratio of the exhaust gas and the air at the mixing pipe outlet. | 12-06-2012 |
20110302919 | TURBOCHARGED ENGINE WITH EXHAUST GAS RECYCLING - The present disclosure refers to a turbocharged internal combustion engine with exhaust gas recycling, comprising an intake manifold, an exhaust manifold, a fresh air turbocharger and an exhaust supercharger, wherein the intake manifold is divided by a separating wall into a fresh air passage and an exhaust passage, one of the passages being connected to inlet openings of cylinders of the engine, the fresh air passage being connected to the outlet of the compressor of the fresh air turbocharger, the exhaust passage being connected to the outlet of the compressor of the exhaust supercharger and the separating wall being formed with orifices connecting the two passages. | 12-15-2011 |
20110023830 | SYSTEM AND METHOD FOR PREVENTING OVERHEATING OF A FUEL PUMP - A fuel injection system supplies fuel at high pressure to an internal combustion engine via at least two high-pressure fuel pumps and a high-pressure fuel distribution line. The high-pressure fuel pumps can operate in a first pump mode and a second pump mode, which differ in the amount of fuel that is pumped. A control unit alternately operates the high-pressure fuel pumps such that, during a first time period, at least one of the high-pressure fuel pumps is operated in the first pump mode and all other high-pressure fuel pumps are simultaneously operated in the second pump mode and such that, during a second time period, at least one of the high-pressure fuel pumps, which was operated in the second pump mode during the first time period, is operated in the first pump mode and the remaining high-pressure fuel pumps are simultaneously operated in the second pump mode. | 02-03-2011 |
20100263612 | Device And Method For Controlling Valves - An apparatus for controlling valve displacement of an internal combustion engine comprises a rocker arm having a first arm portion and a second arm portion, said rocker arm being pivotable about a pivot interposed between said first and second arm portions. The apparatus further comprises an actuation arrangement adapted to actuate said first arm portion of said rocker arm and a valve arrangement adapted to be actuated by said second arm portion of said rocker arm. A damper arrangement is pivotably connected to said first arm portion and adapted for damping movement of said rocker arm around said pivot. | 10-21-2010 |