Class / Patent application number | Description | Number of patent applications / Date published |
123508000 | Pumping member driven by the internal combustion engine valve operating mechanism | 19 |
20080230036 | Roller actuator for a mechanical fuel pump - A fuel pump actuator comprising a body portion and a contact end fitted to the body portion for actuating a mechanical fuel pump in response to a camshaft lobe. A roller mounted to the body portion is configured to ride on the lobe. The contact end of the actuator engages a plunger of the fuel pump. The body portion of the actuator is preferably a body portion of a conventional hydraulic valve lifter and preferably includes a lash adjuster and is reciprocally disposed in a bore on the engine block. Lubrication of the reciprocating actuator is also similar to the lubrication provided to conventional valve lifters and lash adjusters. The contact end of the actuator is configured to reduce the mass of the actuator. Several styles of the contact end and ways of attaching the contact end to the body portion are provided. | 09-25-2008 |
20080251051 | FUEL PUMP DRIVING DEVICE - A fuel-pump-driving device ( | 10-16-2008 |
20090139494 | DUAL PISTON DIRECT INJECTION FUEL PUMP - A fuel pump for an automotive application includes two separate pumping chambers within each of which a piston is reciprocated in order to pump fuel to an engine for the automobile. The dual cylinder arrangement increases the output capacity of the fuel pump. | 06-04-2009 |
20090151704 | FUEL PUMP SET - A fuel pump set includes a cam shaft with a cam; a bridge contacting the cam shaft; a head cover attaching the bridge to the cam shaft; and a fuel pump, disposed in the bridge and operable by the cam. The bridge may include two supports, each contacting the cam shaft. One support may have a supporting face, with a shape corresponding to the shape of the cam shaft, with the cam shaft disposed therein. The two supports together may define a shape that widens downward. One support may narrow downward. The set may also include a rod extending from the fuel pump to the cam, reciprocated by the cam. The bridge may include a sealing face supported by the head cover, a groove for preventing rotation of the fuel pump, and/or a breather. The head cover may include an opening in which the fuel pump is disposed. | 06-18-2009 |
20090272365 | Cam lobe profile for driving a mechanical fuel pump - In a fuel-pumping system in an internal combustion engine, a mechanical fuel pump roller actuator is slidably disposed to ride on a dedicated tri-lobate camshaft lobe. In prior art camshaft lobes for this purpose, a portion of the lift profile over a certain angle of camshaft rotation imparts a constant velocity, and hence zero acceleration and zero jerk, to the roller actuator. It has been found that such areas of zero acceleration give rise to undesirably high contact stress between the lobe and the roller actuator. In a method in accordance with the present invention, a reference radius of curvature of a reference camshaft lobe lift profile is adjusted such that, between regions of minimum lift and maximum lift, there are no regions imparting zero acceleration to the actuator and maximum contact stress is reduced. | 11-05-2009 |
20100018505 | METHOD AND APPARATUS FOR SUPPORTING STOP-AND-GO ENGINE FUNCTIONALITY - A vehicle includes a direct-start engine and a fuel rail with a threshold fuel pressure, a transmission having a threshold fluid pressure, and a fuel delivery system. The system has a controller, a motor having a shaft, and an integrated pump assembly including a high-pressure (HP) fuel pump and a low-pressure (LP) fluid pump each connected to the shaft. Threshold pressures are maintained during the predetermined engine state, which includes an engine idling and an engine cranking state. A method for providing stop-and-go functionality in a vehicle having a direct-start engine includes detecting a current engine state, rotating a motor shaft to energize a secondary HP fuel pump at a first threshold pressure during engine cranking, and rotating the shaft to energize an LP fluid pump at a second threshold pressure during engine idling and engine cranking. The secondary pumps can also be used when primary pumps are temporarily inoperable. | 01-28-2010 |
20100037864 | OPERATION OF CAMSHAFTS, PARTICULARLY FOR AN INJECTION PUMP FOR DIESEL, HAVING A RUNNING PULLEY DRIVEN IN A LIFTING MANNER - The invention provides for operation of camshafts, particularly for an injection pump for diesel. A camshaft rotates around a longitudinal axis of a camshaft. The camshaft has at least one cam being in cooperation with a pressure roller driven in a lifting manner. The pressure roller rotates on the peripheral surface of the cam. The upward stroke of the pressure roller is a working stroke during which the pressure roller moves away from the longitudinal axis of the camshaft. During a return stroke the pressure roller moves toward the longitudinal axis of the camshaft. The peripheral surface of the cam has a return stroke section and a working stroke section. The peripheral surface of the return stoke section has a greater friction value than the working stroke section. Thus an operation of camshafts for an injection pump for diesel is provided, securing a rotation of the pressure roller around the circumference of the cam within the whole speed range of the camshaft. | 02-18-2010 |
20100037865 | TAPPET ASSEMBLY FOR A HIGH-PRESSURE PUMP AND HIGH-PRESSURE PUMP COMPRISING AT LEAST ONE TAPPET ASSEMBLY - The invention relates to a tappet assembly for a high-pressure pump, especially for the prose of fuel supply, and to a high-pressure pump including such a tappet assembly. The tappet assembly has a hollow cylindrical tappet base into which a roller support is inserted in the direction of the longitudinal axis of the tappet base. A roller is rotatably received in the roller support. The roller support is arranged at a right angle to the rotational axis of the roller with little or no play in the tappet base and in the direction of the rotational axis of the roller with larger play than at a right angle to the rotational axis of the roller in the tappet base. As a result, the roller support can perform a limited tilting motion in the tappet base, thereby allowing the rotational axis of the roller to be aligned in relation to the rotational axis of a driving shaft driving the tappet assembly in a lifting motion and avoiding edge loading of the roller on a cam or avoiding the need for eccentrics on the driving shaft. | 02-18-2010 |
20100101539 | HIGH-PRESSURE PUMP FOR DELIVERING FUEL COMPRISING A TORSION-DECOUPLED COMPRESSION SPRING ELEMENT IN THE PLUNGER UNIT - The invention relates to a high-pressure pump, especially for delivering fuel for a common rail fuel injection system. The pump includes at least one cam drive having a feeler element which can be set moving in direction of a stroke axis by a cam geometry introduced into the camshaft, the stroke movement being transmittable to a plunger unit. The plunger unit and the feeler element are impinged upon with a force by a compression spring element in the direction of the cam geometry and the plunger unit has at least one contact surface which adjoins the compression spring element. The at least one contact surface and/or the surface of the compression spring element adjoining the same has a friction-reduced surface coating to bring about a torsion decoupling of the compression spring element. | 04-29-2010 |
20100126474 | HIGH-PRESSURE FUEL PUMP FOR A FUEL INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a high pressure fuel pump for a fuel injection system of an internal combustion engine, having a pump housing in which is formed a working space, into which fuel can be supplied from a low pressure region of the radial piston pump, the working space being delimited by a pump piston which can be driven, in order to pressurize the fuel, by an external drive, in particular by a camshaft of an internal combustion engine, wherein in order to meter the fuel quantity supplied to the working space, a throttle device having a variable throttle action is arranged on or in the pump housing. | 05-27-2010 |
20100170480 | HIGH-PRESSURE FUEL PUMP WITH ROLLER TAPPET - A radial piston pump with a roller tappet in which the service life of the tappet is increased by delivering fuel to the contact faces between the tappet and the roller by way of a hydraulic connection between the tappet chamber and the engine chamber. | 07-08-2010 |
20100258093 | DIRECT INJECTED FUEL PUMP DIAGNOSTIC SYSTEMS AND METHODS - An engine control system comprises a camshaft, a cam phaser module, a pressure sensor, and an engine control module. The camshaft is operably coupled to a crankshaft of an engine. Rotation of the camshaft operates a fuel pump in driving communication with a cam of the camshaft. The cam phaser module provides hydraulic pressure to change a rotational position of the cam about the camshaft. The pressure sensor determines a cam phaser pressure signal based on a pressure of fluid in the cam phaser module. The engine control module diagnoses a condition of the fuel pump based on the cam phaser pressure signal. | 10-14-2010 |
20110005500 | TIMING TRANSMISSION MECHANISM IN ENGINE - A timing transmission mechanism (T | 01-13-2011 |
20120199103 | High-Pressure Fuel Pump - In a conventional high-pressure fuel pump, the interference fit part between a plunger and a retainer comes loose with time due to environmental factors and this reduces the clearance between the retainer and a tappet more than necessity, resulting in increase in the contact face pressure between the plunger and a cylinder when a side force acts on the plunger, which causes seizure between the plunger and the cylinder. In this invention, a protrusion protruding toward the tappet is provided around the through-hole for press-fitting the plunger, the through-hole provided in the center portion of the retainer. Since the clearance between the retainer and the tappet can sufficiently be kept even if the joint between the retainer and the plunger comes loose, the seizure between the plunger and the cylinder and the breakage of the plunger are less likely to occur even if the side force acts on the retainer. | 08-09-2012 |
20130206112 | FUEL SUPPLY PUMP - A tappet support member includes at least two slide surfaces and at least two press-fitting projections. The at least two slide surfaces, are planar and extend in an axial direction of a plunger. The at least two slide surfaces are substantially parallel to each other and are opposed to each other, and a shoe of a tappet is axially reciprocatably supported by the at least two slide surfaces. Each of the at least two press-fitting projections projects from a corresponding side of the tappet support member that is opposite from a corresponding one of the at least two slide surfaces, and each of the at least two press-fitting projections is press-fitted into a pump housing, which is stationary relative to the tappet. | 08-15-2013 |
20140290626 | ASSEMBLING FUEL PUMP ON ENGINE - A method of assembling a fuel pump on an engine is disclosed. The method includes a timing pin installed between a pump flange of the fuel pump and a flywheel housing of the engine. The pump flange is moved towards the flywheel housing. The timing pin is further removed which is installed between the pump flange and the flywheel housing of the engine. Further, the pump flange is abutted with the flywheel housing of the engine. | 10-02-2014 |
20160084209 | Pump Control Apparatus And Method - A pumping system includes s pump, a mechanical coupling device, and a cam shaft. The pump is effective to transfer fuel into an engine. The mechanical coupling device is coupled to the pump. The cam shaft couples to the mechanical coupling device. The cam shaft has an axis extending there through and rotates about the axis. The rotating of the cam shaft is effective to engage the mechanical coupling device and transfer a mechanical force created by the rotating to the mechanical coupling device. The mechanical coupling device is engaged to allow the mechanical force to be transferred to the fuel pump and activate the fuel pump when fuel is to be moved by the pump. The mechanical coupling device is disengaged to disallow the mechanical force from being transferred to the fuel pump and prevent the operation of the fuel pump. | 03-24-2016 |
20160177902 | FUEL UNIT PUMP AND INTERNAL COMBUSTION ENGINE COMPRISING IT | 06-23-2016 |
20160252062 | Drive System of a High-Pressure Fuel Pump, High-Pressure Fuel Pump Assembly and Internal Combustion Engine | 09-01-2016 |