Patent application number | Description | Published |
20090007867 | Variable valve train for an internal combustion engine - The invention provides a variable valve train for an internal combustion engine, in which attachment and detachment of a rotation drive source can be performed without an affect on a transmission mechanism and environment. The variable train system comprises a variable valve system that is fixed to a cylinder head and implements variable control on valve drive outputs according to displacement that is inputted to a control input member; a rotation drive source that outputs control rotation for setting valve properties from an output shaft; and a transmission mechanism that is located on the side of the variable valve system, receives the control rotation outputted from the output shaft with an input shaft, and transmits the control rotation to the control input member, wherein the rotation drive source is detachably fixed to an engine body; the output shaft of the rotation drive source is coupled to the input shaft by using a coupling that moves the output shaft toward the input shaft and disengageably couples the output shaft to the input shaft; and the coupling transmits the rotation of the output shaft to the input shaft while allowing misalignment between the output shaft and the input shaft. | 01-08-2009 |
20090031973 | Engine equipped with adjustable valve timing mechanism - An engine equipped with an adjustable valve timing mechanism includes: an inlet valve opening term varying mechanism, which is included in the adjustable valve timing mechanism, varying an opening term of an inlet valve; and an inlet valve opening term controller controlling the inlet valve opening term varying mechanism according to a running state of the engine, the inlet valve opening term varying mechanism setting the opening term of the inlet valve to an first inlet term while the engine runs at relatively high load and relatively high speed, the inlet valve opening term varying mechanism also setting the opening term of the inlet valve to a second inlet term, termination timing of the inlet valve opening of which is retarded compared to the termination timing of the inlet valve opening in the first inlet term, while the engine runs at relatively low load and relatively low speed. | 02-05-2009 |
20100000478 | START CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - A start control device of an internal combustion engine, the start control device includes: a starting unit, which cranks the internal combustion engine to start the internal combustion engine while opening and closing an intake valve; a variable valve mechanism, which can change a closing timing of the intake valve; and a control unit, which controls the variable valve mechanism so as to advance the closing timing of the intake valve while the starting unit cranks. | 01-07-2010 |
20100064993 | INTERNAL COMBUSTION ENGINE - An internal combustion engine includes: a variable valve train mechanism, configured to receive a cam displacement of an inlet cam so as to vary a driving output for driving an inlet valve continuously from a maximum valve lift to a minimum valve lift so as to match the driving output with a running condition of the internal combustion engine; and a control part, configured to control the variable valve train mechanism so as to set a valve lift of the inlet valve to a starter valve lift when starting the internal combustion engine in a cold state. The starter valve lift is formed so that a valve opening period of the inlet valve is set to encompass an overall area of an induction stroke period of the internal combustion engine from a top dead center to a bottom dead center of the induction stroke period. | 03-18-2010 |
20100116231 | VARIABLE VALVE GEAR FOR INTERNAL COMBUSTION ENGINE - Disclosed is a variable valve gear comprising a camshaft phase change mechanism, which variably controls a phase of an intake cam with respect to a crankshaft, and a variable valve lift mechanism, which changes an opening timing of an intake valve more than a closing timing and basically continuously varies a lift and an open period of the intake valve. The lift and the open period are set lest the intake valve interfere with a piston of an engine, with the phase controlled to be most advanced by the camshaft phase change mechanism and the lift controlled to be maximal by the variable valve lift mechanism. | 05-13-2010 |
20100116232 | VARIABLE VALVE GEAR FOR INTERNAL COMBUSTION ENGINE - In a variable valve gear for an internal combustion engine provided with a camshaft phase change mechanism for variably controlling opening and closing timings of an intake valve, the camshaft phase change mechanism and a variable valve lift mechanism are controlled so that the closing timing of the intake valve is advanced beyond a predetermined range T | 05-13-2010 |
20100212614 | INTERNAL COMBUSTION ENGINE WITH VARIABLE VALVE GEAR - In an internal combustion engine with a variable valve gear, which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary at least the phase of the second intake cam, the second intake cam is set so that the open period of the second intake valve is longer than that of the first intake valve. | 08-26-2010 |
20100212617 | INTERNAL COMBUSTION ENGINE WITH VARIABLE VALVE GEAR - In an engine with a cam phase change mechanism which is disposed on one end portion of an intake camshaft and variably changes a phase of a drive cam of an intake valve relative to a crankshaft, the cam phase change mechanism is configured so that two vane-type hydraulic actuators of which variable-phase torques produced at the same supplied oil pressure are different are arranged axially relative to the intake camshaft. | 08-26-2010 |
20100212618 | INTERNAL COMBUSTION ENGINE WITH VARIABLE VALVE GEAR - In an engine which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary the phase of the second intake cam, the cam phase change mechanism is controlled so that the opening timing of the second intake valve is advanced ahead of that of the first intake valve in a start mode. | 08-26-2010 |
20100212619 | INTERNAL COMBUSTION ENGINE WITH VARIABLE VALVE GEAR - Each cylinder is provided with a first intake valve and a second intake valve, and a first intake cam for driving the first intake valve and a second intake cam for driving the second intake valve are coaxially pivotally supported on an intake camshaft. A first cam phase change mechanism which varies respective phases of the first and second intake cams relative to a crankshaft of the internal combustion engine is combined with a second cam phase change mechanism which varies a phase of the second intake cam relative to the first intake cam. The second cam phase change mechanism is set to have a variable-phase angular range wider than that of the first cam phase change mechanism. | 08-26-2010 |
20110107987 | VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE - A variable valve device for an internal combustion engine includes a cam phase variable mechanism for varying a phase difference (split) between first and second intake cams. Under predetermined operating conditions of the internal combustion engine, the second intake cam is controlled to take a phase (split) (S | 05-12-2011 |
20110107988 | VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE - In a variable valve device for an internal combustion engine, which has a cam phase variable mechanism including a split variable function, when the operation of the internal combustion engine is in a predetermined extremely low speed and load region, the phase of a second intake cam is controlled to a more advanced position (S | 05-12-2011 |
20110107992 | VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE - A variable valve device for an internal combustion engine includes a first cam phase variable mechanism capable of varying the phases of both first and second intake cams by using operating oil pressure, and a second cam phase variable mechanism having a split change function and capable of varying the phase of the second intake cam relative to that of the first intake cam by using the operating oil pressure. When the engine is operating in a low-speed, low-load region (A) in which the engine rotating speed is lower than a predetermined rotating speed (N | 05-12-2011 |
20110197836 | INTERNAL COMBUSTION ENGINE CONTROL UNIT - A variable valve mechanism varies a lift amount of an inlet valve. A throttle valve is provided upstream of the inlet valve and varies an opening area of an induction passage. An automatic stopper automatically stops the internal combustion engine. A controller can put the internal combustion engine in a first induction control state in which the lift amount of the inlet valve is equal to or smaller than a predetermined amount and the opening of the throttle valve is larger than a predetermined opening with respect to a predetermined running state. The controller can put the internal combustion engine in a second induction control state in which the left amount of the inlet valve is larger than the predetermined amount and the opening of the throttle valve is equal to or smaller than the predetermined opening with respect to the predetermined running state. The automatic stopper automatically stops the internal combustion engine in a case where the lift amount of the inlet valve is equal to or smaller than the predetermined amount, when a stopping condition of the internal combustion engine is met under which a predetermined vehicle state is produced. | 08-18-2011 |
20120042858 | COMBUSTION CHAMBER CONSTRUCTION FOR ENGINE - A combustion chamber construction includes inlet and exhaust side sloping surfaces. The inlet side sloping surface is formed on one side of a pentroof apex portion as a boundary and which has an inlet port. The exhaust side sloping surface is formed on the other side of the pentroof apex portion as the boundary and which has an exhaust port. A flow improving portion is formed between the inlet port and exhaust port. The flow improving portion includes an inlet flow surface which is formed by recessing part of the inlet side sloping surface and an exhaust side guide surface. One end of the exhaust side guide surface is connected to an exhaust surface of the exhaust side sloping surface and the other end is connected to the inlet flow surface. An angle formed by the inlet flow surface and the exhaust side guide surface is smaller than or equal to an angle formed by the exhaust surface and the exhaust side guide surface. | 02-23-2012 |
20120145101 | VARIABLE VALVE DEVICE FOR AN INTERNAL COMBUSTION ENGINE - A variable valve device has a configuration in which a first cam ( | 06-14-2012 |
20120152192 | ENGINE EQUIPPED WITH VARIABLE VALVETRAIN - In an engine equipped with a variable valvetrain including a second cam phase alteration mechanism | 06-21-2012 |
20120160197 | VARIABLE VALVE DEVICE FOR AN INTERNAL COMBUSTION ENGINE - A variable valve device of the invention has a structure in which, as connecting means for connecting a movable cam | 06-28-2012 |
20140290602 | CAM STRUCTURE - A cam structure driving a tappet having a crowning on a top face and connected to a base end section of an intake or exhaust valve of an engine, includes: a camshaft rotating in synchronization with a crankshaft of the engine; a cam lobe mounted on the camshaft, and including: a base cam including: a base circular section having a mounting hole for the camshaft; and a valve lift section having a cut-out section in a tip end portion; and a roller provided in the cut-out section and having a cylindrical section with a constant diameter. A center section in a width direction of the base cam makes contact with the tappet at a position deviated from a center of the top face of the tappet, and the cylindrical section makes contact with the center of the top face of the tappet. | 10-02-2014 |