A variable valve device is capable of smoothly switching between a coupling state and a separation state of a plurality of rocker arms. A variable valve device changes a valve lift amount in a cylinder head. The device includes: a camshaft having plural ca...

The invention relates to a method for a coasting operation of a motor vehicle with an internal combustion engine, in particular a commercial vehicle, wherein in coasting operation the internal combustion engine is dragged in unfired operation and with a cl...

The invention relates to a device for supplying compressed air to pneumatic devices in motor vehicles, in particular to braking devices in commercial vehicles, wherein compressed air can be extracted from the combustion chamber of at least one cylinder of ...

The cam follower roller device notably for fuel injection pump of an internal combustion engine, comprises a body 12, a shaft 14 mounted on the body and a roller 16 rotatably mounted on said shaft. At least one of the shaft and the roller is coated with an...

An intake apparatus 10 of an engine 1 includes: a first intake passage 11 supplying fresh air to a cylinder 2; a second intake passage 12 arranged near the first intake passage 11, and supplying fresh air to the cylinder 2; a first intake valve 13 opening ...

A pressure balancing system for an engine (148), comprising an engine valve (155), the head (157) of the engine valve (155) including an outer face (160) adjacent the cylinder (12); a balance piston (159) on the stem (145) of the engine valve (155) and mov...

The engine braking method involves conducting exhaust-gas flow through bypass line to turbine wheel of exhaust-gas turbine, throttling exhaust-gas flow, and generating pressure increase in exhaust gas upstream of throttling device. The position of throttli...

A valve operation control system for an internal combustion engine in which hydraulic pressure applied to a valve operation mode changing mechanism is controlled by hydraulic pressure control means that is formed from a holder mounted on a cylinder head, a...