To automatically perform predetermined open or close of an exhaust valve 2 and to provide high engine brake power, by improving an engine control braking device of a 4-stroke internal piston combustion engine equipped with one intake valve and two exhaust valves 2 and 3 for each cylinder.
A throttle device 10 for operating an engine brake is incorporated in an exhaust gas duct 9 so that the exhaust gas resistant pressure cooperating with a braking device 11 in an engine is formed in exhaust gas dammed up in the upstream of the throttle device. The braking device 11 is disposed in one exhaust valve 2 of the exhaust valves 2 and 3, and the other 3 is controlled conventionally. The braking device 10 has a control piston 30 incorporated in a valve bridge 20 pressed toward the exhaust valve 2 from a control pressure chamber 33 loaded by oil pressure. The control pressure chamber 33 is connected to a permanent pressure oil supply section, and is cut off and pressure-released via a pressure releasing passage 37 in relation to a motion or position of the valve bridge 20.
RAAB GOTTFRIED
LEITENMAYR FRANZ
| JPH08284696A | 1996-10-29 | |||
| JPH03111611A | 1991-05-13 |
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel