Engine-brake assisting system

Details Engine-brake assisting system Engine-brake assisting system

1997-10-10

1999-11-30

Wolfe, Willis R.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

F02D 1304

Patent

active

059923768

ABSTRACT:
In an engine-brake assisting system comprising a hydraulic pressure producing unit, an exhaust valve driving unit and a hydraulic circuit member which are constructed as discrete elements, the hydraulic pressure producing unit produces a desired hydraulic pressure by rotating a camshaft disposed on a cylinder head to drive an engine-brake assisting cam. The generated hydraulic pressure is then supplied to an exhaust cam of the exhaust valve driving unit, which causes exhaust valves to open and close at a timing different from a valve opening and closing timing during a normal operation, thereby giving the engine a large brake force. With this arrangement, the reduction of overall size of the system and consequent reduction of overall height of an engine can be achieved.

REFERENCES:
patent: 3786792 (1974-01-01), Pelizzoni et al.
patent: 5036810 (1991-08-01), Meneely
patent: 5105782 (1992-04-01), Meneely
patent: 5645031 (1997-07-01), Meneely
patent: 5701857 (1997-12-01), Hara
patent: 5803038 (1998-09-01), Ihara et al.
patent: 5809952 (1998-09-01), Ono et al.

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