Rocker arm decoupler for two-cycle engine retarder

Details Rocker arm decoupler for two-cycle engine retarder Rocker arm decoupler for two-cycle engine retarder

1987-12-15

1988-12-27

Koczo, Michael

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123 9016, 123 9012, 123 9041, F02D 906

Patent

active

047933070

ABSTRACT:
The invention is applicable to an internal combustion engine of the four-stroke cycle type equipped with a compression release engine retarder capable of producing one compression release event and one bleeder retarding event in each cylinder during every two revolutions of the engine crankshaft. This is accomplished by a novel articulated rocker arm assembly including a rocker member and a latch member in which the rocker member, engaged by the exhaust pushtube, is disengaged from the latch member, which acts against the crosshead, after a compression release event has occurred, but remains engaged if a compression release event does not occur. When the latch member is disengaged from the rocker member, the exhaust valves are held in a partially open position to produce a bleeder retarding event. A trigger valve acutated by the exhaust pushtube and rocker member vents the reatarder high pressure hydraulic system to initiate the bleeder retarding event.

REFERENCES:
patent: 3220392 (1965-11-01), Cummins
patent: 4399787 (1983-08-01), Cavanagh
patent: 4473047 (1984-09-01), Jakuba et al.
patent: 4485780 (1984-12-01), Price et al.
patent: 4503818 (1985-03-01), Hara et al.
patent: 4572114 (1986-02-01), Sickler
patent: 4592319 (1986-06-01), Meistrick
patent: 4612887 (1986-09-01), Yoshizaki
patent: 4648362 (1987-03-01), Kastlunger

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