Engine retarder slave piston return mechanism

Details Engine retarder slave piston return mechanism Engine retarder slave piston return mechanism

1982-04-28

1984-01-03

Cuchlinski, Jr., William A.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123 9015, 123198F, F02D 3100

Patent

active

044237120

ABSTRACT:
An hydraulic slave piston return mechanism is provided for an engine retarder of the compression relief type. The mechanism senses the position of the slave piston at the time when the engine exhaust valve has been opened. At this point, the hydraulic pressure on the slave piston is equalized by opening a passageway through the slave piston to an accumulator whereupon the engine exhaust valve spring immediately closes the exhaust valve. Thereafter, the accumulator returns the hydraulic fluid to the hydraulic circuit. The mechanism assures that the exhaust valve opened near the end of the compression stroke to produce the desired engine retarding effect is closed prior to the end of the expansion stroke without affecting the retarding horsepower produced by the engine retarder or the normal functioning of the exhaust valve during the exhaust stroke of the engine.

REFERENCES:
patent: 3220392 (1965-11-01), Cummins
patent: 3405699 (1968-10-01), Laas
patent: 3786792 (1974-01-01), Pelizzoni et al.
patent: 3859970 (1975-01-01), Dreisin
patent: 4033304 (1977-07-01), Luria
patent: 4150640 (1979-04-01), Egan
patent: 4271796 (1981-06-01), Sickler et al.
patent: 4384558 (1983-05-01), Johnson

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