Fluidic exhaust valve opening system for an engine compression b

Details Fluidic exhaust valve opening system for an engine compression b Fluidic exhaust valve opening system for an engine compression b

1977-12-20

1979-04-24

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9012, 123198F, 123 9015, F02D 1304

Patent

active

041506405

ABSTRACT:
A compression braking system for an internal combustion engine having at least one working piston including a master piston operated by a fuel injector actuating mechanism and a slave piston fluidically connected with the master piston to open an engine exhaust valve wherein a fluid pressure control valve is provided to operate an exhaust valve opening delay means for delaying the opening of the exhaust valve to prevent the build up of excessive pressure in the fluid circuit between the master and slave pistons. The pressure relief valve is spring biased to sense fluid pressure above a predetermined level within the fluid circuit and to respond by venting fluid from the circuit to prevent thereby the exhaust valve from being opened against a variable closing bias exceeding a predetermined limit. The pressure relief valve has, in one embodiment, adjacent inlet and outlet ports while in a second embodiment the inlet and outlet ports are separated.

REFERENCES:
patent: 3220392 (1965-11-01), Cummins
patent: 3367312 (1968-02-01), Jonsson
patent: 3405699 (1968-10-01), Laas
patent: 3439662 (1969-04-01), Jones
patent: 3547087 (1970-12-01), Siegler
patent: 3786792 (1974-01-01), Pelizzoni et al.
patent: 3859970 (1975-01-01), Dreisin
patent: 3986351 (1976-10-01), Woods
patent: 4033304 (1977-07-01), Luria

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