Internal combustion engine of ignition timing controllable type

Details Internal combustion engine of ignition timing controllable type Internal combustion engine of ignition timing controllable type

1975-10-16

1977-03-01

Cohan, Alan

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02P 510

Patent

active

040096980

ABSTRACT:
Herein disclosed is an internal combustion engine of ignition timing controllable type for use with an automotive vehicle. The internal combustion engine includes, as customary, an intake system including a carburetor having a throttle valve, a distributor, and an ignition timing regulating device connected to the distributor and having a diaphragm chamber to which a control vacuum is supplied. The internal combustion engine further includes a first port from which a carburetor vacuum having relationship to the opening of the throttle valve is taken out, a second port from which an intake vacuum is taken out, and a first direction control valve operable in relationship to the speed of rotation of the internal combustion engine or to the running speed of the automotive vehicle. The first and second ports are selectively connected to the diaphragm chamber of the ignition timing regulating device by way of the first direction control valve, so that during a low speed driving condition of the engine the intake vacuum taken out from the second port may be supplied to the diaphragm chamber to retard the ignition timing, so that during a high speed driving condition of the internal combustion engine a low carburetor vacuum taken out from the first-named port may be supplied to said diaphragm chamber to advance the ignition timing, and so that upon deceleration from a high speed driving condition a high carburetor vacuum taken out from the first port may be supplied to the diaphragm chamber to retard the ignition timing.

REFERENCES:
patent: 3793833 (1974-02-01), van Basshuysen
patent: 3800758 (1974-04-01), Sutherland

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