Ignition timing control device of the negative pressure actuatio

Details Ignition timing control device of the negative pressure actuatio Ignition timing control device of the negative pressure actuatio

1976-08-17

1978-12-12

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

1231465A, 200 31V, F02P 506

Patent

active

041291042

ABSTRACT:
In an ignition timing control device of the negative pressure actuation type having a diaphragm secured to a rod connected to an ignition timing adjusting plate having an ignition signal generating means mounted thereon, the diaphragm being held between two diaphragm cases to define first and second diaphragm chambers therebetween, and a negative pressure introducing port formed in the diaphragm case defining the first diaphragm chamber and communicating with a negative pressure source so as to introduce a negative pressure into the first diaphragm chamber to operate the ignition timing adjusting plate to effect ignition advance or ignition lag, an empty space is formed at the entrance to the diaphragm case defining the first diaphragm chamber for housing therein an electrically operated valve and maintained in communication with the first diaphragm chamber, and the empty space communicates with the negative pressure introducing port through a negative pressure communication opening and with the atmosphere through an atmospheric pressure introducing port, so that communication between the negative pressure communication opening and the empty space is shut off at predetermined engine operating conditions and communication between the atmospheric pressure introducing port and the empty space is shut off at other engine operating conditions by means of the valve.

REFERENCES:
patent: 3521609 (1967-08-01), Kashiwagi et al.
patent: 3650253 (1972-03-01), Cooksey
patent: 3718126 (1973-02-01), Oishi et al.
patent: 3788290 (1974-01-01), Carter et al.
patent: 3895616 (1975-07-01), Steinke
patent: 3978831 (1976-09-01), Yoshikawa

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