Altitude insensitive automotive engine ingnition timing control

Details Altitude insensitive automotive engine ingnition timing control Altitude insensitive automotive engine ingnition timing control

1977-11-14

1979-03-13

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, 123119A, F02P 504, F02M 2506

Patent

active

041436300

ABSTRACT:
An automotive type engine has an ignition timing control that includes a vacuum controlled servo that is responsive to spark port vacuum changes to provide a first advance increment, and EGR port vacuum providing an additional incremental advance, coupled with a source of air at constant pressure acting on the servo as a reference pressure to render the ignition timing changes insensitive to barometric pressure changes occasioned by changes in altitude of the vehicle in which the timing control servo is installed.

REFERENCES:
patent: 2470366 (1949-05-01), Ostling
patent: 3203411 (1965-08-01), Seidlen
patent: 3561411 (1971-02-01), Vasilescu et al.
patent: 3659501 (1972-05-01), Beard
patent: 3704697 (1972-12-01), Weymann
patent: 3780713 (1973-12-01), Julian
patent: 3915132 (1975-10-01), Thornburgh

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