Automatic device for controlling the pressure of the intake air

Details Automatic device for controlling the pressure of the intake air Automatic device for controlling the pressure of the intake air

1977-02-10

1978-12-05

Myhre, Charles J.

Internal-combustion engines

Two-cycle

Rear compression

123 97B, 123103B, 123119F, 261 39A, 261 64B, F02B 7502, F02M 110

Patent

active

041280865

ABSTRACT:
This invention relates to an automatic device for controlling the pressure of the intake air of an internal combustion engine as its operating altitude varies. The device according to the invention comprises first valve means adapted to keep the air pressure downstream of the said valve means substantially constant and equal to the external pressure corresponding to a predetermined altitude, first actuator means which control said first valve means as a function of an operating pressure which varies with the altitude and reaches at said predetermined altitude a value equal to the substantially constant value downstream of the first valve means, and second valve means controlled by second actuator means sensitive to an absolute pressure which is a function of the external atmospheric pressure, said second valve means being able to modulate said operating pressure.

REFERENCES:
patent: 1675678 (1928-07-01), Weismann
patent: 2481259 (1949-09-01), Taylor
patent: 2505292 (1950-04-01), Mallory
patent: 2588136 (1952-03-01), Mallory
patent: 2668697 (1954-02-01), Sager
patent: 2749938 (1956-06-01), Thomas
patent: 2970586 (1961-02-01), Cramer
patent: 3836128 (1974-09-01), Lunsford
patent: 3984503 (1976-10-01), Gistucci

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