Internal-combustion engines – Noncompression
Patent
1977-06-06
1979-03-27
Myhre, Charles J.
Internal-combustion engines
Noncompression
123 32EE, 123119EC, F02B 302, F02B 308, F02M 712
Patent
active
041460006
ABSTRACT:
In an air flow control system including a gas sensor for detecting the concentration of a constituent of the exhaust gases from an internal combustion engine, an air passage for supplying additional air into the intake system or exhaust system of the engine, a by-pass valve for varying the passage area of the additional air passage, and means for controlling the opening and closing of the by-pass valve in accordance with the detection signal from the gas sensor whereby the amount of additional air supplied into the intake system or exhaust system of the engine is controlled in accordance with the concentration of the constituent of the exhaust gases, there is further provided an acceleration/deceleration sensor for detecting acceleration or deceleration of the engine, whereby when a transition from the acceleration or deceleration operating condition to the steady-state operating condition is detected, the opening and closing control of the by-pass valve is accomplished in such a manner that the amount of opening and closing movement of the by-pass valve is gradually decreased. Thus, when the engine comes into the steady-state operation from the transient operation, the rate of change in the opening of the by-pass valve is gradually decreased to reduce variation of the air-fuel ratio upon the transition from the acceleration/deceleration operation to the constant speed operation.
REFERENCES:
patent: 3759232 (1973-09-01), Wahl et al.
patent: 4007718 (1977-02-01), Laprade et al.
patent: 4020813 (1977-05-01), Hattori et al.
patent: 4052968 (1977-10-01), Hattori et al.
patent: 4062337 (1977-12-01), Rivere
patent: 4072137 (1978-02-01), Hattori et al.
patent: 4075835 (1978-02-01), Hattori et al.
Fukuda Tamotsu
Hattori Tadashi
Nakase Takamichi
Takata Akira
Lall P. S.
Myhre Charles J.
Nippon Soken Inc.
Toyota Jidosha Kogyo Kabushiki Kaisha
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