Internal-combustion engines – Engine speed regulator – Responsive to deceleration mode
Patent
1979-04-16
1980-12-09
Myhre, Charles J.
Internal-combustion engines
Engine speed regulator
Responsive to deceleration mode
123329, 123 97R, 123124R, F02D 104
Patent
active
042378338
ABSTRACT:
A vehicle engine includes throttle stop control apparatus including means effective to store a plurality of induction passage pressure numbers corresponding to specified values of engine speed. Further apparatus measures engine speed and induction passage pressure and compares the induction passage pressure with a control reference number derived from the induction passage pressure reference number corresponding to the measured engine speed. When the throttle is in the idle position and the induction passage pressure signal exceeds the reference, a throttle stop control loop is closed on engine speed to maintain a predetermined engine idle speed. However, when the throttle is in the idle position and the induction passage pressure signal does not exceed the reference, the throttle stop control loop is closed on induction passage pressure to maintain substantially the reference pressure, whereby throttle position during vehicle coastdown is controlled according to a predetermined stored schedule. The control reference number may be shifted between the induction passage pressure number and a higher number as the control is shifted between idle speed and induction passage pressure control to provide hysteresis.
REFERENCES:
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patent: 3287007 (1966-11-01), Schoeppach
patent: 3570460 (1971-03-01), Rabus
patent: 3577962 (1971-05-01), Ojala
patent: 3603298 (1971-09-01), Tadahide et al.
patent: 3645241 (1972-02-01), Huntzinger
patent: 3700996 (1972-10-01), Gutting
patent: 3794003 (1974-02-01), Reddy
patent: 4108127 (1978-08-01), Chapin et al.
General Motors Corporation
Myhre Charles J.
Nelli Raymond A.
Sigler Robert M.
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