Method for control of idle rotations of internal combustion engi

Details Method for control of idle rotations of internal combustion engi Method for control of idle rotations of internal combustion engi

1986-05-22

1988-08-02

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

74860, F02D 4116

Patent

active

047608234

ABSTRACT:
An addition correction term is added to a feedback control term when an internal combustion engine is idling, a control valve is under feedback control, and an automatic transmission is in drive range (D range). The addition correction term is calculated by multiplying a predetermined constant value by at least one of several correction coefficients which are based on RPM and temperature of the engine and vehicle speed. A learnt value is calculated based on intake manifold pressure when the internal combustion engine is in idling condition, the control valve is under feedback control, and the automatic transmission is in disengagement condition, for example, neutral range (N range). When the automatic transmission is turned into D range, the existing manifold pressure is detected and the addition correction term is calculated based on the difference between the learnt value and the detected manifold pressure.

REFERENCES:
patent: 3707892 (1973-01-01), Kuroda et al.
patent: 4237833 (1980-12-01), Des Lauriers
patent: 4289100 (1981-09-01), Kinugawa et al.
patent: 4305360 (1981-12-01), Meyer et al.
patent: 4344399 (1982-08-01), Matsumura et al.
patent: 4418665 (1983-12-01), Nagase

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