Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1988-02-16
1989-04-11
Dolinar, Andrew M.
Internal-combustion engines
Engine speed regulator
Idle speed control
74860, F02D 4116
Patent
active
048195960
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 temperatures 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: 4237833 (1980-12-01), Des Lauriers
patent: 4305360 (1981-12-01), Meyer et al.
patent: 4344399 (1982-08-01), Matsumura et al.
patent: 4418665 (1983-12-01), Nagase
Iwata Takahiro
Kiuchi Takeo
Yasuoka Akimasa
Dolinar Andrew M.
Honda Giken Kogyo Kabushiki Kaisha
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