Controller for control at engine startup

Details Controller for control at engine startup Controller for control at engine startup

2005-01-18

2005-01-18

Kwon, John T. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Idle speed control

C123S339230, C123S406560

Reexamination Certificate

active

06843225

ABSTRACT:
A control unit for engine startup includes a throttle valve, a bypass air quantity-regulating valve, an ignition coil, a bypass air quantity controller, an ignition timing feedback controller, and a multi-spark controller. The throttle valve is disposed in an intake passage of an engine to control intake air quantity. The bypass air quantity-regulating valve controls the air quantity in a bypass passage that bypasses the throttle valve. The ignition coil permits an ignition plug of a same cylinder of the engine to produce multi-sparking during one cycle. The bypass air quantity controller controls the bypass air quantity-regulating valve such that the engine speed is at a target engine speed. The ignition timing feedback controller performs feedback control for the ignition coil such that the ignition timing of the ignition plug is at a target ignition timing. The multi-spark controller controls the ignition coil such that the ignition plug performs multi-spark as necessary. In operation, the control unit reduces the amount of unused hydrocarbons and improves the drivability at startup of a cold engine.

REFERENCES:
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patent: 4425886 (1984-01-01), Kuroiwa et al.
patent: 4688534 (1987-08-01), Takeda et al.
patent: 5343840 (1994-09-01), Wataya et al.
patent: 5586534 (1996-12-01), Fujimoto
patent: 05-321730 (1993-12-01), None
patent: 10-030480 (1998-02-01), None
patent: 10-047039 (1998-02-01), None
patent: 2000-009010 (2000-01-01), None

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