Internal-combustion engines – Engine speed regulator – Idle speed control
Reexamination Certificate
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:
patent: 4399789 (1983-08-01), Yano
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
Flynn ,Thiel, Boutell & Tanis, P.C.
Suzuki Motor Corporation
LandOfFree
Controller for control at engine startup does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controller for control at engine startup, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller for control at engine startup will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3375638