Ignition or fuel injection control system with auxiliary source

Internal-combustion engines – Starting device

Reexamination Certificate

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Details

C123S179500

Reexamination Certificate

active

06684839

ABSTRACT:

BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention is related to an ignition or fuel injection control system to ensure good ignition performance by avoiding voltage drop at an ignition device or a fuel injection control device due to larger current is drawn by a start-up motor while starting an engine; and more particularly, to one that is comprised of an auxiliary source dedicated for the ignition device or the fuel injection control system and a separation diode to separate the auxiliary source from the battery source for the start-up motor.
(b) Description of the Prior Art
In the prior art, the engine ignition system or the fuel injection control system and start-up motor share a common battery source. However, a significant drop (usually for 25~40%) of the battery source due to larger current is required by the start-up motor. As a result, poor ignition efficiency or slower switching rate of the fuel injection control system makes starting up the engine particularly difficult.
SUMMARY OF THE INVENTION
The primary purpose is to provide an ignition or fuel injection control system with an auxiliary source that is separated from the primary system. To achieve the purpose, an auxiliary source dedicated for the ignition device or the fuel injection control system and a separation diode to separate the auxiliary source from the battery source for the start-up motor are provided to ensure good ignition efficiency by avoiding a sudden drop at an ignition device or a fuel injection control device due to larger current is drawn to the start-up motor while starting an engine.


REFERENCES:
patent: 4847545 (1989-07-01), Reid
patent: 5637978 (1997-06-01), Kellett et al.
patent: 6593722 (2003-07-01), Purdy

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