Fuel injection control system for internal combustion engine of

Details Fuel injection control system for internal combustion engine of Fuel injection control system for internal combustion engine of

1998-10-02

2000-09-05

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Having a particular relationship between injection and...

123299, F02D 4106

Patent

active

061127167

ABSTRACT:
In an internal combustion engine of a cylinder injection type, a fuel injection control system for controlling fuel injection/combustion effected during an expansion stroke or an exhaust stroke of the engine in order to heat a catalyst to a light-on temperature as soon as possible in an engine starting phase while protecting the catalyst against degradation/dissolution and ensuring purification of exhaust gas at an earlier stage regardless of changes in the ambient temperature and the state of a motor vehicle prevailing when the engine is restarted from the cold state or when the engine is restarted after having been stopped in the warmed-up state and additionally proper temperature rise as well as prevention of discharge of unburnt gas. The system includes fuel injection valves (47 to 50) capable of injecting fuel under high pressure directly into combustion chambers (24, 26, 28, 30) of an engine (10), an engine start detecting means for detecting starting of the engine (10), a temperature detecting means (55) for detecting temperature (T.sub.W) of the engine (10), and an engine low-temperature state detecting means (22) for detecting whether or not the engine is at a low temperature by comparing a detected value (T.sub.W) derived from output of the temperature detecting means (55) with a predetermined value stored previously.

REFERENCES:
patent: 4469072 (1984-09-01), Kobayashi et al.
patent: 5482017 (1996-01-01), Brehob et al.

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