Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Patent
1999-03-03
2000-12-19
Wolfe, Willis R.
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
123301, 123435, 12356814, F02D 4104, F02D 4140, F02M 2507
Patent
active
061615196
ABSTRACT:
In a diesel engine which conducts exhaust gas recirculation and low temperature pre-mixed combustion at a low compression ratio, an ambient temperature at initiation of combustion which is determined by a compression ratio and an intake gas temperature or engine load is determined to be in a low temperature region which is lower than a first target temperature T1 which supports pre-mixed combustion or not. When the ambient temperature at initiation of combustion is determined to be in a region that is lower than a first target temperature T1, a temperature increase control device is operated which increases the temperature of the operational gases in the cylinder so that the temperature at initiation of combustion exceeds a first target temperature. The main fuel injection timing is placed in the range of 5.degree.-20.degree. of the combustion top dead center so that the main combustion temperature is above a fixed value. In this way, low temperature pre-mixed combustion is stabilized at low load at which combustion becomes unstable when compression ratios are low.
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Aiyoshizawa Eiji
Kimura Shuji
Nissan Motor Co,. Ltd.
Wolfe Willis R.
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