| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve torque performance and acceleration performance under a full load operation condition at low engine speed. <P>SOLUTION: A fuel injection quantity control device for a diesel engine is provided with a diesel particulate filter (DPF) compares accelerator request fuel injection quantity tQf in response to accelerator request and air fuel ratio request fuel injection quantity QFL_LMD determined based on target air fuel ratio TAFR in response to an engine operation condition and adopts smaller injection quantity as an actual fuel injection quantity. The target air fuel ratio TAFR is corrected to a value near to air fuel ratio with which maximum torque can be obtained under the full load operation condition at low engine speed. Consequently, fuel can be injected in such a manner that air fuel ratio is kept near to theoretical air fuel ratio under the full load operation condition at low engine speed, and torque performance and acceleration performance can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
