Combustion changeover control for engine

Details Combustion changeover control for engine Combustion changeover control for engine

1998-12-18

2000-11-07

Wolfe, Willis R.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123305, 12356821, F02M 2507, F02B 1700

Patent

active

061421170

ABSTRACT:
An engine control system for an internal combustion engine comprises a combustion system for changing over a combustion mode from a first mode such as a stratified charge combustion mode to a second mode such as a homogeneous charge combustion mode, and an EGR system for controlling an EGR flow to the engine with an EGR control valve. A controller calculates a delayed target equivalent ratio which varies gradually from a first ratio for the first mode to a second ratio for the second mode, and further calculates a modified target equivalent ratio in consideration of an amount of an EGR gas. The controller determines the combustion changeover timing by monitoring a parameter based on the modified target equivalent ratio to take account of the influence of the EGR gas.

REFERENCES:
patent: 5749334 (1998-05-01), Oda et al.
patent: 5848580 (1998-12-01), Mashiki
patent: 5896839 (1999-04-01), Togai
patent: 5979396 (1999-11-01), Yasuoka
patent: 6006717 (1999-12-01), Suzuki et al.

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