Internal-combustion engines – Combustion chamber means having fuel injection only – Combustible mixture stratification means
Reexamination Certificate
2005-12-13
2005-12-13
Solis, Erick (Department: 3747)
Internal-combustion engines
Combustion chamber means having fuel injection only
Combustible mixture stratification means
C123S299000
Reexamination Certificate
active
06973910
ABSTRACT:
An internal combustion engine includes an in-cylinder injection valve and an intake port injection valve. The engine is operated in a combustion mode that is selected from at least stratified lean combustion and homogeneous combustion. An ECU selects the combustion mode according to the operational state of the engine, and controls the fuel injection valves in a fuel injection mode that corresponds to the selected combustion mode. When a misfire is detected while the engine is operated in the stratified lean combustion or the homogeneous combustion, the ECU switches the fuel injection mode such that the ratio of the amount of fuel injected from the intake port injection valve to the entire amount of fuel supplied into the cylinder is increased. As a result, misfires are suppressed while preventing the fuel economy from deteriorating.
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Kenyon & Kenyon
Solis Erick
Toyota Jidosha & Kabushiki Kaisha
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