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US 6,634,166 B2Granted
In-cylinder injection type spark-ignition internal combustion engine and method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShigeki Miyashita
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorShigeki Miyashita
Estimating the term…
In an in-cylinder injection spark-ignition internal combustion engine including a plurality of cylinders and a catalyst device disposed in an exhaust system of the engine, a fuel is injected to at least one selected cylinder selected from the plurality of cylinders to be operated, and subsequently the fuel is injected to all cylinders to be operated. At this time, a warm-up controlled variable for the at least one selected cylinder is smaller than the warm-up controlled variable used when all cylinders are operated. In the in-cylinder injection spark-ignition internal combustion engine, the all cylinder operation is started and the warm-up control is started for all cylinders to warm up the catalyst device disposed in the exhaust system of the engine preferably when a fuel injection pressure exceeds a target value.
An in-cylinder injection spark-ignition internal combustion engine comprising a plurality of cylinders, a catalyst device disposed in an exhaust system of the engine and a controller that, at engine start-up, causes fuel to be injected in a first mode for low fuel pressure during start-up to less than all of the plurality of cylinders, and subsequently causes the fuel to be injected in a second mode to all of the plurality of cylinders, wherein the controller sets a variable used during warm-up control of the catalyst device to be smaller during the first mode than during the second mode, and causes a shift from the first mode to the second mode before a completion of the warm-up control of the catalyst device.
A method of controlling fuel injection in an in-cylinder injection spark-ignition internal combustion engine comprising a plurality of cylinders and a catalyst device disposed in an exhaust system of the engine, the method comprising:
Dependencies are inferred from the claim text.