Method of reducing hydrocarbon emissions from a cold engine and device and engine for carrying out this method
AssigneePeugeot Citroen Automobiles SA
InventorsFabien Lanteires, Raphael Penet
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Abstract
The invention relates to a method of control of an internal combustion engine comprising at least one electrically controlled inlet valve. To reduce hydrocarbon emissions by the cold engine, the opening of the valve is controlled in two successive phases (32, 34), the first phase (32) corresponding principally with the admission of fuel and the second phase (34) mainly corresponding with the air inlet. The opening of the valve is substantially lower during the first phase than during the second phase in order to pulverize the fuel into fine droplets during the first phase.
Claims14
A device for reducing hydrocarbon emissions produced by a cold internal combustion engine comprising:
- a controller operable to electrically control opening of an inlet valve of said internal combustion engine in two successive phases, a first phase primarily for the inlet of fuel and a second phase primarily for the inlet of air;
- and wherein said controller electrically controls said inlet valve being open substantially lower during said first phase than during said second phase, thereby pulverizing said fuel into fine droplets during said first phase;
- and
- a catalytic system for combusting burnt exhaust gases.
An engine comprising a device for reducing hydrocarbon emissions produced by a cold internal combustion engine comprising:
- a controller for electrically controlling an inlet valve of said internal combustion engine to open in two successive phases, a first phase primarily for the inlet of fuel and a second phase primarily for the inlet of air;
- and wherein said controller further electrically controls said inlet valve being open substantially lower during said first phase than during said second phase, thereby pulverizing said fuel into fine droplets during said first phase comprising means for;
- and
- a catalytic system for combusting burnt exhaust gases.
A method for reducing hydrocarbon emissions produced by a cold internal combustion engine, comprising the steps of:
- opening an electrically controlled inlet valve of said internal combustion engine in two successive phases, a first phase primarily for the inlet of fuel and a second phase primarily for the inlet of air;
- and
- opening said inlet valve substantially lower during said first phase than during said second phase, thereby pulverizing said fuel into fine droplets during said first phase.
Dependencies are inferred from the claim text.