Method and device for controlling the combustion mode of an internal combustion engine
AssigneePeugeot Citroen Automobiles SA
InventorMarc Lagier
Life of this patent
Estimating the term…
Abstract
Device for controlling the mode of combustion of a controlled-ignition four-stroke petrol engine (1) equipped with a system (2) for the direct injection of fuel into the combustion chamber, with at least one catalytic converter (3) placed in the exhaust line (4) of the engine (1) and with a control system (5) receiving information from sensors (6, 7, 9, 10) relating to the rotational speed and to the load of the engine, to the position of the accelerator pedal, and to the temperatures of the engine and of the exhaust gases, characterized in that the control system (5) includes a device for choosing a priority mode of combustion taking account of the said information and on the basis of an estimate of the combustion efficiency of the various modes available.
Claims16
A control device for controlling modes of combustion of a controlled-ignition four-stroke engine capable of operating in a plurality of combustion modes, a system being arranged for direct injection of fuel into a combustion chamber of the engine, and at least one catalytic converter being located in an exhaust line of the engine, the control device comprising:
- a control system that receives information from sensors relating to a rotational speed of the four-stroke engine, a load of the engine, a position of an accelerator pedal, a temperature of the engine, and a temperature of engine exhaust gases, the control system comprising:
- means for selecting a priority mode of combustion from the various modes of combustion using the information from the sensors and based on an estimate of the combustion efficiency of the various modes of combustion available to the engine.
A method for controlling the mode of combustion of a controlled-ignition four-stroke engine capable of operating in a plurality of combustion modes, a system being arranged for the direct injection of fuel into a combustion chamber of the engine, and at least one catalytic converter being located in an exhaust line of the engine, the method comprising:
- receiving information at a control system, the information relating to a rotational speed of the four-stroke engine, a load of the engine, a position of an accelerator pedal, a temperature of the engine, and a temperature of engine exhaust gases;
- estimating a combustion efficiency of various modes of combustion of the four-stroke engine;
- and
- selecting a priority mode of combustion from the various modes of combustion using the estimates of combustion efficiency and using the information relating to the rotational speed of the four-stroke engine, the load of the engine, the position of the accelerator pedal, the temperature of the engine, and the temperature of the engine exhaust gases.
Dependencies are inferred from the claim text.