Method for preparing an internal combustion engine for starting
AssigneeFord Global Technologies, LLC
InventorsKlemens Grieser, Ulrich Kramer
Life of this patent
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Abstract
The invention relates to a method for improving the initial conditions for starting a direct injection, spark-ignition internal combustion engine. Measures, such as adjusting the throttle valve, a varying inlet and exhaust valve timings, operating a secondary-air pump, ensures that the internal combustion engine, when running down, scavenges exhaust gases from the cylinder by providing fresh air into the. Furthermore, measures are undertaken for the braking and/or active rotation of the internal combustion engine so that it is a suitable position for renewed starting, the restarting being accomplished without the aid of a starter motor.
Claims6
A method for preparing an internal combustion engine for restarting, comprising:
- replacing exhaust gases in engine cylinders with fresh air after engine rotation has stopped;
- and
- braking the engine during a rundown of the engine, such braking being accomplished to stop the engine in predetermined ranges of rotational positions when the engine is in a switched-off state wherein said braking is supplied by a variable camshaft timing device.
A method for preparing an internal combustion engine for restarting, comprising:
- replacing exhaust gases in engine cylinders with fresh air after engine rotation has stopped;
- and
- providing a rotational energy to a crankshaft of the engine during a rundown of the engine, such rotational energy being supplied so as to stop the engine in predetermined ranges of positions when the engine is in a switched-off state wherein said rotational energy is supplied by one or more of an air-conditioning compressor and a power steering pump.
A method for preparing an internal combustion engine for restarting, comprising:
- replacing exhaust gases in engine cylinders with fresh air after engine rotation has stopped;
- and
- braking the engine during a rundown of the engine, such braking being accomplished to stop the engine in predetermined ranges of rotational positions when the engine is in a switched-off state wherein said braking is supplied by one or more of an air-conditioning compressor and a power steering pump.
Dependencies are inferred from the claim text.