DRIVE UNIT FOR A MOTOR VEHICLE, MOTOR VEHICLE FITTED WITH SUCH A DRIVE UNIT AND COMPUTER SOFTWARE PRODUCT FOR CONTROLLING THE DRIVE UNIT
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Abstract
A drive unit for a motor vehicle includes an internal combustion engine having a feeder line for feeding combustion air to the internal combustion engine and a compressor device that cooperates with the feeder line and by means of which the combustion air is compressed for the internal combustion engine. A bypass line opens into the feeder line, and through which the combustion air can be fed to the internal combustion engine without passing through the compressor device. An isolating mechanism associated with the bypass line serves to shut off and/or adjust the quantity of combustion air that flows through the bypass line. A control unit controls the isolating mechanism in such a manner that the isolating mechanism is at least partly closed or is caused to at least partly close when the internal combustion engine is in coasting mode.
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Citations
35 Claims
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1-15. -15. (canceled)
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16. A drive unit for a motor vehicle comprising:
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an internal combustion engine; a feeder line configured to feed combustion air to the internal combustion engine; a compressor device operably coupled to the feeder line and configured to compress the combustion air fed to the internal combustion engine; a bypass line in fluid communication with the feeder line through which the combustion air can be fed to the internal combustion engine without passing through the compressor device, the byline line having an isolating mechanism operable to adjust a quantity of combustion air that flows through the bypass line; and a control unit configured to control the isolating mechanism such that the isolating mechanism is at least partly closed when the internal combustion engine is either in a coasting mode or operating below or at a full suction load. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for operating drive unit of a motor vehicle
drawing combustion air through a feeder line; -
compressing a first portion of the combustion air in the feeder line; feeding the compressed combustion air into an internal combustion engine; and selectively opening a bypass valve in the feeder line to feed a second, uncompressed portion of the combustion air in the feeder line to the internal combustion engine when the internal combustion engine is either in a coasting mode or the internal combustion engine is operating below or at its full suction load. - View Dependent Claims (33)
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- 28. The method according to claim 28 further comprising at least partially opening a throttle valve in the feeder line when the internal combustion engine is in coasting mode and the isolating mechanism is at least partly closed.
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29. The method according to claim 29 further comprising selectively closing the throttle valve when the quantity of combustion air fed to the internal combustion engine exceeds a predetermined value and when the internal combustion engine is either in the coasting mode or operating below or at the full suction load.
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32. The method according to claim 32 wherein the compressor is selectively driven when the internal combustion engine is either in the coasting mode or operating below or at the full suction load.
Specification