Apparatus and method for processing fuel vapor in internal combustion engine
First Claim
1. A fuel vapor processing apparatus in an internal combustion engine equipped with a supercharger comprising a compressor mounted in an intake air passage, said fuel vapor processing apparatus comprising:
- a canister for adsorbing fuel vapor being generated in a fuel tank;
a purge passage for communicating said canister to said intake air passage on the upstream side of said compressor; and
a pump mounted in the middle of said purge passage.
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Accused Products
Abstract
A purge passage is communicated to the upstream side of a compressor of a turbosupercharger, and on the other hand, a purge control valve and an electrically powered pump are mounted in the middle of said purge passage. Then, either a constant drive current is provided to said electrically powered pump, and the opening of the purge control valve is controlled in correspondence to the requested purged air flow rate, or the purge control valve is controlled to be fully opened, and the drive current of said pump is controlled in correspondence to the requested purged air flow rate.
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Citations
5 Claims
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1. A fuel vapor processing apparatus in an internal combustion engine equipped with a supercharger comprising a compressor mounted in an intake air passage, said fuel vapor processing apparatus comprising:
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a canister for adsorbing fuel vapor being generated in a fuel tank; a purge passage for communicating said canister to said intake air passage on the upstream side of said compressor; and a pump mounted in the middle of said purge passage. - View Dependent Claims (2, 3)
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4. A method of processing fuel vapor in an internal combustion engine equipped with a supercharger comprising a compressor mounted in an intake air passage, comprising the steps of:
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adsorbing fuel vapor generated in a fuel tank by a canister, supplying purged air of said canister to an intake air passage on the upstream side of said compressor through a purge passage in which an electrically power pump is mounted, and controlling a flow rate of said purged air by controlling a drive current being supplied to said electrically powered pump.
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5. A method of processing fuel vapor in an internal combustion engine equipped with a supercharger comprising a compressor mounted in an intake air passage, comprising the steps of:
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adsorbing fuel vapor generated in a fuel tank by a canister, supplying purged air of said canister to an intake air passage on the upstream side of a compressor through a purge passage in which an electrically power pump and a purge control valve are mounted, and controlling a flow rate of said purged air by controlling the opening of said purge control valve while controlling a drive current being supplied to said electrically powered pump to a constant value.
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Specification