Title:
EVAPORATED FUEL PROCESSING DEVICE AND CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/230231
Kind Code:
A1
Abstract:
An evaporated fuel processing device is provided with: a canister which adsorbs evaporated fuel generated in a fuel tank; a purge passageway which connects the canister and an intake pipe of an internal combustion engine, and through which purge gas sent from the canister to the intake pipe passes; a purge control valve which is disposed along the purge passageway and controls, by changing a duty ratio, the amount of purge gas supplied to the intake pipe; a pump which is disposed along the purge passageway and sends the purge gas out of the canister into the intake pipe; and a control unit which controls the duty ratio of the purge control valve. The control unit detects a pressure difference between the pressure at the upstream end of the purge passageway and the pressure at the downstream end of the purge passageway when the purge gas is being supplied, and corrects the duty ratio on the basis of the amount of purge gas supplied with respect to the duty ratio when the influence of the pump at the detected pressure difference is not considered.
Inventors:
NAKAGAWA MAKOTO (JP)
Application Number:
PCT/JP2018/018806
Publication Date:
December 20, 2018
Filing Date:
May 15, 2018
Export Citation:
Assignee:
AISAN IND (JP)
International Classes:
F02M25/08
Foreign References:
| JP2016217172A | 2016-12-22 | |||
| JP2007146797A | 2007-06-14 | |||
| JPH0979096A | 1997-03-25 | |||
| JP2016020675A | 2016-02-04 | |||
| JP2016164384A | 2016-09-08 | |||
| US5881700A | 1999-03-16 | |||
| US20130319378A1 | 2013-12-05 |
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (JP)
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