Title:
EVAPORATIVE FUEL PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/021846
Kind Code:
A1
Abstract:
This evaporative fuel processing device comprises a canister, a purge path which is connected to the canister and to an intake path that is connected to an internal combustion engine and through which purge gas flows from the canister to the intake path, and a flow control valve that is provided in the purge path and that controls the flow rate of the purge gas, wherein: the evaporative fuel processing device further comprises a first pressure detection unit that detects a first pressure, which is the pressure at a first position on the purge path between the canister and the flow control valve, and a concentration estimation unit that estimates a purge concentration that is the concentration of the purge gas flowing in the purge path; and the concentration estimation unit determines a rising value of the first pressure generated by the closing of the flow control valve on the basis of the detection value from the first pressure detection unit, and estimates the purge concentration on the basis of the determined rising value of the first pressure.
Inventors:
NAKAGAWA MAKOTO (JP)
SEKO TAKAHIRO (JP)
SEKO TAKAHIRO (JP)
Application Number:
PCT/JP2019/021294
Publication Date:
January 30, 2020
Filing Date:
May 29, 2019
Export Citation:
Assignee:
AISAN IND (JP)
International Classes:
F02M25/08
Foreign References:
| JP2018017184A | 2018-02-01 | |||
| JP2017106334A | 2017-06-15 | |||
| JP2017214836A | 2017-12-07 | |||
| JP2008291916A | 2008-12-04 | |||
| JP2006161795A | 2006-06-22 |
Attorney, Agent or Firm:
COSMOS INTERNATIONAL PATENT & TRADEMARK OFFICE (JP)
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