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1. (WO2018198715) VAPORIZED FUEL PROCESSING DEVICE

Pub. No.:    WO/2018/198715    International Application No.:    PCT/JP2018/014611
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Fri Apr 06 01:59:59 CEST 2018
IPC: F02M 25/08
Applicants: AISAN KOGYO KABUSHIKI KAISHA
愛三工業株式会社
Inventors: NAKAGAWA Makoto
中川 周
ASANUMA Daisaku
浅沼 大作
SUGIURA Masanori
杉浦 雅紀
Title: VAPORIZED FUEL PROCESSING DEVICE
Abstract:
This vaporized fuel processing device is provided with: a canister; a pump which delivers a purge gas containing vaporized fuel; a detecting unit which detects a specific pressure difference between the pressure of gas that has passed through the canister and the pump, and the pressure of the gas before passing through the canister and the pump; and an estimating unit which uses the specific pressure difference to estimate the flow rate of the purge gas supplied to an intake pathway. In the pump, the flow rate of the gas delivered by the pump increases as the pressure difference between the upstream side and the downstream side of the pump decreases, and increases as the purge gas density increases, and in the canister, the flow rate of the gas supplied from the canister decreases as the pressure difference between the upstream side and the downstream side of the canister decreases, and decreases as the density increases. The estimating unit may estimate the flow rate of the purge gas while the specific pressure difference is an unchanging pressure difference at which the gas flow rate does not change depending on the density.