EVAPORATED FUEL TREATMENT DEVICE
To provide technique for inhibiting evaporated fuel from flowing out when a valve opening start position of a blocking valve is specified, and to provide technique for inhibiting evaporated fuel from being adsorbed to an adsorbent of a canister to reduce the adsorption capacity.SOLUTION: An evaporat...
Gespeichert in:
1. Verfasser: | |
---|---|
Format: | Patent |
Sprache: | eng ; jpn |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | To provide technique for inhibiting evaporated fuel from flowing out when a valve opening start position of a blocking valve is specified, and to provide technique for inhibiting evaporated fuel from being adsorbed to an adsorbent of a canister to reduce the adsorption capacity.SOLUTION: An evaporated fuel treatment device comprises a pressurization pump which pressurizes a gas in a vapor passage on a downstream side of a blocking valve to the blocking valve side, a first pressure sensor which directly or indirectly detects a pressure in a fuel tank, and/or a second pressure sensor which directly or indirectly detects the pressure in the vapor passage on the downstream side of the blocking valve. When the blocking valve is operated from a valve close state to a valve open side in a state where the pressurization pump pressurizes the gas in the vapor passage on the downstream side of the blocking valve to the blocking valve side, a control unit specifies a valve opening start position in which the blocking valve changes to a valve open state from the valve close state, on the basis of a detected pressure by the first pressure sensor and/or a detected pressure by the second pressure sensor.SELECTED DRAWING: Figure 1
【課題】封鎖弁の開弁開始位置を特定するときに蒸発燃料が流出することを抑制することができる技術を提供する。キャニスタの吸着材に蒸発燃料が吸着されて吸着能力が低下してしまうこと抑制することができる技術を提供する。【解決手段】蒸発燃料処理装置は、封鎖弁よりも下流側のベーパ通路内の気体を封鎖弁側に加圧する加圧ポンプと、燃料タンク内の圧力を直接的又は間接的に検出する第1圧力センサ、及び/又は、封鎖弁よりも下流側のベーパ通路内の圧力を直接的又は間接的に検出する第2圧力センサと、を備えている。制御部は、前記加圧ポンプが前記封鎖弁よりも下流側の前記ベーパ通路内の気体を前記封鎖弁側に加圧している状態で、前記封鎖弁が前記閉弁状態から開弁側に動作する場合に、前記第1圧力センサの検出圧力、及び/又は、前記第2圧力センサの検出圧力に基づいて前記封鎖弁が前記閉弁状態から前記開弁状態に変化する開弁開始位置を特定する。【選択図】図1 |
---|