- 专利标题: Systems and methods for reducing vehicle evaporative emissions
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申请号: US15068839申请日: 2016-03-14
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公开(公告)号: US10047705B2公开(公告)日: 2018-08-14
- 发明人: Aed M. Dudar , Dennis Seung-Man Yang
- 申请人: Ford Global Technologies, LLC
- 申请人地址: US MI Dearborn
- 专利权人: Ford Global Technologies, LLC
- 当前专利权人: Ford Global Technologies, LLC
- 当前专利权人地址: US MI Dearborn
- 代理机构: McCoy Russell LLP
- 代理商 Julia Voutyras
- 主分类号: F02M25/08
- IPC分类号: F02M25/08 ; F02M35/02 ; F02D41/00 ; F02D41/04
摘要:
Methods and systems are provided for managing fuel vapor in a vehicle evaporative emissions system configured with a fuel vapor canister for capturing and storing vapors from a vehicle fuel tank. In one example, a three-way valve is positioned between the fuel vapor canister and atmosphere, and may function during engine-off conditions to direct fuel tank vapors through the fuel vapor canister where they may be adsorbed, and then to an intake manifold of the engine where a second adsorbent for capturing and storing fuel vapors is positioned. In this way, fuel vapors that are not adsorbed by the fuel vapor canister, or fuel vapors that are freed from the canister during engine-off conditions may be routed to the second adsorbent prior to exiting to atmosphere, thus reducing undesired bleed emissions.
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