- 专利标题: Methods and systems for variable displacement engine control
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申请号: US13106138申请日: 2011-05-12
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公开(公告)号: US08607544B2公开(公告)日: 2013-12-17
- 发明人: Michael James Uhrich , Adam Nathan Banker , James Michael Kerns , Stephen B. Smith
- 申请人: Michael James Uhrich , Adam Nathan Banker , James Michael Kerns , Stephen B. Smith
- 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: Alleman Hall McCoy Russell & Tuttle LLP
- 代理商 Julia Voutyras
- 主分类号: F01N3/00
- IPC分类号: F01N3/00 ; F02D7/00 ; F02D13/06 ; F02D17/02
摘要:
Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.