Invention Grant
- Patent Title: Method and device for determining a switchover condition in order to initiate a valve lift changeover in an internal combustion engine
- Patent Title (中): 用于确定切换状态以便启动内燃机中的气门升程转换的方法和装置
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Application No.: US12067217Application Date: 2006-09-04
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Publication No.: US07779798B2Publication Date: 2010-08-24
- Inventor: Frank Weiss
- Applicant: Frank Weiss
- Applicant Address: DE Hannover
- Assignee: Continental Automotive GmbH
- Current Assignee: Continental Automotive GmbH
- Current Assignee Address: DE Hannover
- Agency: King & Spalding L.L.P.
- Priority: DE102005047023 20050930
- International Application: PCT/EP2006/065953 WO 20060904
- International Announcement: WO2007/057245 WO 20070524
- Main IPC: F01L1/34
- IPC: F01L1/34

Abstract:
In a method for determining the switchover condition in order to initiate a valve lift changeover in an internal combustion engine, the torque requirement (TQ REQ) is determined. Also, an operational variable of the internal combustion engine, which is representative for an operational state of the internal combustion engine, is determined. According to the operational variable, a duration of time (T), which is required in the current operational state in order to carry out at least one prepared amount for the valve lift changeover, is determined. An alteration value, which is representative for the alteration of the torque condition (TQ_REQ), is determined. The valve lift changeover is initiated by the duration of time (T) and the alteration value (TQ_REQ) according to the torque requirement (TQ REQ).
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