发明公开
EP1736656A1 Method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine
审中-公开
Verfahren zur Bestimmung und Regelung der Winkellage der Kurbenwelle einer Viertaktbrennkraftmaschine
- 专利标题： Method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine
- 专利标题（中）： Verfahren zur Bestimmung und Regelung der Winkellage der Kurbenwelle einer Viertaktbrennkraftmaschine
-
申请号： EP05105668.7申请日： 2005-06-24
-
公开(公告)号： EP1736656A1公开(公告)日： 2006-12-27
- 发明人: Chevalier, Alain , Christen, Urs , Vantine, Katie , Moraal, Paul Eduard , Bromham, Jim
- 申请人： Ford Global Technologies, LLC.
- 申请人地址： Fairlane Plaza South Suite 800 330 Town Center Drive Dearborn, MI 48126 US
- 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： Fairlane Plaza South Suite 800 330 Town Center Drive Dearborn, MI 48126 US
- 代理机构： Drömer, Hans-Carsten
- 主分类号： F02D41/34
- IPC分类号： F02D41/34 ; F02D35/02 ; G01L23/30
摘要：
The present invention relates to a method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine with at least one cylinder which is controlled by an engine control unit (ECU), comprising the following steps
■ ascertaining the crank angle of the crankshaft by means of a crankshaft sensor, which scans the crankshaft, in particular a toothed wheel attached to the crankshaft,
■ determining the present phase of the respective operation cycle of said at least one cylinder by using at least one second sensor in order to distinguish between gas inlet and expansion stroke or gas outlet and compression stroke, and
■ synchronising the engine if necessary.
It is the objective of the present invention to provide a method of the above mentioned kind which does not require fuelling the engine during the synchronization procedure.
With respect to the objective a method is provided comprising the following steps:
■ using at least one pressure sensor as said at least one second sensor which is capable of detecting directly or indirectly a change of the in-cylinder pressure, in particular a rise of the in-cylinder pressure,
■ measuring at least once the output signal p Sensor,A of said at least one pressure sensor in a first crank angle domain comprising the top dead centre (TDC),
■ measuring at least once the output signal p Sensor,B of the at least one pressure sensor in a second crank angle domain spaced apart from said first crank angle domain ,
■ calculating the expression p = pSensor,A - P Sensor , B ,
■ comparing p with a predetermined threshold P threshold ,
■ synchronizing the engine by shifting the output signal of the ECU for injection and/or ignition by 360°CA forwards or backwards, if
p ≤ p threshold
■ ascertaining the crank angle of the crankshaft by means of a crankshaft sensor, which scans the crankshaft, in particular a toothed wheel attached to the crankshaft,
■ determining the present phase of the respective operation cycle of said at least one cylinder by using at least one second sensor in order to distinguish between gas inlet and expansion stroke or gas outlet and compression stroke, and
■ synchronising the engine if necessary.
It is the objective of the present invention to provide a method of the above mentioned kind which does not require fuelling the engine during the synchronization procedure.
With respect to the objective a method is provided comprising the following steps:
■ using at least one pressure sensor as said at least one second sensor which is capable of detecting directly or indirectly a change of the in-cylinder pressure, in particular a rise of the in-cylinder pressure,
■ measuring at least once the output signal p Sensor,A of said at least one pressure sensor in a first crank angle domain comprising the top dead centre (TDC),
■ measuring at least once the output signal p Sensor,B of the at least one pressure sensor in a second crank angle domain spaced apart from said first crank angle domain ,
■ calculating the expression p = pSensor,A - P Sensor , B ,
■ comparing p with a predetermined threshold P threshold ,
■ synchronizing the engine by shifting the output signal of the ECU for injection and/or ignition by 360°CA forwards or backwards, if
p ≤ p threshold
信息查询
