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1. 发明申请

WO2023062041A1 METHOD OF OPERATING A FUEL INJECTION SYSTEM 审中-公开
公开(公告)号：WO2023062041A1
公开(公告)日：2023-04-20
申请号：PCT/EP2022/078311
申请日：2022-10-11
申请人： DELPHI TECHNOLOGIES IP LIMITED , BORGWARNER FRANCE SAS
发明人： PERROT, Baptiste , GACON, David
IPC分类号： F02D41/24
摘要： The invention relates to a method of controlling fuel injection in an internal combustion engine having at least one cylinder with an associated fuel injector for performing injector events, wherein for each injector event a drive signal is generated to cause an opening of the fuel injector to spray fuel in accordance with a demand fuel quantity. In a drive mode, the drive signal has a length, PWf, that corresponds to a reference length, PWref, determined from a reference map, MAP-PWref, of demand fuel quantity vs. pulse length, and corrected by a correction value, PWcorr. PWcorr is determined based on a map, MAP-PWcorr, depending on demand fuel quantity, the map MAP-PWcorr being learned during engine runtime and representing a difference between a learned, injector-specific hydraulic open time and a reference hydraulic open time.

2. 发明申请

WO2022171818A1 METHOD OF DETERMINING THE OPENING DELAY OF A FUEL INJECTOR 审中-公开
公开(公告)号：WO2022171818A1
公开(公告)日：2022-08-18
申请号：PCT/EP2022/053412
申请日：2022-02-11
申请人： DELPHI TECHNOLOGIES IP LIMITED , BORGWARNER FRANCE SAS
发明人： PERROT, Baptiste , GACON, David
IPC分类号： F02D41/20 , F02D41/24
摘要： A method of controlling the operation of a solenoid activated fuel injector, said fuel injector including an actuator including a solenoid, and adapted to control a needle valve dependent on an activation pulse sent to said solenoid, so as to control said needle valve via movement of a needle from and to a valve seat to dispense fuel, said method comprising the steps of: a) determining the minimum drive pulse (MDP1) required for the needle valve of said injector to open; b) determining the closing response (CRMDP1) of the injector during MDP conditions, where the closing response is defined as the time duration between the end of activation pulse (t3) and the time that needle valve closes (t4); c) from steps a) and b) determine the total operational time (TODMDP1) during MDP conditions of the injector, where the total operation time is defined as the time between the start of the activation pulse and the time of the needle valve closing; d) determining the difference (ΔTODMDP) between the value (TODMDP1) determined from step c) and a stored value of total operational time during MDP conditions for a reference injector (TODrefMDP) e) determining the value of the difference (ΔOD) between the opening delay of the injector and a stored the opening delay of the reference injector from step d) f) controlling the operation based on the parameter at e).

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