Engine control system with fuel injection timing control method

Abstract

A fuel control system for a cylinder direct injection internal combustion engine. A predetermined portion of the fuel spray is appropriately ignited regardless of the correction of the ignition timing, thereby always securing stable, satisfactory combustion. In the case where the ignition timing is corrected, the fuel injection timing is corrected in accordance with the ignition timing correction amount. The fuel injection timing is corrected also with the change in the internal cylinder pressure and the fuel injection velocity taking the intake pipe pressure and the fuel pressure into account, thereby maintaining the required ignition point of the fuel spray.

1 . A fuel control system for a cylinder direct injection internal combustion engine for directly injecting the fuel into a combustion chamber by a fuel injection valve, comprising a fuel injection timing correction means for correcting the fuel injection timing of the fuel injection valve in accordance with the corrected ignition timing.  
   
   
       2 . The fuel control system for the internal combustion engine according to  claim 1 , 
 wherein the fuel injection timing correction means corrects by advancing the injection timing in the case where the ignition timing is corrected by advance, while the fuel injection timing correction means corrects by retarding the injection timing in the case where the ignition timing is corrected by retardation.    
   
   
       3 . The fuel control system for the internal combustion engine according to  claim 1 , 
 wherein the ignition timing is corrected at the time of at least selected one of the idle operation and the acceleration/deceleration.    
   
   
       4 . The fuel control system for the internal combustion engine according to  claim 1 , 
 wherein the fuel injection timing correction means corrects the fuel injection timing taking the parameters related to the fuel injection velocity into account.    
   
   
       5 . A fuel injection timing control method for a cylinder direct injection internal combustion engine for directly injecting the fuel into a combustion chamber by a fuel injection value, comprising the step of correcting the fuel injection timing of the fuel injection valve in accordance with a corrected ignition timing.