Engine combustion control with ignition timing by pressure ratio management
Fuel control system for internal combustion engines
Air-fuel ratio control system for internal combustion engines
Method of detecting cylinder pressure in internal combustion engine Patent #: 4800500
ApplicationNo. 329287 filed on 03/27/1989
US Classes:123/435, Including cylinder pressure or temperature responsive means701/104Controlling fuel quantity
ExaminersPrimary: Argenbright, Tony M.
Attorney, Agent or Firm
Foreign Patent References
International ClassF02D 041/14
Foreign Application Priority Data1988-04-19 JP
AbstractAn air-to-fuel ratio control device for an internal combustion engine is disclosed, which comprises a pressure sensor for detecting the pressure P within a cylinder of the engine, and means for computing an actual value of the ratio (dP/dθ)max/Pmax, wherein (dP/dθ)max is the maximum rate of change in pressure P within the cylinder with respect to the crank angle θ and Pmax is the maximum pressure in the cylinder during a predetermined interval in a cycle of the cylinder. A target value of the ratio (dP/dθ)max/Pmax is obtained by converting the optimum air-to-fuel ratio corresponding to the operating condition of the engine, the conversion being effected by means of a relationship established between the values of the air-to-fuel ratio and those of the ratio (dP/dθ)max/Pmax. A control element controls the amount of injected fuel to reduce the deviation of the actual value of the ratio (dP/dθ)max/Pmax with respect to the target value thereof.
Field of SearchIncluding cylinder pressure or temperature responsive means