IGNITION TIMING CONTROLLER FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE:To improve the responsive property of control by setting a desired valuer of maximum pressure peak value (indicated pressure peak value) of internal pressure in an engine to a regional value to vary the regional width according to the running condition and control ignition timing for putting actually measured indicated pressure peak value in this region. CONSTITUTION:The maximum value of the output signal of an indicated pressure signal generating circuit 1 containing a pressure sensor embedded in a cylinder head is held in a peak holding circuit 4. Also, a count value of a counter 6 for counting clock pulses from a clock generating circuit 2 is latched by a latch circuit 10 in a predetermined period and when the count value reaches a predetermined value a read-out commanding signal is supplied from a decoder 11 to an ignition timing setting circuit 8 which is provided to advance or delay the previously set ignition angle according to whether or not a difference between indicated pressure peak position data and desired one falls within a predetermined range. The width of said predetermined range is varied according to engine parameters.