ratio is given by performing double factor joint adjustment in soft measurement and fixed mixing ratio on the injection pulse width and the intake quantity will be given by the control system to perform the predictive closed loop control the control system determines the predictive closed loop control and the predictive control via judging the trend according to the changing direction of the changing rate of the oxygen sensor signal thus the effect of the time lag will be reduced to the minimum to great degree the disturbance caused by the time lag is deviation elimination and anti jamming processed by the cerebellum model arithmetic controller cmac which aims to make the controlled air fuel ratio target to trace the expected predicted air fuel ratio according to the expected dynamic characteristic so as to make the system to achieve a stable precise control as shown in fig5 an embodiment of performing ignition timing control of the engine with applying ignition combined parameter map is described the basic ignition timing parameter map is given by the control system based on the basic ignition timing parameter maps according to the crankshaft position signal reflecting the rotational speed and the top dead center position the intake pressure signal reflecting the load size the injection pulse width signal reflecting the air fuel ration condition the throttle valve position signal reflecting the operation intention and the multi factor correlation among these signals since the associated working status parameters aiming at the ignition timing control is a.