Abstract: A method for producing trigger pulses in relation to a preset phase of motion proceeding with a continuously variable period, whereby pulses are accumulated, and at the same time two time intervals are successively determined within the fundamental time interval as the phase of the motion is changed by a preset value. The durations of these two time intervals and the sign of the difference between them are used to correct the number of stored pulses which are counted until a preset number is reached, which moment marks the onset of a trigger pulse. The device for effecting this method comprises a unit for determining the difference between time intervals and correcting the fundamental time interval, which is connected to a control unit, a main pulse counter and a main controlled frequency divider connected, in turn, to a pulse generator. The control unit is connected to a control pulse unit and an initial adjustment unit.

Abstract: An automatic device comprises a complex plane analyzer of a vibration signal of a measured engine unit, electrically coupled via a switch to a computer. The device also comprises a synchronization unit whose inputs are connected to sensors of the angular position of the vehicle engine shaft and transmission shaft, an ignition sensor and a sensor of fuel injection to the cylinders of the vehicle engine. A control input of the unit is coupled to the output of a control unit. There is also an operational parameter measuring unit connected by its inputs to outputs of the synchronization unit and to the output of the control unit. An engine shaft rotational frequency adjustment unit is connected by its input to the control unit and to the synchronization unit and by its output to the actuator controlling fuel supply to the engine cylinders.