JPH0224383U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a block diagram explaining the device of the present invention, FIG. 2 is a timing chart showing the operation of the device of the present invention, and FIG. 3 is a block diagram showing the configuration of a conventional device. 1...Engine body, 2...Ignition pulse detector, 3
... Waveform shaping circuit, 4... Pulse counter, 5... Time counter, 6... Holding buffer, 7... Interpolation calculator,
8... Interpolation buffer, 9... Prediction calculator, 10... Output buffer, 11... Selection circuit.

Claims (1)

[Claims for Utility Model Registration] A predetermined time is measured using an input circuit that performs waveform shaping processing on an engine ignition pulse or a signal equivalent thereto, a first counter that counts the number of pulses of the signal, and a reference clock. and a first buffer that holds the previous time measurement result performed by the second counter, and the number of cylinders in the engine is determined by the first and second counters. In the engine rotation signal processing device that measures the time for the same number of pulses as and outputs this measured value via a first buffer, the device further includes a new measured value measured by the first and second counters. and the previous measured value held in the first buffer,
An interpolation calculator interpolates the interpolated values according to the number of cylinders; a second buffer sequentially holds the interpolated values obtained by the interpolation calculator; An engine rotation signal processing device comprising: a prediction calculator that adds or subtracts an interpolated value of a second buffer, and performs average prediction of engine rotation.