Device for detecting variation of rotational speed of internal-combustion engine

Abstract

Abstract PURPOSE:To obtain the information of engine speed without being affected by variations in rotational speed, by calculating the averaged speed of an engine in association with a pulse representing the top dead center timing, and as well by obtaining the integrated value of variation amounts of engine speed in accordance with the above-mentioned averaged speed. CONSTITUTION:A computing and processing device 4 computes the rotational speed of an engine at every engine top dead center timing in accordance with a timing pulse P which is delivered from a timing pulse generator 5 and which represents the top dead center timing of the engine, and then, computes a control signal in accordance with rotational speed data, accelerator data D1 and water temperature data D2. Therefore, a servo device 6 is controlled in accordance with the control signal to position the fuel adjusting member of a fuel injection pump 3. In this stage, the computing and processing device 4 further computes an averaged engine speed at every time when the pulse P is delivered, and as well computes the speed variation coefficient of the engine at every time when (m) number of pulses P are generated. Then, the integrated value of the speed variation coefficients which is calculated based upon the speed variation coefficient is delivered as data representing the variation amount of the speed.

Inventors

• 👤 Koichi Izumi
• 👤 泉　康一

Bibliographic Details