Investigation on the Effect of Lubricating-Oil Temperature on Deceleration Process of the Diesel Eng

The variation of the curve of the no-load deceleration process of the diesel engine is affected by the lubricating-oil temperature. To improve the evaluating accuracy of the diesel engine technical condition by using no-load deceleration process, the investigation on the deceleration process curve under various lubricating-oil temperatures of a special-type ve-hicular diesel engine is conducted and the no-load deceleration curve tested under various lubricating-oil temperatures is normalized. The normalized calculation method is searched. As a result, the repeatability of the no-load deceleration curve is improved and the absolute time error of no-load deceleration under various lubricating oil temperatures is reduced.