Vehicle engine stop control device

Abstract

The purpose of the present invention is to provide a vehicle engine stop control device that ensures a sufficient operation frequency of coast stop control in a scene of traveling on a congested road, thereby improving practical fuel consumption. The vehicle has, as a driving source, an engine (1) that can be restarted. This engine stop control device for an engine vehicle is provided with a coast stop control means for automatically stopping the engine (1) when the vehicle speed (VSP) has exceeded a coast stop (CS) start vehicle speed or lower as the vehicle speed (VSP) decreased after having traveled in excess of a first threshold value. The coast stop control means has a vehicle speed threshold value setting unit for setting a second threshold value which is slower than the first threshold value (S10), and the coast stop control means permits engine automatic stop operation by means of coast stop control at least once (S20) when vehicle travel has exceeded the second threshold value after having started from the engine automatic stop caused by the coast stop control and while traveling at a vehicle speed not exceeding the first threshold value.

Description

technical field [0001] The present invention relates to an engine stop control device for a vehicle in which a drive source of the vehicle is provided with a restartable engine, and coast stop control is performed to automatically stop the engine before the vehicle is stopped. Background technique [0002] Conventionally, there is known an engine stop control device for a vehicle that performs coast stop control ( For example, refer to Patent Document 1). [0003] Patent Document 1: (Japanese) Unexamined Patent Publication No. 11-257121 [0004] However, in the conventional device, only one threshold is set as the threshold of the vehicle speed, and after the engine is automatically stopped by the coast stop control, if the vehicle is not actually driven at a speed exceeding the threshold even after starting, the next engine will automatically stop. won't move. Therefore, there is a problem that it is difficult to obtain an actual fuel efficiency effect when traveling on ...

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that it is difficult to obtain an actual fuel consumption effect when driving on a congested road where acceleration and deceleration are continued in a low vehicle speed range where the vehicle speed does not exceed the threshold value.

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