Patent ID: 8771147

Claim:
A coast stop vehicle which executes a coast stop control for stopping an engine during travel of the vehicle, comprising: a frictional engagement element provided between the engine and a driving wheel; a first deceleration calculating unit configured to calculate a first deceleration, which is rotation deceleration of a rotation shaft on a driving wheel side of the frictional engagement element; an engine rotation speed detecting unit configured to detect an engine rotation speed; a second deceleration calculating unit configured to calculate a second deceleration, which is engine rotation deceleration; and an engagement-state control unit configured to control an engagement state of the frictional engagement element such that a decrease of the engine rotation speed is suppressed based on the first deceleration and the second deceleration while the coast stop control is executed, release the frictional engagement element if the engine rotation speed is smaller than a first predetermined speed at which the engine is re-startable by re-injection of fuel, and the second deceleration is larger than the first deceleration, and engage the frictional engagement element if the engine rotation speed is smaller than the first predetermined speed, and the second deceleration is equal to or less than the first deceleration.