Patent ID: 9067585
Filing Date: 2015-06-30
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. A control device for a hybrid vehicle, comprising: an engine and a motor as drive sources of a vehicle; a gradient detection unit adapted to detect a gradient of a road surface; a gradient determination control unit adapted to determine that a road surface is a gradient road and holding a gradient determination result if the engine is in a stopped state and a state where the road surface gradient detected by the gradient detection unit is not smaller than a gradient determination threshold value continues for a first predetermined time or longer; an engine start control unit adapted to issue an engine start request on the condition that the gradient determination result is held by the gradient determination control unit and suspending the start of the engine until a start permission condition of the engine is satisfied after the engine start request; and a traveling state determination unit adapted to determine whether the vehicle is in a traveling state or in the stopped state; wherein the gradient determination control unit releases the hold of the gradient determination result to the effect that the road surface is the gradient road, while the start of the engine is suspended, on the condition that: a state where the road surface gradient detected by the gradient detection unit is smaller than a gradient release determination threshold value continues for a second predetermined time or longer if the vehicle is determined to be in the traveling state by the traveling state determination unit; and the road surface gradient detected by the gradient detection unit becomes smaller than the gradient release determination threshold value if the vehicle is determined to be in the stopped state by the traveling state determination unit.