Patent ID: 9283962
Filing Date: 2016-03-15
CPC Classification: B60T,B60W

Claim Text:
1. A vehicle drawn down state detection device comprising: a vehicle speed detection means that detects a speed of a vehicle; an indirect longitudinal acceleration calculation means for indirectly calculating a longitudinal acceleration by calculating the longitudinal acceleration, which is an acceleration in a longitudinal direction of the vehicle, from change in the speed of the vehicle detected by the vehicle speed detection means; a drive state determination means that determines a state on generation of a driving force for the vehicle; an uphill travel detection means that detects an uphill traveling state in which the vehicle is traveling on an uphill in a direction of uphill; a vehicle drawn down state detection means for detecting a vehicle drawn down state in which the vehicle moves on the uphill in a direction opposite to the direction of uphill; and a direct longitudinal acceleration detection means for directly detecting longitudinal acceleration including a gravitational acceleration applied to the vehicle, wherein, when the uphill travel detection means detects the uphill traveling state and the drive state determination means detects a no-driving-force state in which the driving force for the vehicle is not generated, the vehicle drawn down state detection means detects that the longitudinal acceleration indirectly calculated by the indirect longitudinal acceleration calculation means is oriented in an accelerating direction, and determines that the vehicle is in the vehicle drawn down state, and wherein, if change occurs in a polarity of the longitudinal acceleration including the gravitational acceleration detected by the direct longitudinal acceleration detection means when the longitudinal acceleration indirectly calculated by the indirect longitudinal acceleration calculation means is oriented in the accelerating direction, the vehicle drawn down state detection means does not determine that the vehicle is in the vehicle drawn down state.