Vehicle motion control device
First Claim
1. A vehicular device, comprising:
- a vehicle motion controller that acquires a shape of a curve present in front of a current position of a traveling vehicle, the vehicle motion controller also acquiring a position of the traveling vehicle;
a processor that outputs a command on a basis of the shape of the curve and on a basis of the position of the traveling vehicle, whereinfirst negative longitudinal jerk during a first time period that takes place before entering the curve, and a second negative longitudinal jerk during a second time period that takes place before the first time period, are generated in response to operation of a driving controller on a basis of the command output by the processor,the first time period and the second time period are included in a third time period that begins at a time when deceleration begins and that ends at a time at which negative acceleration becomes a maximum,positive longitudinal jerk is not generated in the third time period,wherein the vehicle motion controller also;
acquires road surface information relating to road surface along which the vehicle travels, andcomputes a command value relating to longitudinal acceleration to be caused to the vehicle, the command value being based upon the road surface information, andwherein the processor is also configured toacquire a forward-fixation-distance,acquire the command value based on the forward fixation distance,determine whether a road-surface-friction-coefficient is equal to or less than a predetermined value based on road surface information, whereinthe forward-fixation-distance in a first condition is longer than the forward-fixation-distance in a second condition,the first condition corresponds to the road-surface-friction-coefficient being equal to or less than the predetermined value, andthe second condition corresponds to the road-surface-friction-coefficient being larger than the predetermined value.
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Accused Products
Abstract
A vehicle motion control device includes curve shape acquisition means for acquiring a shape of a curve present in front of a currently traveling vehicle, vehicle position acquisition means for acquiring a position of the vehicle, and vehicle motion control arithmetic means for computing, on the basis of the shape of the curve and the position of the vehicle, a command value relating to longitudinal acceleration to be caused to the vehicle. During a time interval from before the vehicle reaches a near end of the curve, until the vehicle has approached the curve and traveled to a site having a constant or maximum curvature of the curve, the vehicle motion control arithmetic means computes a plurality of different negative longitudinal acceleration command values. Thus, even when there is no lateral motion, the vehicle motion control device accelerates/decelerates the vehicle while improving a driver'"'"'s feeling of slowdown.
22 Citations
15 Claims
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1. A vehicular device, comprising:
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a vehicle motion controller that acquires a shape of a curve present in front of a current position of a traveling vehicle, the vehicle motion controller also acquiring a position of the traveling vehicle; a processor that outputs a command on a basis of the shape of the curve and on a basis of the position of the traveling vehicle, wherein first negative longitudinal jerk during a first time period that takes place before entering the curve, and a second negative longitudinal jerk during a second time period that takes place before the first time period, are generated in response to operation of a driving controller on a basis of the command output by the processor, the first time period and the second time period are included in a third time period that begins at a time when deceleration begins and that ends at a time at which negative acceleration becomes a maximum, positive longitudinal jerk is not generated in the third time period, wherein the vehicle motion controller also; acquires road surface information relating to road surface along which the vehicle travels, and computes a command value relating to longitudinal acceleration to be caused to the vehicle, the command value being based upon the road surface information, and wherein the processor is also configured to acquire a forward-fixation-distance, acquire the command value based on the forward fixation distance, determine whether a road-surface-friction-coefficient is equal to or less than a predetermined value based on road surface information, wherein the forward-fixation-distance in a first condition is longer than the forward-fixation-distance in a second condition, the first condition corresponds to the road-surface-friction-coefficient being equal to or less than the predetermined value, and the second condition corresponds to the road-surface-friction-coefficient being larger than the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicular device, comprising:
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a vehicle motion controller that acquires a shape of a curve present in front of a current position of a traveling vehicle, the vehicle motion controller also acquiring a position of the traveling vehicle; a processor that outputs a command on a basis of the shape of the curve and on a basis of the position of the traveling vehicle, wherein first negative longitudinal jerk during a first time period that takes place before entering the curve, and a second negative longitudinal jerk during a second time period that takes place before the first time period, are generated in response to operation of a driving controller on a basis of the command output by the processor, the first time period and the second time period are included in a third time period that begins at a time when deceleration begins and that ends at a time at which negative acceleration becomes a maximum, positive longitudinal jerk is not generated in the third time period, wherein the vehicle motion controller also; acquires road surface information relating to road surface along which the vehicle travels, computes a command value relating to longitudinal acceleration to be caused to the vehicle, the command value being based upon the road surface information, the position of vehicle, the vehicle motion, the driver requested longitudinal acceleration, the lateral motion coordination longitudinal acceleration, and the road surface information, and where the command value relating to longitudinal acceleration is calculated using the following expression;
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Specification