Vehicle turning motion control
First Claim
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1. A vehicle turning motion control apparatus for a vehicle, comprising:
- a turning condition sensing section configured to sense a turning condition of the vehicle;
a vehicle deceleration control section configured to initiate a deceleration control to decelerate the vehicle when the turning condition surpasses a deceleration start threshold;
a running state sensing section configured to sense a running state of the vehicle and to determine an absolute value of a variation of the running state; and
a threshold setting section configured to set the deceleration start threshold in accordance with the absolute value of the variation of the running state when the vehicle enters a turning state, wherein the threshold setting section is configured to determine a base threshold from a turning ability limit defining a limit of a stable vehicle turning performance region, and to determine the deceleration start threshold by modifying the base threshold in accordance with the absolute value of the variation of the running state;
wherein;
the turning condition is a turning radius of the vehicle;
the deceleration start threshold is a deceleration start turning radius threshold to be compared with the turning radius;
the base threshold is a base turning radius threshold;
the vehicle deceleration control section is configured to initiate the deceleration control to decelerate the vehicle when the turning radius of the vehicle becomes smaller than the deceleration start turning radius threshold; and
the threshold setting section is configured to determine the base turning radius threshold from the turning ability limit defining the limit of the stable vehicle turning performance region, and to determine the deceleration start turning radius threshold by modifying the base turning radius threshold in accordance with the absolute value of the variation of the running state of the vehicle; and
wherein the threshold setting section is configured to determine the turning ability limit which includes a limit turning radius defining the limit of the stable vehicle turning performance region in accordance with a vehicle speed of the vehicle, and to determine the base radius threshold by multiplying the limit turning radius by a predetermined coefficient which is greater than one.
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Abstract
A vehicle turning motion control apparatus includes a turning condition sensing section to sense a turning condition of the vehicle; and a vehicle deceleration control section to initiate a deceleration control to decelerate the vehicle when the turning condition exceeds a deceleration start threshold. The control apparatus further includes a running state sensing section configured to sense a running state of the vehicle, and a threshold setting section configured to set the deceleration start threshold in accordance with the running condition.
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Citations
14 Claims
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1. A vehicle turning motion control apparatus for a vehicle, comprising:
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a turning condition sensing section configured to sense a turning condition of the vehicle; a vehicle deceleration control section configured to initiate a deceleration control to decelerate the vehicle when the turning condition surpasses a deceleration start threshold; a running state sensing section configured to sense a running state of the vehicle and to determine an absolute value of a variation of the running state; and a threshold setting section configured to set the deceleration start threshold in accordance with the absolute value of the variation of the running state when the vehicle enters a turning state, wherein the threshold setting section is configured to determine a base threshold from a turning ability limit defining a limit of a stable vehicle turning performance region, and to determine the deceleration start threshold by modifying the base threshold in accordance with the absolute value of the variation of the running state;
wherein;the turning condition is a turning radius of the vehicle; the deceleration start threshold is a deceleration start turning radius threshold to be compared with the turning radius; the base threshold is a base turning radius threshold; the vehicle deceleration control section is configured to initiate the deceleration control to decelerate the vehicle when the turning radius of the vehicle becomes smaller than the deceleration start turning radius threshold; and the threshold setting section is configured to determine the base turning radius threshold from the turning ability limit defining the limit of the stable vehicle turning performance region, and to determine the deceleration start turning radius threshold by modifying the base turning radius threshold in accordance with the absolute value of the variation of the running state of the vehicle; and wherein the threshold setting section is configured to determine the turning ability limit which includes a limit turning radius defining the limit of the stable vehicle turning performance region in accordance with a vehicle speed of the vehicle, and to determine the base radius threshold by multiplying the limit turning radius by a predetermined coefficient which is greater than one. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vehicle turning motion control process for a vehicle, the vehicle turning motion control process comprising:
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sensing a turning condition of the vehicle; decelerating the vehicle by initiating a deceleration control when the turning condition surpasses a deceleration start threshold; sensing a running state of the vehicle; determining an absolute value of a variation of the running state; and setting the deceleration start threshold in accordance with the absolute value of the variation of the running state when the vehicle enters a turning state, wherein the deceleration start threshold is determined by determining a base threshold from a turning ability limit defining a limit of a stable vehicle turning performance region, and determining the deceleration start threshold by modifying the base threshold in accordance with the absolute value of the variation of the running state of the vehicle, wherein; the turning condition is a turning radius of the vehicle, the deceleration start threshold is a deceleration start turning radius threshold, the base threshold is a base turning radius threshold, the deceleration control is initiated to decelerate the vehicle when the turning radius of the vehicle becomes smaller than the deceleration start turning radius threshold, the base turning radius threshold is determined from the turning ability limit defining the limit of the stable vehicle turning performance region, and the deceleration start turning radius threshold is determined by modifying the base turning radius threshold in accordance with the absolute value of the variation of the running state of the vehicle, and wherein the turning ability limit, which includes a limit turning radius defining the limit of the stable vehicle turning performance region, is determined in accordance with a speed of the vehicle, and the base radius threshold is determined by multiplying the limit turning radius by a predetermined coefficient which is greater than one.
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14. A vehicle turning motion control apparatus for a vehicle, the vehicle turning motion control apparatus comprising:
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means for sensing a turning condition which includes a turning radius of the vehicle; means for comparing the turning radius with a deceleration start turning radius threshold, and initiating a deceleration control to decelerate the vehicle automatically when the turning radius becomes smaller than the deceleration start turning radius threshold; means for sensing a running state of the vehicle and for determining an absolute value of a variation of the running state; and means for setting the deceleration start turning radius threshold in accordance with the absolute value of the variation of the running state by using the absolute value of the variation of the running state to calculate the deceleration start turning radius threshold;
wherein;the setting means includes a means for determining a base turning radius threshold from a turning ability limit defining a limit of a stable vehicle turning performance region, and for determining the deceleration start turning radius threshold by modifying the base turning radius threshold in accordance with the absolute value of the variation of the running state of the vehicle by using the absolute value for the variation of the running state to calculate the deceleration start turning radius threshold; and wherein the setting means includes a means for determining the turning ability limit which includes a limit turning radius defining the limit of the stable vehicle turning performance region in accordance with a vehicle speed of the vehicle, and the means for determining the base radius threshold multiplies the limit turning radius by a predetermined coefficient which is greater than one.
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Specification