System for detecting inclination angle of vehicle body
First Claim
1. A process for determining the lateral overturning of a vehicle, comprising the steps of:
- establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
plotting a hysteresis line for an actual rolling angle and an actual rolling angular speed on said two-dimensional map; and
determining that there is a possibility that the vehicle is overturning laterally or sideways when the hysteresis line traverses the threshold value line from a side nearer to an origin of the map to a side farther from the origin;
said threshold value line being changed depending on at least one of a lateral acceleration of the vehicle, a lateral speed of the vehicle, a direction of change in steering angle of the vehicle, and a rolling angular acceleration of the vehicle.
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Abstract
A process for determining the lateral overturning of a vehicle, comprises the steps of: establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters; plotting a hysteresis line for an actual rolling angle and an actual rolling angular speed on the two-dimensional map; and determining that there is a possibility that the vehicle is overturning laterally or sideways when the hysteresis line traverses the threshold value line from a side nearer to an origin of the map to a side farther from the origin. The threshold value line is changed depending on at least one of a lateral acceleration of the vehicle, a lateral speed of the vehicle, a direction of change in steering angle of the vehicle, and a rolling angular acceleration of the vehicle.
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Citations
17 Claims
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1. A process for determining the lateral overturning of a vehicle, comprising the steps of:
- establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
plotting a hysteresis line for an actual rolling angle and an actual rolling angular speed on said two-dimensional map; and
determining that there is a possibility that the vehicle is overturning laterally or sideways when the hysteresis line traverses the threshold value line from a side nearer to an origin of the map to a side farther from the origin;
said threshold value line being changed depending on at least one of a lateral acceleration of the vehicle, a lateral speed of the vehicle, a direction of change in steering angle of the vehicle, and a rolling angular acceleration of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6)
- establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
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7. A process for determining the lateral overturning of a vehicle, comprising the steps of:
- establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
plotting a hysteresis line for an actual rolling angle and an actual rolling angular speed on said two-dimensional map; and
determining that there is a possibility that the vehicle is overturning laterally or sideways when the hysteresis line traverses the threshold value line from a side nearer to an origin of said map to a side farther from said origin;
said two-dimensional map including four quadrants in which positive and negative signs of the rolling angle and positive and negative signs of the rolling angular speed are combined with one another, whereby when said hysteresis line extends astride at least three of said quadrants and a distance of said hysteresis line from the origin is increased, said threshold value line is moved toward the origin.
- establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
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8. A system for detecting an angle of inclination of a vehicle, comprising:
- first detecting means for continuously detecting an angle of inclination of the vehicle with respect to a direction of the force of gravity;
second detecting means for continuously detecting an amount of change in angle of inclination of the vehicle by integrating angular speed of the vehicle; and
an adding means for adding a first output from said first detecting means and a second output from said second detecting means to calculate an angle of inclination of the vehicle. - View Dependent Claims (9, 10, 11, 13, 14, 15, 16, 17)
- first detecting means for continuously detecting an angle of inclination of the vehicle with respect to a direction of the force of gravity;
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12. A system for determining the lateral overturning of a vehicle, comprising:
- means for establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
means for plotting a hysteresis line for an actual rolling angle and an actual rolling angular speed on said two-dimensional map;
means for determining that there is a possibility that the vehicle is overturning laterally or sideways when the hysteresis line traverses the threshold value line from a side nearer to an origin of the map to a side farther from the origin; and
changing means for changing said threshold value line depending on at least one of a lateral acceleration of the vehicle, a lateral speed of the vehicle, a direction of change in steering angle of the vehicle, and a rolling angular acceleration of the vehicle.
- means for establishing a threshold value line on a two-dimensional map made using a rolling angle and a rolling angular speed of the vehicle as parameters;
Specification