Method for functional testing of a lateral-acceleration sensor
First Claim
1. A method for functional testing of a lateral-acceleration sensor in a vehicle equipped with a dynamic stability control system including an electronic dynamic stability controller, comprising the steps of providing a level test surface suitable for accommodating said vehicle to simulate the driving position of said vehicle on a level road surface, measuring a first output of said lateral-acceleration sensor when said vehicle is in driving position on said level test surface to determine the sensor value that is valid for driving in a straight line, said first output having an amplitude and sign, tilting said vehicle such that its entire length is disposed at a preselected angle of inclination transverse to the driving direction to simulate the driving position of said vehicle on a curved road surface, measuring a second output of said lateral-acceleration sensor when said vehicle is in tilted position to determine the sensor value that is valid for driving on a curve, said second output having an amplitude and sign, calculating a preset sensor value corresponding to gravitational acceleration acting on said lateral-acceleration sensor at said preselected angle of inclination, said preset sensor value having an amplitude and sign, and comparing the amplitude and sign of said second output with the amplitude and sign of said calculated preset sensor value.
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Abstract
A method for functional testing of a lateral-acceleration sensor in a vehicle equipped with a dynamic stability control system. To simulate dynamic acceleration during driving on a curve, the sensor is checked by gravitational acceleration under static conditions. The method involves positioning the vehicle on a transverse ramp with known angle of inclination and comparing the acceleration force measured by the lateral-acceleration sensor with a preset sensor value determined on the basis of the angle of inclination of the ramp. The comparison is performed on the basis of amplitude and sign, and installation errors can be diagnosed based on an error log.
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14 Claims
- 1. A method for functional testing of a lateral-acceleration sensor in a vehicle equipped with a dynamic stability control system including an electronic dynamic stability controller, comprising the steps of providing a level test surface suitable for accommodating said vehicle to simulate the driving position of said vehicle on a level road surface, measuring a first output of said lateral-acceleration sensor when said vehicle is in driving position on said level test surface to determine the sensor value that is valid for driving in a straight line, said first output having an amplitude and sign, tilting said vehicle such that its entire length is disposed at a preselected angle of inclination transverse to the driving direction to simulate the driving position of said vehicle on a curved road surface, measuring a second output of said lateral-acceleration sensor when said vehicle is in tilted position to determine the sensor value that is valid for driving on a curve, said second output having an amplitude and sign, calculating a preset sensor value corresponding to gravitational acceleration acting on said lateral-acceleration sensor at said preselected angle of inclination, said preset sensor value having an amplitude and sign, and comparing the amplitude and sign of said second output with the amplitude and sign of said calculated preset sensor value.
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