On-board brake warning device for air brake equipped vehicles
First Claim
1. A method of monitoring a vehicle'"'"'s braking system and providing an indication of brake condition, comprising:
- creating a performance model for brake performance;
acquiring data indicative of actual brake performance in response to actuation of the brakes;
comparing the data with the model;
if the comparison with the model exceeds a threshold, providing an indication; and
creating the performance model to estimate the vehicle'"'"'s braking effect as a function of brake response delay.
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Accused Products
Abstract
A brake warning system for vehicles with pneumatic air brakes monitors various factors to provide an indication of a pending or actual brake failure condition. According to one embodiment, vehicle brakes are tested by determining a delay time between pressure changes in a control brake line from a treadle valve and the response of the brake. According to another embodiment, brake performance is measured by monitoring applied brake line pressure versus known brake performance values. Measurements are taken with the brakes in a known good condition, during a "training mode," and data is then compared, on a continuous basis, with data acquired by ongoing measurements. The invention provides an on-board, real-time, assessment of vehicle brake performance, through measurement of a relatively small number of parameters.
78 Citations
10 Claims
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1. A method of monitoring a vehicle'"'"'s braking system and providing an indication of brake condition, comprising:
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creating a performance model for brake performance; acquiring data indicative of actual brake performance in response to actuation of the brakes; comparing the data with the model; if the comparison with the model exceeds a threshold, providing an indication; and creating the performance model to estimate the vehicle'"'"'s braking effect as a function of brake response delay. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of monitoring a vehicle'"'"'s braking system for the purpose of determining brake degradation, the method comprising the steps of:
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creating a model of the vehicle'"'"'s braking effect as a function of brake response delay; determining an actual brake response delay during vehicle operation; and comparing the model brake response delay with the determined brake response delay to determine brake degradation. - View Dependent Claims (9, 10)
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Specification