| 摘要 |
A method for monitoring the braking performance of a vehicle, the method including, for at least some of the braking events: determining a braking demand (118); determining vehicle deceleration (118); defining a first data set of braking events, wherein each braking event in the data set includes a determined braking demand and a determined vehicle deceleration; applying a statistical trend analysis method to the data set to generate a vehicle deceleration and braking demand trend (208); providing a vehicle deceleration and braking demand reference; and comparing at least one trend value with at least one reference value. From this comparison it is possible to determine if the braking system is operating within an acceptable limit. The method may include applying a weighted statistical trend analysis method, such as weighted least squares linear regression to the data set, which statistical trend analysis method uses vehicle load, braking demand or change in vehicle speed to weight the braking events. The reference value may have a non-zero (eg approximately 1 bar) braking demand value at zero deceleration. The data set may comprise a fixed number of braking events. Apparatus for implementing the method is also disclosed. |
