Patent ID: 6157878
Filing Date: 2000-12-05
Classification: G01M

Abstract:
A controlling system for monitoring a detected actual vehicle speed of a test vehicle operated on a chassis dynamometer so as to follow a target vehicle speed, for determining a command torque corresponding to a load of the test vehicle from the detected actual vehicle speed and for controlling the chassis dynamometer in accordance with the command torque to control a running resistance to the test vehicle, the controlling system comprising:a speed monitoring section for detecting an abnormal condition indicative of a vehicle's disability to follow up the target vehicle speed, by monitoring the detected actual vehicle speed, the target vehicle speed and an accelerator opening of the test vehicle; anda correcting section for determining a correction quantity in accordance with a vehicle speed deviation between the actual vehicle speed and the target vehicle speed to ensure an ability to follow up the target vehicle speed, and for adding the correction quantity to the command torque when the abnormal condition is detected.