JPS6466529A - Brake tester - Google Patents

Abstract

PURPOSE:To enable an efficient and accurate brake test even for a variety of four wheel-drive vehicles, by forming a rear roller means in such a manner as to move freely in a longitudinal way. CONSTITUTION:An automobile advances onto a brake tester from the direction of the arrow and front wheels A and A are placed almost right on a roller 3 (3a and 3b) of roller means 1A and 1B. Here, when rear wheels B and B are not placed on a roller 7 (7a and 7b), not positioned almost right on roller means 1C and 1D, for example, light receiving elements 9a and 9b as being blocked by the rear wheels B and B but remaining light receiving elements 9g and 9h alone receive the light. From the state of receiving light with the elements 9e-9h, a control means judge that the rear wheels B and B is ahead of the center of means 1C and 1D to generate a control signal corresponding to the judgement and a cylinder 8 is driver through an A/D converter, an electro-hydraulic converter to advance a rod 8a so that a base frame 6 moves somewhat forward. Thus, elements 9f and 9g judge that the rear wheels B and B are placed almost right on the means 1C and 1D, namely, on the roller 7 to stop the movement of the base.