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Device for testing vehicles

  • US 4,158,961 A
  • Filed: 08/25/1977
  • Issued: 06/26/1979
  • Est. Priority Date: 08/27/1976
  • Status: Expired due to Term
First Claim
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1. A testing system for testing vehicular performance under conditions simulating travel in a predetermined range of speeds or engine revolutions, comprising:

  • two sets of support rollers, each set of support rollers including two rollers mounted to rotate on parallel axes and supporting one of the wheels of the vehicle at two angularly spaced points around the wheel;

    first coupling means for coupling the rotation of said two rollers of each set of support rollers;

    second coupling means for selectively coupling and uncoupling the rotation of one set of support rollers to the other set of support rollers;

    two flywheels, each of a mass simulating the weight of the vehicle tested, and each of said flywheels connected to one of said rollers in a corresponding set of support rollers;

    two driving means, each for driving a corresponding one of said flywheels;

    two idling rollers, each disposed between the two rollers of a corresponding set of support rollers, for engaging the periphery of a wheel of the vehicle;

    two lateral deflection means, each for sensing the lateral force of deflection of a correspondingly one of said idling rollers and for producing a signal corresponding thereto;

    two flywheel motion sensing means, each for sensing the rotational motion of a corresponding one of said flywheels and producing a signal corresponding thereto;

    two idling roller velocity sensing means, each for sensing the rotational velocity of a corresponding one of said idling rollers and for producing a signal corresponding thereto;

    force means, for applying a downwardly directed force on the vehicle to simulate weight transfer during braking;

    engine power means, connected to said two flywheel motion sensing means for displaying or recording the engine power of the vehicle;

    wheel thrust means, connected to said two flywheel motion sensing means, for displaying or recording the wheel thrust of the vehicle;

    brake force means, connected to said two flywheel motion sensing means, for displaying or recording the force applied to each of the wheels by the brake at a predetermined velocity;

    deceleration means, connected to said two flywheel motion sensing means, for displaying or recording the deceleration of the vehicle after the brakes are applied at a given speed;

    slip distance means, connected to said two lateral deflection means and to said two flywheel motion sensing means, for displaying or recording the distance the vehicle will travel from the moment the wheels are locked until the vehicle stops;

    wheel alignment means, connected to said two lateral deflection means, for displaying or recording the wheel alignment of the vehicle when the vehicle is brought from one predetermined speed to another predetermined speed, and when said vehicle is braked from a predetermined speed to a standstill;

    braking distance means, connected to said two flywheel motion sensing means, for displaying or recording the distance the vehicle would travel when braked from a particular speed;

    distance and time means, connected to said two flywheel motion sensing means, for displaying or recording the distance and time the vehicle reaches a given speed from a standstill;

    power train losses means, connected to said two flywheel motion sensing means, for displaying or recording the power train losses from the flywheel to the wheels; and

    motor performance and transmission slip means, connected to said two flywheel motion sensing means, for displaying or recording slippage of the automatic transmission of the vehicle and the performance of the motor.

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