Apparatus for testing and evaluating the performance of an automobile

• US 6,044,696 A
• Filed: 04/10/1997
• Issued: 04/04/2000
• Est. Priority Date: 04/10/1997
• Status: Expired due to Fees

• Current Assignee: Northern California Diagnostic Laboratories Incorporated
• Original Assignee: Northern California Diagnostic Laboratories Incorporated
• Inventors: Spencer-Smith, Michael
• Primary Examiner(s): DOMBROSKE, GEORGE M
• Application Number:
  US08/833,862
• Time in Patent Office: 1,090 Days
• Field of Search: 73/117, 73/865.6, 73/117.2, 73/117.3, 73/116
• US Class Current: 73/118.01
• CPC Class Codes: G01M 17/007 Wheeled or endless-tracked vehicles G01M17/08 takes precedence

Abstract

Apparatus for testing and evaluating the performance of an automobile under simulated conditions includes torque applicators for connection to wheel shafts of an automobile and for applying torque forces to the wheel shafts, movable supports supporting the torque applicators and a force applicator for connection to the automobile to apply forces to the automobile. A control associated with the torque applicators and the force applicator varies the torque forces applied by the torque applicators to the wheel shafts and varies the forces applied to the automobile by the force applicator.

Claims

1. Apparatus for testing and evaluating the performance of an automobile including a frame and wheel shafts under simulated conditions with the automobile not being supported by tires, said apparatus comprising, in combination:

torque applicator means for attachment to wheel shafts of an automobile to support the automobile by said wheel shafts when attached thereto and independently apply torque forces to said wheel shafts;

movable support means supporting said torque applicator means;

force applicator means for connection to said automobile at a location on said automobile spaced from said wheel shafts to apply forces to the automobile at said location;

control means operatively associated with said torque applicator means and with said force applicator means for selectively varying the torque forces applied by said torque applicator means to the wheel shafts when attached thereto and for varying the forces applied to said automobile at said location by said force applicator, said torque applicator means comprising a plurality of torque applicators for attachment to the wheel shafts controlled by said control means, and said movable support means comprising a plurality of movable supports, each of said movable supports supporting a torque applicator and independently movable relative to the other of said movable supports; and

mover means operatively associated with said independently movable supports to move said movable supports up and down independently of one another during testing and evaluation of said automobile to simulate road or race track surface conditions.

2. The apparatus according to claim 1 additionally comprising sensor means for sensing automobile performance under test.

3. The apparatus according to claim 1 wherein said torque applicators comprise hydraulic motors for selectively applying either negative torque forces or positive torque forces to said wheel shafts.

4. The apparatus according to claim 1 wherein each of said movable supports includes a first support member movable in a generally horizontal plane.

5. The apparatus according to claim 4 wherein each of said movable supports additionally includes a second support member connected to the first support member thereof, movable with respect to the first support member thereof, and extending upwardly from the first support member thereof, each of said second support members having a torque applicator attached thereto and supported thereby for receiving an end of a wheel shaft of said automobile.

6. The apparatus according to claim 5 wherein each second support member is pivotally connected to the first support member associated therewith.

7. The apparatus according to claim 4 additionally comprising base means disposed under said first support members.

8. The apparatus according to claim 7 wherein said base means comprises a plurality of base members and wherein bearing means is disposed between each base member and an associated first support member, said bearing means facilitating movement of said first support members in a generally horizontal plane.

9. The apparatus according to claim 8 wherein each said base member has a substantially planar top base surface and wherein each first support member has a substantially planar bottom support surface parallel to the substantially planar top base surface of the base member associated therewith, said bearing means including ball bearings disposed between each of said first support members and associated base member.

10. The apparatus according to claim 1 additionally comprising locking means for selectively locking said movable supports against movement.

11. The apparatus according to claim 10 wherein said locking means comprises at least one clamp for clamping each of said movable supports.

12. The apparatus according to claim 10 wherein said at least one clamp comprises a caliper clamp.

13. The apparatus according to claim 1 additionally comprising a housing defining a housing interior for accommodating said automobile while the performance of said automobile is being tested and evaluated by said apparatus.

14. The apparatus according to claim 13 wherein said housing comprises a portable module accommodating said torque applicator means, said movable support means, and said force applicator means within the interior thereof.

15. The apparatus according to claim 13 additionally comprising means for modifying the atmospheric environment within said housing interior to simulate natural atmospheric conditions that may actually occur at the location of a road or track.

16. The apparatus according to claim 15 wherein said means for modifying the atmospheric environment within said housing interior includes air flow generating means for generating a flow of air along said automobile within said housing interior.

17. The apparatus according to claim 15 wherein said means for modifying the atmospheric environment within said housing interior includes means for changing the temperature of air within said housing interior.

18. The apparatus according to claim 15 wherein said means for modifying the atmospheric environment within said housing interior includes means for changing the moisture content of air within said housing interior.

19. The apparatus according to claim 15 wherein said means for modifying the atmospheric environment within said housing interior includes means for changing the pressure of air within said housing interior.

20. The apparatus according to claim 1 wherein said control means includes a control processing unit programmed for simulating conditions of at least one actual automobile race track.

21. The apparatus according to claim 1 additionally comprising visual display means for providing a constantly changing display of a road or race track as would be visually perceived by an individual actually driving said automobile on the road or race track.

22. The apparatus according to claim 1 wherein said force applicator means comprises frame attachment means for attachment to the frame of said automobile and prime mover means for moving said frame attachment means.

23. Apparatus for testing and evaluating the performance of an automobile including a frame and wheel shafts under simulated road or race track and environmental conditions with the automobile not being supported by tires, said apparatus comprising, in combination:

a plurality of torque applicators for attachment to wheel shafts of an automobile to support the automobile by said wheel shafts when attached thereto and independently apply torque forces to said wheel shafts;

movable support means supporting said torque applicators and independently movable in up and down directions during testing and evaluation of said automobile to simulate road or race track surface conditions;

force applicator means for connection to said automobile at a location spaced from said wheel shafts to apply forces to said automobile;

a portable housing defining a housing interior for accommodating said automobile during test and evaluation thereof;

environment modifying means for varying the atmospheric environment within said housing interior; and

control means operatively associated with said torque applicators and said force applicator means for selectively varying the torque forces applied by said torque applicators to said wheel shafts and for varying the forces applied to said automobile at said location by said force applicator means, said control means further being operatively associated with said environment modifying means for changing the atmospheric environment within said housing interior to simulate natural atmospheric conditions that may actually occur at a road or race track.