Jack F Wilson

US Patent:

51540762, Oct 13, 1992

Filed:

Feb 8, 1991

Appl. No.:

7/652950

Inventors:

Jack A. Wilson - West Covina CA
Hubert M. Walker - San Marino CA

Assignee:

Clayton Industries - El Monte CA

International Classification:

G01M 1500

US Classification:

73117

Abstract:

A dynamometer for simulating the inertia and road load forces for motor vehicles is described. The dynamometer includes a moveable frame on which is mounted one or more rolls for engaging the driven wheel or wheels of the test vehicle, a power supplying and/or absorbing unit such as an electric motor and one or more mechanical flywheels. The moveable frame is pivotally mounted about the axis of rotation of the rolls. A force transducer is disposed between a point on the moveable frame spaced from the roll axis and a stationary surface for measuring a force which includes as components thereof the roll/wheel interface force and a force associated with the roll, motor and flywheel parasitic losses. A velocity transducer measures the roll speed. A controller responsive to signals from the force and velocity transducers and to the selected simulated inertia and road load controls the motor to supply power to or absorb power from the rolls so that the force applied to or received from the vehicle wheels is proportional to the selected simulated inertia and road load.

US Patent:

39824284, Sep 28, 1976

Filed:

Apr 14, 1975

Appl. No.:

5/567993

Inventors:

Jack A. Wilson - West Covina CA

Assignee:

Clayton Manufacturing Company - El Monte CA

International Classification:

G01L 528

US Classification:

73126

Abstract:

Wheel-contact rollers for a vehicle test-bed have helical grooves formed in their outer surfaces to improve start-up friction by providing fast removal of water and other foreign materials from tire surfaces. The grooves are preferably formed by a thread-cutting or thread-forming process. The helical grooves should be equally-sloped left-hand and right-hand threads, in order to provide balanced side-to-side forces on the tire; however, the opposing left and right hand slopes may be formed on separate rollers, i. e. , one slope on the left wheel roller and the opposite slope on the right wheel roller.