EXPERIMENTAL TESTING OF NEW FRICTION MATERIALS FOR AUTOMATIC TRANSMISSION

H. W. SCHULTZ

doi:10.4271/550112

1955-01-01

EXPERIMENTAL TESTING OF NEW FRICTION MATERIALS FOR AUTOMATIC TRANSMISSION 550112

As data obtained from experimental testing of friction materials operating in oil have long been a subject of controversy between transmission engineers, we present a brief description of several test machines and associate instrumentation, in general use today.

Namely: A constant drive - constant torque unit, an inertia type dynamometer. (This unit is most generally used), and finally, a new design which operates both the drive and driven members simulating most any transmission operation desired. Here, the same fundamental instrumentation is used as that for a test transmission.

Regardless of the unit, most of the following data is recorded depending on flexibility and instrumentation:

1.
Torque
2.
Deceleration or acceleration
3.
Temperatures of oil
4.
Operating pressures
5.
Speed, plus various other data as requested.

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EXPERIMENTAL TESTING OF NEW FRICTION MATERIALS FOR AUTOMATIC TRANSMISSION 550112

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