| 摘要 |
The disclosure describes a chassis dynamometer in combination with control means comprising an amplifier, respective inputs of which are fed to a speed signal dependent on the speed of rotation of the rollers of the dynamometer and to a reference signal. The output of the amplifier is selectively fed either to means controlling the braking torque of the dynamometer, the arrangement being such that a negative feed back loop is completed, or alternatively to the input of a store, from the output of which the reference signal is derived, so as to maintain the reference signal at a value corresponding to the speed of rotation of the rollers.
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