| 摘要 |
A control system for a vehicle compartment cooler has been provided wherein the cooler is driven by an internal combustion engine through a magnetic clutch having a detector for providing an indication of the compartment temperature. The improvement includes, a revolution detecting means and electrical circuits associated therewith, responsive to the ignition coil for producing a train of signal pulses indicative of number of revolutions of the engine. Circuit means responsive to temperature detector and the revolution detector outputs, produces a control signal when its respective inputs are such that they respectively indicate that the engine speed and the compartment temperature have exceeded selected limits. A switching circuit is provided in order to engage the magnetic clutch for driving the cooler in response to said output control signal.
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