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Quick connect diagnostic apparatus and method for a vehicle cooling system

  • US 5,526,871 A
  • Filed: 02/08/1994
  • Issued: 06/18/1996
  • Est. Priority Date: 02/08/1994
  • Status: Expired due to Fees
First Claim
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1. A quick connect diagnostic apparatus for analyzing the cooling system of a vehicle engine including a radiator, a thermostat coupled to the engine, a heater core and various liquid hoses connecting the components of the cooling system, the diagnostic apparatus comprising:

  • first, second and third temperature sensors, the first sensor configured to attach to a liquid hose containing cooling liquid from the engine to measure the temperature of the liquid in the engine and generate a first signal, the second sensor configured to attach to an input liquid hose to the radiator to measure the temperature of the liquid entering the radiator and generate a second signal, and the third sensor configured to attach to an output liquid hose from the radiator to measure the temperature of the liquid leaving the radiator and generate a third signal;

    an analyzer for analyzing the measured temperatures, each of said sensors being electrically coupled to the analyzer, the analyzer comparing the first signal with the second signal to generate a thermostat output signal, comparing the second signal with the third signal to generate a radiator output signal, and using the first signal to generate an engine temperature output signal;

    output circuitry electrically coupled to the analyzer to receive the output signals and provide a humanly perceptible output denoting the engine temperature and the operation of the cooling system.

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