Method to determine the operating resistance of an electrical harness connecting an ECU to a solenoid controlled valve
AssigneeDelphi Technologies IP Limited
InventorsPatrick Daniel, Pascal Bellamy
Life of this patent
Estimating the term…
Abstract
A method of determining the electrical resistance of an actual harness connecting the Engine Control Unit (ECU) to a solenoid valve. The method includes providing a dummy harness connected at one end to the ECU and at the other end to a terminal connection in the vicinity of the solenoid valve. The method also includes determining the estimated RMS current through the actual harness and passing a current through the dummy harness such that the heat exchange to the environment is substantially the same as the actual harness. Power consumption of the dummy harness is measured and resistance of the actual harness is determined from estimated RMS and power consumption of the dummy harness.
Claims10
A method of determining an electrical resistance of an actual harness, in an engine system, said actual harness connecting an Engine Control Unit (ECU) to a solenoid operated valve, said method comprising:
- a) providing, in addition to the actual harness, a dummy harness connected at one end to the ECU and at another end to a terminal connection in the vicinity of the solenoid operated valve;
- b) determining an estimated RMS current through the actual harness;
- c) passing a current through the dummy harness such that heat exchange to the environment is substantially the same as that in the actual harness;
- d) measuring power consumption in the dummy harness;
- e) determining a resistance of the actual harness from the results from steps b) and d).
Dependencies are inferred from the claim text.