Apparatus and methods related to coolant diverter valves
AssigneePerkins Engines Company Limited
InventorsSiddharth Gharpure, Matthieu Guttinger
Life of this patent
Estimating the term…
Abstract
A method and apparatus for fault detection of a coolant diverter valve. The coolant diverter valve is arranged in a coolant system to control flow of coolant from a coolant reservoir to a diesel exhaust fluid tank. At least a first sensor is provided for measuring the pressure and/or temperature of the coolant. During operation of the coolant diverter valve, as required from time to time, the coolant diverter valve is commanded to open by energising the coolant diverter valve and commanded to close by de-energising the coolant diverter valve. Based on readings from the first sensor a controller can determine if the coolant diverter valve has failed to close when the coolant diverter valve is de-energised.
Claims20
A method of fault detection of a coolant diverter valve, the method comprising:
- arranging the coolant diverter valve in a coolant system to control flow of coolant from a coolant reservoir to a diesel exhaust fluid tank;
- providing a first sensor for measuring the pressure and/or temperature of the coolant;
- operating the coolant diverter valve by, as required from time to time, commanding the coolant diverter valve to open by energising the coolant diverter valve and commanding the coolant diverter valve to close by de-energising the coolant diverter valve;
- and
- based on readings from the first sensor determining if the coolant diverter valve has failed to close when the coolant diverter valve is de-energised.
Apparatus for controlling the temperature of diesel exhaust fluid in a diesel exhaust fluid tank, the apparatus comprising:
- a coolant reservoir containing coolant;
- a diesel exhaust fluid tank for holding an aqueous urea solution for injection into an exhaust system;
- a coolant diverter valve;
- coolant lines for circulating the coolant from the coolant reservoir via the coolant diverter valve and the diesel exhaust fluid tank and back to the coolant reservoir;
- a first sensor for measuring the pressure and/or temperature of the coolant;
- and
- a controller configured to:
- command the coolant diverter valve to open by energising the coolant diverter valve and command the coolant diverter valve to close by de-energising the coolant diverter valve;
- receive readings from the first sensor;
- and
- when the coolant diverter valve is commanded to close, based on the readings from the first sensor, determine if the coolant diverter valve has failed to close.
Apparatus for controlling the temperature of diesel exhaust fluid in a diesel exhaust fluid tank, the apparatus comprising:
- a coolant reservoir containing coolant;
- a diesel exhaust fluid tank for holding an aqueous urea solution for injection into an exhaust system;
- a coolant diverter valve comprising a valve element movable by a solenoid armature;
- coolant lines for circulating the coolant from the coolant reservoir via the coolant diverter valve and the diesel exhaust fluid tank and back to the coolant reservoir;
- a controller configured to:
- command the coolant diverter valve to open by energising the coolant diverter valve and command the coolant diverter valve to close by de-energising the coolant diverter valve;
- and
- when the coolant diverter valve is commanded to close, based on detecting a location of the solenoid armature, determine if the coolant diverter valve has failed to close.
Dependencies are inferred from the claim text.