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Intelligent Auxiliary Water Heater Pump Control for Automotive Applications

IP.com Disclosure Number: IPCOM000138732D
Publication Date: 2006-Jul-31
Document File: 2 page(s) / 19K

Publishing Venue

The IP.com Prior Art Database

Abstract

Certain vehicle applications require the use of an additional water pump to circulate coolant from the engine to the interior climate control heater core.

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Intelligent Auxiliary Water Heater Pump Control for Automotive Applications

Certain vehicle applications require the use of an additional water pump to circulate coolant from the engine to the interior climate control heater core. The need for an additional, auxiliary heater pump can be used to supplement the existing engine based heater pump, replace the engine pump entirely, or to permit coolant flow when the engine pump is off, which can happen if the engine is not operating. This auxiliary heater pump uses energy, usually electricity, to operate. Use of the auxiliary heater pump when not needed both consumes additional energy, but can also wear out the pump before the end of the useful vehicle life. Further, running the pump when not needed can contribute to cabin warming when it is not required, forcing a larger load on the air conditioning system. Cabin warming can occur when the heater core heat "leaks" into the climate control system during the use of air conditioning. Elimination of the heater pump reduces the amount of available heat that could flow into the cabin.

A method below is proposed to add "smart" operation of the auxiliary heater pump in order to improve energy consumption and pump life.

Method:

The solution includes the following "smart" functions for the electric, auxiliary heater pump. These are particularly useful for a hybrid electric vehicle, but can be applicable to a conventional vehicle as well.

1. Shut off the heater pump off when climate control i...

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