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US 8,006,675 B2Granted
Diesel fuel cooling system and control strategy
AssigneeFord Global Technologies, LLC
InventorsTimothy Chyo, Peter Kanefsky, Carlos Armesto, Anil Shah, Douglas Schoen
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Abstract
A method is described for cooling fuel for a diesel engine system with a common rail fuel injection system having a coolant pump and a fan. The method comprises passing a returning fuel from the engine through a fuel to coolant heat exchange system to cool the fuel, and adjusting the cooling of the fuel by controlling the coolant pump and/or the engine cooling fan.
Claims9
A fuel cooling system for a diesel internal combustion engine system having a set of engine cylinders, a fuel storage tank, and a common rail fuel injection system comprises:
- a fuel distribution circuit for carrying fuel from the fuel storage tank to the engine cylinders;
- a fuel recycling circuit for recycling un-injected fuel;
- a temperature sensor for sensing fuel temperature;
- a fuel to coolant heat exchange system for cooling the fuel wherein the fuel to coolant heat exchange system comprises a coolant reservoir, an electric coolant pump, and a heat exchange manifold;
- a mechanism for controlling the electric coolant pump operation;
- an air to coolant heat exchange system coupled to the fuel to coolant heat exchange system for cooling the coolant in the fuel to coolant heat exchange system wherein the air to coolant heat exchange system is exposed to vehicle ram air and includes a heat exchange manifold and a cooling fan;
- and
- a mechanism for controlling the cooling fan.
5 more elements
Dependencies are inferred from the claim text.