Turbocharged engine cooling system with two two-pass radiators
AssigneeCaterpillar Inc.
InventorsMichael D. Betz, Jiubo Ma
Life of this patent
Estimating the term…
Abstract
An engine cooling system includes a primary two-pass radiator, a jacket water pump pumping coolant from the primary radiator to the engine, and a secondary radiator receiving coolant from the primary radiator in parallel with the engine. An after cooler for cooling engine charge air from a turbo charger receives coolant from the secondary radiator, and water is circulated to the after cooler by a SCAC pump. A shunt tank is connected to the suction of the jacket water pump to establish a static pressure head thereon, to ensure that the jacket water pump has sufficient suction pressure despite relatively high coolant head loss through the two-pass primary radiator.
Claims20
A cooling system for an engine, comprising:
- at least a first radiator having at least one coolant outlet;
- at least a second radiator having at least one coolant inlet in communication with the coolant outlet of the first radiator, the second radiator also having at least one coolant outlet, wherein coolant is passed in series from the first radiator to the second radiator;
- at least one aftercooler having at least one coolant inlet in communication with the coolant outlet of the second radiator;
- at least one pump communicating with the first radiator for pumping coolant to the engine;
- and
- at least one shunt tank disposed above the pump, a fluid line directly attached to both the tank and a suction of the pump such that the tank provides a static pressure head to the suction of the pump.
A cooling system for an engine of a vehicle, comprising:
- a first radiator;
- a JW pump discharging coolant from the first radiator to the engine;
- a second radiator in parallel with the engine and receiving coolant from the first radiator;
- and
- an aftercooler in series with the second radiator for receiving coolant therefrom, the aftercooler discharging coolant back to the first radiator;
- and
- at least one shunt tank disposed above the JW pump, a fluid line directly attached to both the tank and a suction of the pump such that the tank provides a static pressure head to the suction of the pump.
A method for cooling an engine and an aftercooler cooling charge air for the engine, comprising:
- pumping coolant from a primary radiator to the engine;
- causing coolant from the primary radiator to flow in series through a secondary radiator and the aftercooler to cool charge air from a turbocharger;
- and
- providing a shunt tank in direct fluid communication with a suction of a pump to provide a static pressure head to the suction of the pump.
Dependencies are inferred from the claim text.