INTERNAL COMBUSTION ENGINE CHARGE AIR COOLER PRECOOLER

• US 20120204555A1
• Filed: 02/15/2011
• Published: 08/16/2012
• Est. Priority Date: 02/15/2011
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Didelot, David R., Send, Douglas J., Dylhoff, Jonathan A., Wantschik, Paul A.
• Granted Patent: US 8,813,489 B2
• Time in Patent Office: Days
• US Class Current: 60/599
• CPC Class Codes: F02B 29/0443 Layout of the coolant or refrigerant circuit
• CPC Class Codes: F02B 29/0475 the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
• CPC Class Codes: F02M 26/05 High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
• CPC Class Codes: F02M 26/23 Layout, e.g. schematics
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A work machine having an air-breathing, fuel-consuming, liquid-cooled internal combustion (IC) engine and a turbocharger receiving combustion products from the IC engine and a compressor for pressurizing air to the IC engine. A primary heat exchanger is in fluid flow connection between the compressor and the IC engine and a secondary heat exchanger is in fluid flow connection between the compressor and the IC engine and is upstream of the primary heat exchanger. The secondary heat exchanger is an air-to-liquid heat exchanger and receives liquid coolant from the IC engine.

Claims

1. A power system comprising:

an air-breathing, fuel-consuming, liquid cooled internal combustion (IC) engine providing a rotatory power output and producing products of combustion;

at least one turbocharger having a turbine for receiving the products of combustion from said IC engine and a compressor driven by said turbine for pressurizing air for delivery to said IC engine;

a primary heat exchanger in fluid flow connection to and interspersed between said compressor and said IC engine; and

a secondary heat exchanger in fluid flow connection between said compressor and said IC engine and interposed upstream of said primary heat exchanger, said secondary heat exchanger being an air-to-liquid heat exchanger and receiving liquid coolant from said IC engine.

2. The power system as claimed in claim 1, wherein said primary heat exchanger is an air-to-air heat exchanger.

3. The power system as claimed in claim 1, further comprising a thermostat for controlling flow of liquid from said engine through said secondary heat exchanger.

4. The power system as claimed in claim 3, wherein the thermostat is adjacent said secondary heat exchanger.

5. The power system as claimed in claim 1, wherein said engine is electronically controlled and the flow of liquid coolant from the IC engine through said secondary heat exchanger is controlled electronically.

6. The power system as claimed in claim 1, wherein a bleed flow is provided for liquid from said engine through said secondary heat exchanger for increasing the responsiveness of said thermostat.

7. The power system as claimed in claim 1, further comprising a selective bypass around said secondary heat exchanger to control the amount of cooling during selected operating conditions.

8. The power system as claimed in claim 1, further comprising a first pump connected to and driven by said IC engine for liquid cooling thereof and a second liquid pump connected to and driven by said engine for delivering liquid to said secondary heat exchanger.

9. The power system as claimed in claim 8, wherein said second liquid pump pumps coolant from said engine to a heat generating component and said secondary heat exchanger is in parallel flow connection with said component and is fed with liquid from the same pump.

10. A work machine comprising:

a frame;

an operator cab;

a cab heater;

an air-breathing, fuel-consuming, liquid-cooled internal combustion (IC) engine mounted in said frame and providing a rotary output and producing products of combustion;

at least one turbocharger having a turbine for receiving the products of combustion from said IC engine and a compressor driven by said turbine for pressurizing air for delivery to said IC engine;

a primary heat exchanger in fluid flow connection to and interposed between said compressor and said IC engine; and

a secondary heat exchanger in fluid flow connection between said compressor and said IC engine and interposed upstream of said primary heat exchanger, said secondary heat exchanger and said cab heater being air-to-liquid heat exchangers and both receiving liquid coolant from said IC engine.

11. The work machine of claim 10, wherein the primary heat exchanger is an air-to-air heat exchanger.

12. The work machine of claim 10, further comprising a thermostat for controlling flow through said secondary heat exchanger.

13. The work machine of claim 12, wherein the thermostat is adjacent said secondary heat exchanger.

14. The work machine of claim 10, wherein the engine is electronically controlled and the liquid coolant flow through said secondary heat exchanger is electronically controlled.

15. The work machine of claim 10, wherein the said secondary heat exchanger has a bleed flow therethrough to increase responsiveness to changes in temperature.

16. The work machine as claimed in claim 10, further comprising a selective bypass flow for air around said secondary heat exchanger during selected engine operating conditions.

17. The work machine as claimed in claim 10, wherein said IC engine has a coolant pump in liquid connection with said engine to cool the components thereof and said work machine has a separate liquid pump for delivering liquid coolant from said IC engine to said secondary heat exchanger.

18. The work machine as claimed in claim 17, further comprising accessory components requiring cooling and being fed by the pump for said secondary heat exchanger, said secondary heat exchanger being in liquid coolant parallel flow connection with said auxiliary components.