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Vehicle exhaust heat recovery system and method of managing exhaust heat

A technology for waste heat recovery and vehicles, which is applied to vehicle components, engine starting, engine lubrication, etc., and can solve problems affecting fuel economy, etc.

Inactive Publication Date: 2011-04-27
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using an electric motor / generator to drive a heater on a hybrid vehicle can adversely affect fuel economy

Method used

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  • Vehicle exhaust heat recovery system and method of managing exhaust heat
  • Vehicle exhaust heat recovery system and method of managing exhaust heat
  • Vehicle exhaust heat recovery system and method of managing exhaust heat

Examples

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Embodiment Construction

[0052] Referring to the drawings, wherein like reference numerals refer to like parts throughout the several views, figure 1 A vehicle 10 is shown having an engine 12 (labeled E) for propelling the vehicle 10, a transmission 14 (labeled T) operatively connected to the engine 12, and a transmission 14 (labeled T) for heating the passenger compartment (shown in dashed lines at 18 Shown) passenger compartment heater 16 (marked as H).

[0053] Engine 10 is an internal combustion engine of the gasoline or diesel type and produces exhaust gases in an exhaust system including an exhaust manifold 20 and an exhaust pipe 22 extending therefrom. The relatively hot exhaust gases exit the vehicle via exhaust pipe 22 . An exhaust heat recovery system (EHRS) 24 is provided to selectively capture a portion of the waste heat to provide heat to the passenger compartment 16 , transmission 14 , and engine 12 . The EHRS 24 includes an exhaust heat recovery device (EHRD) 26 located within the exh...

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PUM

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Abstract

An exhaust heat recovery system (EHRS) for a vehicle is operable to direct exhaust heat to a vehicle transmission under certain operating conditions. In some embodiments, the EHRS may also direct exhaust heat to a heater for vehicle passenger compartment. Preferably, the EHRS is controllable to manage available exhaust heat according to vehicle operating conditions, by prioritizing the heat flow among the engine, the transmission, and the vehicle heater. The EHRS may also operate in a bypass mode during which exhaust heat is not directed to the engine, the transmission or the vehicle heater. A method of managing exhaust heat recovery on a vehicle having an EHRS is also provided.

Description

technical field [0001] The present invention relates to a waste heat recovery system for a vehicle and a method of managing waste heat. Background technique [0002] Rapid warming of the engine fluid, engine oil, and transmission fluid is important for fuel economy during cold starts (ie, when the vehicle has not been running and the engine and transmission are cold). Engine warming is especially challenging since diesel and hybrid applications burn less fuel. Proper passenger compartment heating performance is also essential for passenger comfort. Using an electric motor / generator to drive a heater on a hybrid vehicle can adversely affect fuel economy. Contents of the invention [0003] An exhaust heat recovery system (EHRS) for a vehicle operable to direct exhaust heat to a vehicle transmission under certain operating conditions is provided. In certain embodiments, the EHRS may also direct waste heat to a heater for the vehicle passenger compartment. Preferably, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02G5/02B60H1/18F16N39/04F16H57/04F01M5/02F02N19/04
CPCY02T10/16F01N5/02B60H1/025Y02T10/12
Inventor G·P·普赖尔G·M·克莱波尔
Owner GM GLOBAL TECH OPERATIONS LLC
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