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Start-stop control method for vehicle organic Rankine cycle waste heat recovery device

A technology of waste heat recovery device and Rankine cycle, which is applied in the direction of steam engine device, mechanical equipment, heat input, etc., can solve the problem of lack of large-scale popularization and application, lack of effective method for starting and stopping judgment, and fluctuation of exhaust waste heat energy parameters of automobile engines. Major and other issues

Active Publication Date: 2021-12-07
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the drastic changes in the working conditions of the vehicle during actual driving, the exhaust waste heat energy parameters of the vehicle engine fluctuate greatly, which poses a great challenge to the control of the organic Rankine cycle waste heat recovery device. The organic Rankine cycle waste heat recovery technology for domestic and foreign vehicles They are all in the preliminary research stage, and there is no large-scale promotion and application for the time being.
One of the main problems restricting the application of organic Rankine cycle waste heat recovery technology in the automotive industry is that there is still a lack of effective methods for judging the start and stop of vehicle organic Rankine cycle waste heat recovery devices under transient conditions

Method used

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  • Start-stop control method for vehicle organic Rankine cycle waste heat recovery device
  • Start-stop control method for vehicle organic Rankine cycle waste heat recovery device
  • Start-stop control method for vehicle organic Rankine cycle waste heat recovery device

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides an organic Rankine cycle waste heat recovery device for a vehicle engine 11, which includes an engine system, an organic Rankine cycle system, a power transmission system, and a control system.

[0035] Such as figure 1 As shown, the engine system includes an engine 11, a compressor 12, a turbine 13, an intake pipeline, an exhaust pipeline, an engine power output device 15, an exhaust electronically controlled three-way valve 14 and an exhaust heat exchanger 21; the intake pipeline It is connected to the intake end of the compressor 12, the exhaust end of the compressor 12 is connected to the engine 11, the engine 11 is connected to the intake end of the turbine 13, the exhaust end of the turbine 13 is connected to the intake end of the exhaust electronically controlled three-way valve 14, and the exhaust The exhaust end c of the electronically controlled three-way valve 14 is connected to the exhaust pipeline, the exhaust end d of the electroni...

Embodiment 2

[0046] This embodiment provides a start-stop control method of an organic Rankine cycle waste heat recovery device for a vehicle, which is used to control the start and stop of the organic Rankine cycle waste heat recovery device for a vehicle engine in Example 1 under transient working conditions; specifically Specifically, the control method first uses the average value calculation module 411 to calculate the average temperature of the exhaust gas of the engine 11 within a time interval, and transmits the calculated average value signal to the temperature judgment module 413; then, uses the timer module 412 to record the average temperature Time exceeding the preset temperature threshold; finally, the temperature judging module 413, time judging module 414 and comprehensive judging module 415 control the start and stop of the waste heat recovery device according to the average temperature and the time when the average temperature exceeds the preset temperature threshold.

[0...

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Abstract

The invention belongs to the technical field of engines, and discloses a start-stop control method for a vehicle organic Rankine cycle waste heat recovery device. According to the method, the start-stop of the waste heat recovery device is controlled according to average temperature of engine exhaust and the time when the average temperature exceeds a preset temperature threshold. The vehicle organic Rankine cycle waste heat recovery device can normally operate under the transient cycle working condition to achieve the purpose of recovering waste heat energy of an engine, and the application of the vehicle organic Rankine cycle waste heat recovery technology under the transient working condition is met.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a start-stop control method of an organic Rankine cycle waste heat recovery device for vehicles. Background technique [0002] Generally, the effective power output by the engine only accounts for about 20%-40% of the total heat of fuel combustion, and the remaining heat energy is mainly transferred to the atmosphere through the exhaust gas and cooling medium (cooling water, engine oil heat dissipation, etc.). It can be seen from this that for vehicle engines, the waste heat energy has great potential for energy saving, and the waste heat energy recovery and utilization technology has a wide application space. At present, engine waste heat energy utilization technology mainly focuses on supercharging, waste heat refrigeration, waste heat heating, waste heat power generation and improving fuel combustion performance. Among the various technical solutions for waste heat utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K13/02F02G5/02
CPCF01K13/02F02G5/02F02G2254/15Y02E20/30Y02T10/12
Inventor 孙爱洲王鹏李子非袁宝良金华玉李丽
Owner FAW JIEFANG AUTOMOTIVE CO