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Rankine Cycle System For Vehicle

A cycle system and vehicle technology, applied in the field of Rankine cycle systems for vehicles, can solve problems such as the reduction of heat recovery efficiency, and achieve the effects of suppressing the decline in efficiency, temperature, and heat dissipation.

Active Publication Date: 2017-06-23
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the amount of steam sent to the expander is reduced, so the heat recovery efficiency of the system is reduced
In the prior art mentioned above, there is no investigation for suppressing the temperature drop of the gas-liquid separator, and there is still room for improvement in improving the heat recovery efficiency of the Rankine cycle system

Method used

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  • Rankine Cycle System For Vehicle
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Examples

Experimental program
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Effect test

Embodiment approach 1

[0076] 1. Structure of the Rankine cycle system

[0077] figure 1 It is a diagram showing the configuration of the Rankine cycle system 100 according to the first embodiment. The Rankine cycle system 100 of Embodiment 1 is configured as a Rankine cycle system for a vehicle that includes an internal combustion engine (engine) 10 and is mounted on a vehicle. The type and structure of the engine 10 are not limited. However, in the cylinder block and the cylinder head of the engine 10, a refrigerant passage 12 through which the refrigerant circulating in the engine 10 flows is formed. The refrigerant flow path 12 includes a water jacket surrounding the cylinder. Engine 10 is cooled by exchanging heat with the refrigerant flowing in refrigerant passage 12 . In this embodiment, water is used as the refrigerant.

[0078] The engine 10 is cooled by using waste heat of the engine 10 to boil the refrigerant flowing through the refrigerant passage 12 to vaporize part of the refriger...

Embodiment approach 2

[0106] Next, the Rankine cycle system 110 according to Embodiment 2 will be described. Figure 7 It is a schematic diagram for explaining the fixed structure of the gas-liquid separator 16 in the Rankine cycle system 110 of Embodiment 2. In addition, (A) of the figure shows the top view of the vehicle of this Rankine cycle system, and (B) of the figure shows the front view of the vehicle of the Rankine cycle system mounted on a vehicle. Moreover, in Figure 7 in, for with figure 2 Common components of the Rankine cycle system 100 according to Embodiment 1 shown are denoted by the same reference numerals.

[0107] In the Rankine cycle system 110 according to Embodiment 2, the gas-liquid separator 16 is arranged in a region above the exhaust side of the engine 10 and at a position overlapping the superheater 30 or the exhaust manifold 26 in a plan view of the vehicle. The gas-liquid separator 16 is fixed to the engine 10 via the brackets 4a, 4b. The brackets 4a, 4b are resp...

Embodiment approach 3

[0111] Next, the Rankine cycle system 120 according to Embodiment 3 will be described. The Rankine cycle system 120 according to the third embodiment is characterized in that the cylinder head 101 and the gas-liquid separator 160 are integrally formed. Figure 8 and Figure 9 It is a schematic diagram for explaining the fixed structure of the gas-liquid separator in the Rankine cycle system 120 of Embodiment 3. It should be noted, Figure 8 A diagram showing a state in which the gas-liquid separator 160 is integrated with the cylinder head 101 viewed from the exhaust side, Figure 9 A diagram showing a disassembled state of the gas-liquid separator 160 and the cylinder head 101 viewed from the intake side.

[0112] As shown in these figures, a refrigerant inlet port 161 is provided in the gas-liquid separator 160 . The inlet port 161 is used to guide the refrigerant led out from the refrigerant passage 12 of the engine 10 to the gas-liquid separator 160 . The inlet port 1...

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Abstract

A Rankine cycle system includes a boiler configured to apply waste heat to refrigerant circulating in an internal-combustion engine to vaporize the refrigerant; a gas-liquid separator configured to separate gas-liquid two-phase refrigerant, sent from the boiler, into gas phase fluid and liquid phase fluid; a superheater configured to superheat the gas phase fluid, sent from the gas-liquid separator, through heat exchange with exhaust gas of the internal-combustion engine; an expander configured to expand the gas phase fluid, passing through the superheater, to recover thermal energy, and a condenser configured to condense the gas phase fluid, passing through the expander, to return the gas phase fluid to liquid phase fluid. The gas-liquid separator is fixed to a cylinder head of the internal-combustion engine. It is preferable that the gas-liquid separator is configured to include a bracket, and is fixed to the cylinder head via the bracket.

Description

technical field [0001] The present invention relates to a Rankine cycle system for a vehicle, and more particularly to a mounting structure for mounting the Rankine cycle system on a vehicle. Background technique [0002] Patent Document 1 discloses a technique related to a Rankine cycle system mounted on a vehicle. In this Rankine cycle system, waste heat from the engine boils the liquid-phase fluid to change into a gas-phase fluid, expands the gas-phase fluid to perform work, and condenses the expanded gas-phase fluid to return to a liquid-phase fluid. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2015-94271 [0006] Patent Document 2: Japanese Patent Laid-Open No. 2002-316530 [0007] Patent Document 3: Japanese Patent Laid-Open No. 2011-189824 [0008] The problem to be solved by the invention [0009] When the Rankine cycle system is mounted on a mobile body such as a vehicle as in the above-menti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02G5/00F02G5/02F01K25/08
CPCF01K25/08F02G5/00F02G5/02F02G2254/15F01K23/065F01K23/10Y02E20/30Y02T10/12F05D2220/62H02K7/1823
Inventor 立野学
Owner TOYOTA JIDOSHA KK
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