Exhaust energy recovery system for combustion engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02G-001/00
F02B-033/44
F01N-005/04
F01N-005/00
F01C-001/02
F01C-001/00
출원번호
US-0279859
(2002-10-25)
우선권정보
JP-2001-337349(2001-11-02)
발명자
/ 주소
Ogawa,Masahiro
Shimokawa,Yukio
출원인 / 주소
Toyota Jidosha Kabushiki Kaisha
대리인 / 주소
Kenyon &
인용정보
피인용 횟수 :
6인용 특허 :
9
초록▼
An exhaust energy recovery system for a combustion engine having an exhaust passage has a displacement expansion device and a generator. The expansion device is located in the exhaust passage. Exhaust gas is introduced into the expansion device. The expansion device has an expansion chamber the vol
An exhaust energy recovery system for a combustion engine having an exhaust passage has a displacement expansion device and a generator. The expansion device is located in the exhaust passage. Exhaust gas is introduced into the expansion device. The expansion device has an expansion chamber the volume of which varies in accordance with the pressure of exhaust gas and generates power in accordance with the volume variation of the expansion chamber. The generator generates electricity in accordance with the power generated by the expansion device. This efficiently recovers exhaust gas and effectively uses the recovered exhaust gas.
대표청구항▼
What is claimed is: 1. An exhaust energy recovery system for a combustion engine having an exhaust passage, the exhaust energy recovery system comprising: a displacement expansion device located in the exhaust passage, wherein the exhaust gas is introduced into the expansion device, the expansion d
What is claimed is: 1. An exhaust energy recovery system for a combustion engine having an exhaust passage, the exhaust energy recovery system comprising: a displacement expansion device located in the exhaust passage, wherein the exhaust gas is introduced into the expansion device, the expansion device has an expansion chamber, and the volume of the expansion chamber varies in accordance with the pressure of the exhaust gas and generates power in accordance with the volume variation of the expansion chamber; a generator for generating electricity in accordance with the power generated by the expansion device; and a catalytic converter located in the exhaust passage, the expansion device being located downstream of the catalytic converter in the exhaust passage. 2. The exhaust energy recovery system according to claim 1, wherein the expansion device is scroll type. 3. The exhaust energy recovery system according to claim 1, wherein the expansion device serves as a muffler to reduce exhaust sound. 4. The exhaust energy recovery system according to claim 1, further comprising a relief valve, wherein, when the pressure in the exhaust passage is greater than or equal to a predetermined value, the relief valve permits exhaust gas to flow without going through the expansion device. 5. The exhaust energy recovery system according to claim 1, further comprising a pressure-regulating valve for regulating the flow rate of exhaust gas introduced into the expansion device. 6. The exhaust energy recovery system according to claim 1, wherein the exhaust passage includes a first branch and a second branch, wherein the first branch permits exhaust gas to flow via the expansion device, and the second branch permits exhaust gas to flow without going through the expansion device, and wherein a muffler for reducing exhaust sound is located in the second branch only 7. The exhaust energy recovery system according to claim 1, wherein the expansion device is one of two expansion devices, and wherein a rotor of the generator and the expansion devices are coupled serially such that the rotor is located between the expansion devices. 8. The exhaust energy recovery system according to claim 7, wherein the timing of each expansion device at which exhaust gas is exhausted differs from each other. 9. The exhaust energy recovery system according to claim 7, wherein the combustion engine is an engine having several cylinders, and exhaust gas of cylinders that have small exhaust interference with each other is sent to each expansion device. 10. The exhaust energy recovery system according to claim 1, wherein the generator is driven as an electric motor to forcibly drive the expansion device during a predetermined period. 11. The exhaust energy recovery system according to claim 1, wherein the expansion device includes a space communicated with the expansion chamber and a movable member, which moves in accordance with the pressure in the expansion chamber, wherein, when the pressure in the expansion chamber is greater than or equal to a predetermined value, the movable member moves in a direction to reduce the space. 12. The exhaust energy recovery system according to claim 1, wherein the expansion device includes a movable scroll having a base plate, and a groove is radially formed on the base plate about the axis of the base plate. 13. The exhaust energy recovery system according to claim 1, wherein the expansion device includes a movable scroll, and the movable scroll has a base plate and volute portion, which is formed on the base plate, wherein the volute portion has a proximal end portion and a distal end portion with respect to the base plate, and a groove is formed on the distal end. 14. The exhaust energy recovery system according to claim 13, wherein the groove is one of a plurality of grooves. 15. An exhaust energy recovery system for a combustion engine having an exhaust passage, the exhaust energy recovery system comprising: a scroll type expansion device located in the exhaust passage, wherein the exhaust gas is introduced into the scroll type expansion device, the scroll type expansion device has an expansion chamber, and the volume of the expansion chamber varies in accordance with the pressure of the exhaust gas and generates power in accordance with the volume variation of the expansion chamber; a generator for generating electricity in accordance with the power generated by the the scroll type expansion device; and a relief valve for permitting flow of exhaust gas when the pressure in the exhaust passage is greater than or equal to a predetermined value; and a catalytic converter located in the exhaust passage, the scroll type expansion device being located downstream of the catalytic converter in the exhaust passage, wherein the expansion device includes a space comuunicated with the expansion chamber, wherein, when the pressure in the expansion chamber is greater than or equal to a predetermined value, the movable member moves in a direction to reduce the space.
Durrett, Russell P.; Gopalakrishnan, Venkatesh; Najt, Paul M., Internal combustion engine with emission treatment interposed between two expansion phases.
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