Exhaust energy recovery system for combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasahiro Ogawa, Yukio Shimokawa
Life of this patent
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Abstract
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.
Claims15
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.
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.
Dependencies are inferred from the claim text.