[특허]Exhaust gas recirculation in internal combustion engines

Exhaust gas recirculation in internal combustion engines 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-025/07 F01N-003/02
출원번호	US-0768985 (1996-12-17)
발명자 / 주소	Paas Norbert
출원인 / 주소	Dry Systems Technologies
대리인 / 주소	Dahl
인용정보	피인용 횟수 : 73 인용 특허 : 0

초록 ▼

An exhaust gas recirculation system for an internal combustion engine may comprise an EGR valve having an inlet end connected to the exhaust manifold of the engine and an outlet end connected to the inlet end of a heat exchanger. The outlet end of the heat exchanger is in turn connected to the inlet end of a filter assembly, the outlet end of which is connected to the intake manifold of the engine. A valve control system connected to the EGR valve selectively opens and closes the valve to direct cooled and filtered exhaust gases into the intake manifold of the engine. An intermittent water injection system may be connected to the inlet end of the heat exchanger and may be used to inject a predetermined quantity of water into the inlet of the heat exchanger at periodic intervals to remove accumulated soot deposits from the interior surfaces of the heat exchanger.

대표청구항 ▼

[ What is claimed is:] [1.] An exhaust gas recirculation system for an internal combustion engine, the internal combustion engine including an intake manifold and an exhaust manifold, comprising:a first valve having an inlet end and an outlet end, the inlet end being connected to the exhaust manifold;a heat exchanger having an inlet end and an outlet end, the inlet end of said heat exchanger being connected to the outlet end of said first valve;a filter having an inlet end and an outlet end, the inlet end of said filter being connected to the outlet end of said heat exchanger, and the outlet end being connected to the intake manifold of the engine;a valve control system connected to said first valve for selectively opening and closing said first valve, wherein cooled and filtered exhaust gases are recirculated into the intake manifold when said first valve is open; andan intermittent water injection system connected at about the inlet end of said heat exchanger for injecting into exhaust gases from the engine a predetermined quantity of water at periodic time intervals, wherein the predetermined quantity of water flashes to steam and creates a pressure pulse which dislodges solid particulate matter that has accumulated within said heat exchanger.

이 특허를 인용한 특허 (73)

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Stewart, Gregory E., Engine exhaust heat exchanger.
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IPC	Description
A	생활필수품
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Exhaust gas recirculation in internal combustion engines 원문보기

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Exhaust gas recirculation in internal combustion engines 원문보기

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연구과제 타임라인

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