[특허]Variable valve timing operated engine

Variable valve timing operated engine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01L-001/34
출원번호	US-0850471 (1992-03-11)
발명자 / 주소	Simko Aladar O. (Dearborn Heights MI) Stein Robert A. (Northville MI)
출원인 / 주소	Ford Motor Company (Dearborn MI 02)
인용정보	피인용 횟수 : 44 인용 특허 : 0

초록 ▼

A method of operating an automotive-type engine by independently phase shifting the intake and exhaust valves to provide at part loads late closing of the intake valve during the compression stroke to reduce pumping losses, with a delayed overlap between the opening of the intake valve and closing of the exhaust valve controlled to reduce HC and control NOx by providing a desired level internal EGR by the backflow of gases into the cylinder and intake port, and late opening of the exhaust valve during the expansion stroke to increase expansion work; also a low overlap at idle for improved stability, and optimizing valve timings at wide open throttle for increased torque and power output.

대표청구항 ▼

A method of operating an automotive-type internal combustion engine to control the emission of unburned hydrocarbons and nitrogen oxides while providing efficient engine operation, stable idle, and increased torque and power output, consisting of: independently varying the openings and closings of the engine intake and exhaust valves from fixed valve lift and duration valve event timing schedules to provide the most efficient speed and torque operation accompanied by optimum fuel economy; and comprising the steps of: for engine idle speed operation, providing a small overlap between the opening of the intake valve during the piston exhaust stroke and the closing of the exhaust valve during the piston intake stroke to minimize the amount of residual gas in the engine combustion chamber to increase fuel economy while concurrently providing a minimal backflow of gas into the intake manifold to promote mixing of the air/fuel charge for better combustion stability; and, for part load and moderate engine accelerating operating conditions, shifting the intake and exhaust valve timing events by significantly delaying the intake valve opening and the exhaust valve closing from their normal timing schedules and also to provide a greater overlap between the opening of the intake valve and the closing of the exhaust valve than at idle to provide a greater volume of internal exhaust gas recirculation (EGR) into the cylinder and intake port to reduce NOx and HC emissions, the crank angle degree and timing of overlap varying as a function of the load, the gas backflow into the cylinder and the intake port reducing engine pumping losses by reducing the manifold vacuum levels; and for engine wide open throttle (WOT) operating conditions, shifting the valve event timing schedules back towards the idle speed position but with a large valve overlap that decreases as a function of increasing the speed.

이 특허를 인용한 특허 (44)

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Murai, Atsushi; Murakami, Tomoyuki; Nakamura, Yoshitatsu, Apparatus for and method of controlling variable valve timing mechanism.
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Bryant,Clyde C., Internal combustion engine and working cycle.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, Method for controlling of valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, Method for controlling of valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, Method for controlling of valve timing of continuous variable valve duration engine.
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Collins, Brett Denton; Mianzo, Lawrence Andrew, Method of determining valve events to optimize engine operating parameters.
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Huang,Shenquiang, Method of modifying exhaust valve timing to improve engine performance.
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Teague Bruce H. ; DeGroot Kenneth P. ; Larson Thomas A., Sensor output precision enhancement in an automotive control system.
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Mazen Hammoud ; Mohammad Haghgooie, System and method for control of cylinder output torque in an internal combustion engine.
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Arai,Masahiro; Nagaishi,Hatsuo, System and method for controlling intake air by variable valve timing.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling of valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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Ryu, In Sang; Ha, Kyoung Pyo; Son, You Sang; Kwon, Kiyoung, System and method for controlling valve timing of continuous variable valve duration engine.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Variable valve timing operated engine 원문보기

초록 ▼

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이 특허를 인용한 특허 (44)

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Variable valve timing operated engine 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (44)

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