[특허]Hybrid powertrain vehicle

Hybrid powertrain vehicle 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60K-026/00
출원번호	US-0253944 (1994-06-03)
발명자 / 주소	Gray Jr. Charles L. (Pickney MI) Hellman Karl H. (Ann Arbor MI) Safoutin Michael J. (Ann Arbor MI)
출원인 / 주소	The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency (Washington DC 06)
인용정보	피인용 횟수 : 131 인용 특허 : 0

초록 ▼

Engine output speed is controlled for optimum efficiency by adjustment of input speed of a continuously variable transmission (CVT). Where power in excess of that provided by the engine is required, additional power is input to the drivetrain from a fluidic motor driven by fluid pressure stored in an accumulator. In driving conditions where the engine, operating at optimum efficiency, produces power in excess of that demanded by of the vehicle, the fluidic motor is reversed for operation as a pump and excess engine power is utilized to drive the pump and store energy in the accumulator in the form of fluid pressure. A CPU determines power output required of the engine as a sum of that indicated by a sensor which senses power demanded of the vehicle by a driver and an increment of power required to maintain the pressure of the accumulator above a threshold amount. An engine speed controller controls the rotary speed of the engine output, to produce the required total power output, by changing the input speed of the CVT. In order to maintain optimum engine efficiency, a memory associated with the CPU is stored with maps correlating values for optimum engine speed with values for engine output power and the optimum engine speed is read from the map by reference to the determined total requirement for engine output power. Optionally, the vehicle may include first and second engines with the second engine providing a power assist under driving conditions demanding power in excess of that available from the primary engine in combination with the fluidic motor. The invention also includes a method of operating the system in order to achieve the objective of optimum engine efficiency.

대표청구항 ▼

A hybrid powertrain vehicle comprising: a vehicle frame; drive wheels rotatably mounted on said vehicle frame; a primary engine, mounted on said vehicle frame, for providing engine power by rotation of an output shaft; power storage means, mounted on said vehicle frame, for storing and releasing power generated by said primary engine; first drive train means for transmitting said engine power to said drive wheels, said first drive train means including a transmission having adjustable speed input and output; reversible means for selectively, while driven by said rotation of said engine in a first mode, transmitting said engine power to said power storage means or, operating as a motor in a second mode, transmitting stored power from said power storage means to said first drive train; second drive train means, in parallel with at least a portion of said first drive train means, connecting said reversible means to said first drive train means, for, in said second mode, transmitting said stored power to said first drive train means and for, in said first mode, transmitting said rotation of said engine to said reversible means for transfer of a portion of said engine power to said power storage means simultaneously with transfer of the remainder of said engine power to said drive wheels; vehicle speed sensor means for sensing vehicle speed; stored power sensor means for sensing a quantity of power stored within said power storage means; power demand sensing means for sensing power demanded of the vehicle by a driver; comparing means for comparing said sensed quantity of stored power with a predetermined minimum amount of stored power and generating a demand signal upon determination that said sensed quantity is below said predetermined amount; power output determining means for determining an additional increment of power in accordance with said demand signal and for determining an engine output power as a sum of the sensed power demand and the additional increment of power; engine speed control means for controlling speed of said rotation of said output shaft by changing the input speed of said transmission responsive to a transmission signal; engine speed determining means for determining an engine speed of optimum efficiency in accordance with said determined engine output power and said sensed vehicle speed and for outputting the transmission signal, indicative of the determined engine speed, to said engine speed control means; engine load control means for controlling said engine power by controlling fuel feed to said primary engine responsive to said transmission signal; and mode control means for converting operation of said reversible means between said first and second modes responsive to the demand signal.

이 특허를 인용한 특허 (131)

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Gray, Jr.,Charles L., Methods of operating a parallel hybrid vehicle having an internal combustion engine and a secondary power source.
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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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Hybrid powertrain vehicle 원문보기

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