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公开(公告)号：US5984834A
公开(公告)日：1999-11-16
申请号：US936203
申请日：1997-09-23
CPC分类号： F16H61/061 , B60W2510/0638 , B60W2710/0644 , F16H2059/363 , F16H2059/467 , F16H2061/0087 , F16H59/36 , F16H61/0265 , Y10T477/693754 , Y10T477/69383
摘要： Even if a rotational speed of an engine has already increased due to slipping of a fluid torque converter at the time of start of downshifting, a smooth downshifting is performed. For that purpose, there is obtained a speed change developing degree function K(etrm) of the rotational speed of the engine at the time of start of downshifting, the developing degree being dependent on an increase in the rotational speed of the engine due to slipping in the fluid torque converter. The function K(etrm) is obtained with a speed ratio "etrm" of the fluid torque converter at the time of starting of downshifting as a parameter. A boosting correction value QDNOFFZ is computed by multiplying a reference correction value QDNOFFZO by K(etrm) (step S108-5). The hydraulic pressure of the hydraulic engaging element on the disengaging side during downshifting is boosted by the amount of QDNOFFZ (step S108-6).
摘要翻译： 即使在降档开始时由于液压变矩器的滑动引起的发动机的转速已经增加，因此进行平滑的降档。 为此，在降档开始时获得发动机的转速的变速显影度函数K（etrm），显影程度取决于发动机由于滑动而产生的转速的增加 在液力变矩器中。 在降档开始时作为参数，以流体力矩转换器的速度比“etrm”获得功能K（etrm）。 通过将参考校正值QDNOFFZO乘以K（etrm）来计算增强校正值QDNOFFZ（步骤S108-5）。 在降档期间，分离侧的液压接合元件的液压升高了QDNOFFZ的量（步骤S108-6）。
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2.发明授权
公开(公告)号：US5960669A
公开(公告)日：1999-10-05
申请号：US921353
申请日：1997-08-29
CPC分类号： F16H59/72 , B60W2510/0676 , F16H2059/467 , F16H59/64 , Y10T477/653 , Y10T74/19251
摘要： A system for estimating a temperature of a vehicle hydraulically-operated transmission including a hydraulic torque converter, a plurality of frictional engaging elements such as clutches installed in the transmission and a hydraulic pressure supplying circuit for discharging hydraulic fluid from one of said plurality of frictional engaging elements and for supplying hydraulic fluid to another to bring said one and another one of said plurality of frictional engaging elements into operation such that gear-shift is effected in the transmission. A heat quantity generated by the hydraulic coupling means (.DELTA.Ttr), a heat quantity generated by at least one of the frictional engaging elements at gearshift (.DELTA.Tcl(No)), a heat quantity generated by stirring of the hydraulic fluid (.notident.Tst), a heat quantity generated or absorbed at a heat exchanger which exchanges heat from the fluid (.DELTA.Tra), and some similar values are calculated and summed to estimate a temperature of the clutches, thereby enabling a fine hydraulic pressure control.
摘要翻译： 一种用于估计车辆液压操作变速器的温度的系统，包括液压变矩器，多个摩擦接合元件，例如安装在变速器中的离合器，以及液压供应回路，用于从所述多个摩擦接合 并且用于将液压流体供应到另一个以使所述多个摩擦接合元件中的所述一个和另一个摩擦接合元件进行操作，使得变速器在变速器中进行变速。 由液压联接装置（DELTA Ttr）产生的热量，由换档（DELTA Tcl（No））中的至少一个摩擦接合元件产生的热量，通过搅拌液压流体产生的热量（NOTEQUAL Tst ），计算在热交换器中产生或吸收的热量（来自流体（DELTA Tra））的热量和一些类似的值，以估计离合器的温度，从而实现精细的液压控制。
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公开(公告)号：US4934348A
公开(公告)日：1990-06-19
申请号：US366139
申请日：1989-06-14
申请人： Toru Yagi , Kaname Tokita
发明人： Toru Yagi , Kaname Tokita
CPC分类号： F01L13/0031 , F01L1/34406 , F01L9/04
摘要： A valve operation control system for an internal combustion engine having an engine valve supported in an engine body for opening and closing. A phase control means is interposed between a crankshaft and the valve operating cam shaft to control the rotating phase of the crankshaft relative to the valve operating cam shaft. A valve drive means is interposed between the valve operating cam and the engine valve to transmit the valve opening force by the valve operating cam to the engine valve. The valve drive means includes a resilient valve opening means for generating resilient force in the valve opening direction and a holding means for holding the engine valve in a closed position while springs accumulate the valve opening force. The holding means is selectively operable to switch between a valve holding state and a valve releasing state to control the valve opening timing of the engine valve in response to operating conditions of said engine.
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公开(公告)号：US4917056A
公开(公告)日：1990-04-17
申请号：US247952
申请日：1988-09-22
CPC分类号： F01L1/143 , F01L1/16 , F01L1/181 , F01L13/00 , F01L13/0031 , F01L9/04 , F02B2275/18
摘要： A valve operation control system in an internal combustion engine, comprising an engine valve openably and closably supported on an engine body, a valve spring for biasing the engine valve in a valve closing direction, and valve driving means interposed between a valve-operating cam and the engine valve to transmit a force in the valve-opening direction provided by the valve-operating cam to the engine valve. The valve driving means includes a valve-opening resilient member for exhibiting a repulsive force in a direction to open the engine valve, and closed-position retaining means is interposed between the engine valve and the valve operating cam for retaining the engine valve at its closed position, with a valve-opening force provided by the valve-operating cam being accumulated by the valve-opening resilient member. The closed-position retaining means is arranged to be switchable between a retaining state and a releasing state to control the timing of opening the engine valve depending upon the operational condition of the engine.
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