Abstract:
A vehicular transmission system (10) including a centrifugally operated master friction clutch (20) for drivingly coupling an engine (18) to an input shaft (28) of a mechanical transmission (12). Closed loop engine speed (ES) control is utilized to control engagement of the clutch during vehicle launch conditions.
Abstract:
A system/method of resetting the value of a control parameter (GCWCP) indicative of vehicular gross combined weight and determined as a filtered/averaged value, to a predetermined default value upon sensing vehicle operating conditions (50% GCWCP GCWTEST)deemed indicative of a change in vehicle loading. A vehicle automated system, such as an automated mechanical transmission system, is controlled as a function of the value of the control parameter.
Abstract:
A semi-automatic shift implementation system (100) for a manually shifted transmission (10) having gear ratios selectively engaged and disengaged by means of jaw clutches (48, 50) selectively positioned by a shift lever (57). The system will sense a transmission neutral condition and a target gear ratio (GR.sub.T) and will automatically cause the system engine (102) to achieve a synchronous speed for engaging the target ratio.
Abstract:
A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine speed during an upshift. These devices include an engine brake and an input shaft brake. A retarding torque is also provided by increasing engine accessory load by controlling various engine accessories such as a cooling fan, an air compressor, a hydraulic pump, an air conditioning compressor, and an alternator.
Abstract:
A splitter-type compound transmission (110) is provided with a splitter clutch (180) having increased backlash and a three-position actuator (202) controlled by a microprocessor-based controller (222). The controller will receive inputs for various sensors including a sensor indicating the position of a manual splitter selector switch (218).
Abstract:
A method/system for controlling an automated transmission is provided wherein upon assembly of a vehicle, the intercept (A) and slope (B) values defining the presumed linear relationship between engine deceleration rate and engine accessory torque (dES/dt rate=A+(B * T.sub.ACCES)) and/or the value of engine rotational moment-of-inertia (I) for that particular vehicle are determined and memorized. Thereafter, the transmission is controlled as a function of these determined values.
Abstract translation:提供了一种用于控制自动变速器的方法/系统,其中在组装车辆时,限定发动机减速率和发动机附件转矩(dES / dt速率= A +(...)的推定线性关系的截距(A)和斜率(B) B * TACCES))和/或该特定车辆的发动机转动惯量(I)的值被确定和记忆。 此后,根据这些确定的值来控制传输。
Abstract:
A reengagement control system/method (200) for a semi-automatic mechanical transmission system (104) of the type requiring manual synchronization of the transmission to enable automatic implementation of a selected shift into a target gear ratio is provided. The reengagement control will cause immediate engagement of an engageable ratio, based upon vehicle speed, if the transmission is shifted to neutral and is then unable to engage in the target gear for greater than a predetermined time (REF.sub.2) as vehicle acceleration (dOS/dt) exceeds an acceleration reference value (REF.sub.1).
Abstract:
A blocker-clutch assembly (10) includes an openly porous, pyrolytic carbon composite friction material (74) configured for optimum performance and, therefore, prevention or substantial prevention of nonsynchronous engagement of positive clutch members (12,14) due to premature unblocking of blocker tooth ramps (48-54). The composite friction material is formed to be resilient in direction normal to its friction surface (76b), is cut into segments (76), is bonded to a frustoconical surface (62) in a manner preseving the resiliency and with the segments circumferentially spaced apart, and is configured to control engagement force thereon in a range of 150-300 pounds per square inch (10-20 Kg/cm.sup.2).
Abstract translation:阻塞器 - 离合器组件(10)包括敞开的,热解的碳复合材料摩擦材料(74),其被配置为最佳性能,并因此防止或基本上防止由于过早的阻塞而导致的正离合器构件(12,14)的非同步接合 阻塞齿龈(48-54)。 复合摩擦材料形成为在垂直于其摩擦表面(76b)的方向上具有弹性,被切割成段(76),以预定弹性的方式并且与圆周间隔开的段结合到截头圆锥形表面(62) 并且被配置为在150-300磅/平方英寸(10-20Kg / cm 2)的范围内控制其上的接合力。
Abstract:
A control system/method for controlling the automatic or semi-automatic shifting of a range type compound transmission (10) is provided. The control utilizes a processing unit (106) requiring only two speed inputs, indicative of input shaft (16) and mainshaft (28) rotational speeds, to command both simple and compound shifts and to confirm the execution thereof.
Abstract:
A control system (158) for a multi-speed splitter type change gear auxiliary transmission section (14) of a compound transmission (10) of the type permitting preselection of a selected auxiliary section gear ratio is provided. The control system includes an operator actuated selector valve (160) for selection of a desired auxiliary section gear ratio and for selectively pressurizing or exhausting first (2) and second (3) selectively pressurized and exhausted fluid conduits which are directly fluidly connected to first and second (186 and 184) inlet ports at the remotely located actuator assembly (152). The actuator assembly (152) includes pistons (144 and 150) for assuming at least three selectable positions corresponding to engagement of one of at least three selectable auxiliary transmission section ratios and is enclosed in a valve body housing (170) having enlarged cavities adjacent the inlet ports (182, 184, 186) to define enlarged fluid reservoirs (R.sub.1, R.sub.2, R.sub.3) in fluid communication with the working surfaces (192, 194, 196, 202, 212) of the pistons.