摘要:
A method for determining a driveline ratio for a powertrain having an auxiliary transmission is provided and includes identifying a transmission gear ratio, measuring a transmission output speed, and measuring an auxiliary transmission output speed. An auxiliary transmission gear ratio is identified by comparing the transmission output speed to the auxiliary transmission output speed when the powertrain is in motion. The auxiliary transmission gear ratio is identified from a switch when the powertrain is at rest. An auxiliary transmission module has an auxiliary transmission in communication with a controller. The controller is configured to identify an auxiliary transmission gear ratio, and limit an engine torque command to limit the auxiliary transmission output torque. The engine torque command is limited if the output torque exceeds a predetermined value and if the auxiliary transmission is in a reducing gear ratio.
摘要:
A method/system for adaptively controlling engine fueling to control the rate of decreasing engine torque ((−d/dt)(ET)) during disengagement of a jaw clutch (70) while maintaining the vehicle master friction clutch (20) engaged. Engine torque is decreased at a determined by comparing the rate of change of throttle pedal position ((d/dt)(THL)) to allow minimum (MIN) and maximum (MAX) rates of engine torque decrease.
摘要:
A method/system for controlling an automated mechanical transmission system (10) utilized on a vehicle. To protect from driveline damage due to improper clutch engagement during vehicle launch conditions, the master friction clutch (16) is partially engaged to determine a direction of rotation of the input shaft (18) from the non-directional signal (IS) received from a non-directional speed sensor (36).
摘要:
A shift control system is provided that is suitable for semi-automatic transmissions in heavy duty vehicles. The torque modulation system includes logic circuitry that employs a ramping torque function or algorithm to control the acceleration of torque, both positive and negative, and/or provides a longer dwell time in the torque clutch disengagement range. Moreover, dwell time at peak is not required. A method for improving gear disengagement and shift control in accordance with the principles of the invention is also disclosed.
摘要:
An engine-transmission control system is disclosed which provides for variable shift points of a manual/automatic transmission during cruise control and non-cruise control operation of the vehicle. Vehicle speed, engine speed, and engine loading are variables used individually or in combination in order to determine when shifting of the automatically controllable gear ratio operation states of the manual/automatic transmission will occur. In addition, the system includes modes of operation which include algorithms for determining varying gear shift points so that gear shifting of the top two gears occurs at various vehicle speeds dependent upon input parameters to the cruise control system and additionally in response to which cruise control mode of operation is currently selected by the driver. In addition, control of the automatic shifting of the manual/automatic transmission when the cruise control system is inactive or disabled is determined according to algorithms designed to optimize fuel economy as well as improve driveability of the vehicle and reduce driver fatigue.
摘要:
A powertrain system (10) control system/method for controlling application of a force to cause full engagement of partially engaged jaw clutch as a function of sensed engine torque.
摘要:
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, operation of a manually actuated switch (120), and a target gear ratio (GR.sub.T) and, upon sensing a transmission neutral condition and continued actuation of said switch, will automatically cause the system engine (102) to achieve a substantially synchronous speed (ES=IS=((OS*GR.sub. T).+-.E) for engaging the target ratio.
摘要翻译:一种用于手动变速传动装置(10)的半自动换档执行系统(100),其具有通过由换档杆(57)选择性定位的爪式离合器(48,50)选择性地接合和分离的档位比。 系统将感测到传动装置中性状态,手动致动的开关(120)的操作和目标齿轮比(GRT),并且在感测到传动装置中性状态并且所述开关的继续致动时将自动地使系统发动机(102 )以实现用于接合目标比率的基本上同步的速度(ES = IS =((OS * GRT)+/- E)。
摘要:
A control method/program for rapidly confirming engagement of a target gear ratio (GR.sub.T) in an automated mechanical transmission system (92) on the basis of input signals (ES, or IS, OS) indicative of transmission input shaft (18) and output shaft (58) rotational speeds.
摘要:
An automated mechanical transmission system (92) including anti-hunt logic (FIG. 7) and logic allowing the operator to reduce or cancel the anti-hunt logic offsets by post-shift throttle pedal (THL) manipulation.
摘要:
An automated transmission (10) system having a selectable automatic shift initiation mode of operation (D) is provided with manually operated selectors (226/228) for selectively increasing and decreasing the engine speeds (240, 242) at which upshifts and downshifts are implemented in the automatic shift initiation mode of operation.