摘要:
A gear selector apparatus for a transmission having a first gear and a second gear selectively engageable to a shaft through a synchronizer. The gear selector apparatus includes a hydraulic actuator, a gear selection fork engaged with the actuator, a guide bar fixed for common movement to the gear selection fork, a detent mechanism disposed in contact with a first edge of the guide bar, a position sensor disposed in contact with a second edge of the guide bar, a first and a second pressure control valve in communication with the hydraulic actuator, a controller in electrical communication with the position sensor and the first and second pressure control valve. The controller includes a control logic sequence.
摘要:
A system and method for transferring torque from a prime mover to a transmission includes a coupling device, a hydraulic control system and a control module. The coupling device includes a torque converter clutch (TCC), where the coupling device is located between an output of the prime mover and an input of the transmission. The TCC is actuated between a fully engaged position, a slip mode where slip occurs, and a fully disengaged position. The hydraulic control system includes a controller device that communicates an actuation pressure to the TCC. The actuation pressure actuates the TCC between the fully engaged position, the slip mode, and the fully disengaged position. The controller is in communication with the TCC, the output of the prime mover, the input of the transmission, and the controller device of the hydraulic control system. The controller regulates the actuation pressure.
摘要:
A centrifugal pendulum vibration absorber (CPVA) for absorbing torsional vibration created by operation of an engine includes a plurality of pendulums moveable with respect to a rotatable shaft. The pendulums are connected to the rotatable shaft by a plurality of pins that extend through apertures in the pendulum. The pendulums each move along a path defined by various drive line or powertrain parameters and characteristics. The path is implemented by contouring an active section of the apertures that engage the pins.
摘要:
A pressure sensor module for a vehicle includes a sensing element module, a sampling module, a filtering module, and a monitoring module. The sensing element module measures a pressure of a fluid and outputs a pressure signal based on the pressure. The sampling module samples the pressure signal. The filtering module receives at least one filter coefficient from a control module and determines a filtered pressure based on at least one of the samples. The monitoring module receives a condition monitoring request from the control module, receives a predetermined value from the control module, and notifies the control module when a condition is satisfied based on a comparison of the predetermined value and one of the filtered pressure and a parameter determined based on the pressure signal.
摘要:
A system and method for setting the slip of a torque converter for a plurality of selected engine speeds and transmission gears. The method includes populating a table off-line, typically using a dynamometer, with torque converter slips for a plurality of selected engine speeds and transmission gears. A speed sensor is used to measure vibrations transmitted through the torque converter to the driveline of the vehicle. The sensor signal is sent to an analyzing system where it is converted to the frequency domain. A separate minimum slip value for each selected engine speed and transmission gear is stored in a table so that during vehicle operation, a controller will instruct the torque converter clutch to set the desired converter slip for the current engine speed and transmission gear provided for a particular throttle position and/or engine torque.
摘要:
A system of a first vehicle includes a communication module, a translation module, a driver identification module, and an actuator control module. The communication module receives first vehicle control data generated based on operation of a second vehicle by a driver. The first and second vehicles are different. The translation module determines second vehicle control data based on the first vehicle control data and first characteristics of the first vehicle. The driver identification module selectively indicates when the driver is operating the first vehicle. During operation of the first vehicle by the driver, the actuator module controls at least one actuator of the first vehicle based on the second vehicle control data.
摘要:
A target pressure module determines a target pressure for controlling a solenoid of a transmission. An error module determines a pressure error based on a difference between the target pressure and a pressure measured using a pressure sensor. A pressure offset module determines a pressure offset using the target pressure and a mapping of pressure offsets indexed by target pressure. An offset learning module selectively determines a learned pressure offset and selectively updates the mapping based on the learned pressure offset. A pressure command module selectively generates a commanded pressure based on the target pressure, the pressure offset, and the pressure error. A solenoid control module controls actuation of the solenoid based on the commanded pressure.
摘要:
A method to control a hydraulically actuated clutch in a transmission of a vehicle includes monitoring a pressure in a hydraulic circuit providing pressurized fluid to the hydraulically actuated clutch with micro-electromechanical pressure sensor, providing a closed-loop feedback control command for a hydraulic control device providing the pressurized fluid to the hydraulic circuit based upon the monitoring pressure, and controlling the control device based upon the closed-loop feedback control command.
摘要:
A method for determining whether an accumulator is filled to a predetermined level with a hydraulic fluid includes commanding a current to a solenoid, providing pressurized hydraulic fluid to the accumulator, setting a timer to an initial value, incrementing the timer, determining if the timer is greater than a timer threshold value, measuring a current to the solenoid if the timer is greater than the timer threshold value, calculating a modified current as a function of the measured current, the timer value, and the commanded current, comparing the modified current to a threshold, and determining that the accumulator is filled to the predetermined level if the modified current is greater than the threshold.
摘要:
A method for controlling torque converter slip includes operating the torque converter in a controlled slip mode, monitoring slip in the torque converter, statistically analyzing the monitored slip to determine a likely condition of the torque converter, and utilizing the likely condition of the torque converter to control the torque converter slip.