摘要:
A control device is configured to: (i) control a rotation speed of an internal combustion engine (20) such that the rotation speed of the internal combustion engine is increased with an increase in a traveling speed of a vehicle (10), (ii) execute a pseudo gear shift to control the rotation speed of the internal combustion engine (20) such that the rotation speed of the internal combustion engine is decreased to a first rotation speed, (iii) execute a mechanical gear shift to change a second gear ratio according to a gear shift line determined by the traveling speed and a value according to the acceleration request, and (iv) execute adjustment control to adjust the rotation speed of the internal combustion engine in advance in a period before executing the mechanical gear shift such that the rotation speed of the internal combustion engine matches the pseudo gear shift threshold value when the mechanical gear shift is performed.
摘要:
The present invention is directed toward a transmission comprising: - a transmission case; - a first planetary gear mechanism arranged in the transmission case and comprising a sun gear, a planet gear set, and a ring gear; - a transmission input shaft connected to the first planetary gear mechanism and connectable to an external power source for driving the planetary gear mechanism; - at least one transmission output shaft connected to the first planetary gear mechanism and connectable to an external device for driving said external device; - at least one first hydrostat arranged externally on the transmission case and connected to the first planetary gear mechanism via a pump input shaft and configured to act as a unidirectional variable displacement pump driven by the planetary gear mechanism; - at least one second hydrostat arranged externally on the transmission case, driven by the first hydrostat, and configured to act as a unidirectional motor and connected to the planetary gear mechanism via a motor output shaft for driving the first planetary gear mechanism; wherein each of said transmission input shaft, said first hydrostat and said second hydrostat is connected to a respective one of said sun gear, said planet gear set, and said ring gear; wherein said transmission output shaft is connected to the one of said sun gear, said planet gear set, and said ring gear to which the second hydrostat is connected; wherein the first hydrostat and the second hydrostat are separate devices each having its own case arranged externally on the transmission case, and are connected via a hydraulic circuit that is configured for unidirectional flow of hydraulic oil between the first hydrostat and the second hydrostat.
摘要:
A PTO transmission system in a vehicle for transmitting power to a PTO shaft driving an implement comprises a planetary drive unit having first and second input and output coupled to the PTO shaft. The first and second input are coupled to an output shaft of the vehicle engine and to an output shaft of a drive motor, respectively. A control system controls the transfer of power from a power source to the drive motor. The power source is a variable power generating source driven by the PTO shaft. The drive motor is configured and adapted to decrease or increase the rotational speed of the output of the planetary drive unit on an increase or decrease of the power transferred to it, respectively.
摘要:
A control mechanism for a continuously variable transmission, the transmission having a mechanical branch and a hydrostatic branch, the hydrostatic branch having a variable displacement hydraulic pump which drives first and second variable displacement hydraulic motors, the control mechanism controlling an operating angle of the hydraulic pump and motors, the mechanism comprising: an actuator, a pump adjustment means, operable by the actuator, to vary the operating angle of the pump, characterised in that the mechanism further comprises: first and second motor adjustment means, the adjustment means being operable by the actuator to vary the operating angle of the first and second motors, respectively.
摘要:
A method to control an electro-mechanical transmission (10) mechanically-operatively coupled to an internal combustion engine (14) and first (56) and second (72) electric machines to transmit power to an output member (64) includes determining motor torque constraints and battery power constraints. A preferred output torque to an output member (64) is determined that is achievable within the motor torque constraints and is achievable within a range for a first torque input and is achievable within a range for a second torque input and is based upon the battery power constraints.
摘要:
A powertrain system is operative to transfer power between an input member (12) and a plurality of power actuators (56,72) and an output member (64) to generate an output torque. The power actuators (56,72) are connected to an energy storage device (74). A method for controlling the powertrain system includes monitoring operating conditions of the powertrain system, determining an electric power limit for output power of the energy storage device (74), selectively enabling electric power boost based upon the operating conditions of the powertrain system, and increasing the electric power limit when electric power boost is enabled.
摘要:
A system is provided for determining the current weight of a vehicle and any implement or trailer being towed or carried thereby. The system has an electronic control unit (13) and means to determine the current value of vehicle operating parameters indicative of the current wheel output torque and acceleration of the vehicle. These current parameter values are forwarded to the electronic control unit (13) so that the unit can calculate the current vehicle weight from a predetermined relationship involving wheel output torque, vehicle acceleration and other known current operating parameters of the vehicle. The other known current operating parameters of the vehicle are wheel rolling radius, angle of inclination of the vehicle, gravitational acceleration and rolling resistance of the wheels. The vehicle includes a hydrostatic mechanical CVT (T) which has a hydraulic drive circuit in which a hydraulic pump (200) supplies pressurised fluid to a hydraulic motor (210), the level of pressure in the drive circuit provides an indication of the current wheel output torque.
摘要:
A PTO transmission system in a vehicle for transmitting power to a PTO shaft driving an implement comprises a planetary drive unit having first and second input and output coupled to the PTO shaft. The first and second input are coupled to an output shaft of the vehicle engine and to an output shaft of a drive motor, respectively. A control system controls the transfer of power from a power source to the drive motor. The power source is a variable power generating source driven by the PTO shaft. The drive motor is configured and adapted to decrease or increase the rotational speed of the output of the planetary drive unit on an increase or decrease of the power transferred to it, respectively.
摘要:
Operation of an electro-mechanical transmission (10) includes determining motor torque constraints and battery power constraints. An additional constraint on the electro-mechanical transmission (10) is determined. A preferred output torque is determined that is achievable within the motor torque constraints and based upon the additional constraint and the battery power constraints.
摘要:
A powertrain system includes a transmission (10) operative to transfer power between a plurality of power actuators (56,72) and an output member (64), and an energy storage device (74). A method for controlling the powertrain system includes establishing a first set of electric power limits and a second set of electric power limits for the energy storage device (74), determining a preferred input power from a first power actuator (56) based upon the first set of electric power limits, determining a first set of power constraints for constraining input power from the first power actuator (56) and a second set of power constraints for constraining output power from the output member (64) based upon a second set of electric power limits, and controlling operation of the powertrain system based upon the preferred input power, the first set of power constraints, and the second set of power constraints.