摘要:
In a power transmission, which adjusts and transmits the rotational output of an engine by the engagement control of a starting clutch 5, the rotational speed Ne and the suction negative pressure Pb of the engine are measured while the starting clutch is being actuated from a disengaged condition to an engaged condition with the engine being operated under a constant operational condition. An engagement-control value is calculated for the starting clutch when there is a change in the rotational speed and the suction negative pressure being measured, and the engagement-control value calculated is stored as an initial control value for starting an engaging action of the starting clutch. This initial control value is used for controlling the engagement of the starting clutch.
摘要:
A power transmission comprises a continuously variable transmission CVT, which transmits a rotational driving force from an engine to wheels, a starting clutch 5, which sets variably the transmission capacity of the continuously variable transmission, and a control valve CV, which controls the engagement actuation of the starting clutch 5. While a vehicle equipped with this power transmission is decelerating, the engagement of the starting clutch is controlled to transmit a rotational driving force from the wheels to the engine. Specifically, the engaging capacity of the starting clutch is controlled to bring the difference between the input and output rotational speeds of the starting clutch into a predetermined range, and the control pressure of the starting clutch that brings this difference in the predetermined range is learned, i.e., stored in memory and renewed, as a control value for the next deceleration of the vehicle.
摘要:
A rotational driving force from an engine E in a fuel-supply termination control is transmitted through a continuously variable transmission CVT, and this transmission of the rotational driving force is controlled by the engagement of a starting clutch 5. In this arrangement, a control system terminates the fuel supply to the engine at the elapse of a predetermined time from the starting of a deceleration of the vehicle. When the control system detects that the throttle of the engine has closed, it reduces the engaging force of the starting clutch 5 to disengage the clutch into a pre-engagement condition. Thereafter, when the fuel supply to the engine is terminated, the engaging force is gradually increased to bring the starting clutch 5 gradually into engagement.
摘要:
A vehicular power-transmission control system comprises a continuously variable transmission CVT, which transmits the output of an engine E to wheels, a starting clutch 5, which controls the transmission of power in the continuously variable transmission, an electrical motor generator M, which can assist the engine in rotational drive, and a hydraulic pump P, which is connected to the output shaft of the engine. When the vehicle, which has come into a halt with the engine consequently stopped in an idling elimination control, is to be restarted, the power-transmission control system controls the electrical motor generator to rotate the output shaft of the engine, to which fuel supply is not allowed, thereby to drive the pump. Thereafter, when the starting clutch receiving a hydraulic pressure from the hydraulic pump starts its engagement, the power-transmission control system starts the operation of the engine.
摘要:
A vehicular power-transmission control system transmits the rotational driving forces of an engine E and an electrical motor generator M through a continuously variable transmission CVT to wheels by controlling the speed change ratio of the continuously variable transmission CVT in correspondence to the operational condition of the vehicle. Additionally, the control system corrects the speed change ratio of the transmission in correspondence to the difference between the actual output of the electrical motor generator and the requested output of the electrical motor generator that is set correspondingly to the speed of the vehicle.
摘要:
A power transmission comprises a continuously variable transmission CVT, which transmits a rotational driving force from an engine E, a starting clutch 5, which variably sets the transmission capacity for the continuously variable transmission CVT, and a control valve CV, which controls the engagement operation of the starting clutch 5. While the engine E is in a partial cylinder operation mode, the control valve CV controls the engagement operation of the starting clutch 5 to attain a predetermined transmission capacity at a rotational speed of the engine that is higher than for a case of the engine in an all cylinder operation mode.
摘要:
A power transmission comprises an engine E with a plurality of cylinders, a belt-type continuously variable transmission CVT, which changes the rotational speed being transmitted from the engine, a control valve CV, which variably sets the line pressure used for controlling the speed change ratio of the transmission, and an electrical control unit ECU, which calculates the torque of the output shaft of the engine when the engine is decelerating in a partial cylinder operation mode. While a vehicle equipped with this power transmission is decelerating with the engine being in a partial cylinder operation mode, the control valve CV sets the line pressure in correspondence to the torque of the engine output shaft calculated by the electrical control unit ECU.
摘要:
An internal gear shaving machine 1 which brings a shaving cutter 3 and an internal gear held by a workpiece chuck 2 into engagement with a crossed axes angle, and subjects the tooth flanks of the internal gear to final machining while it rotationally drives at least one of the shaving cutter 3 and the workpiece chuck 2. The workpiece chuck 2 and shaving cutter 3 are supported movably toward and away from each other in a vertical direction with the workpiece chuck 2 higher and supported movably in the horizontal direction relative to each other. The workpiece chuck 3 is constituted to hold the outer circumferential surface of the internal gear with the axis of rotation of the internal gear oriented in a up-down direction so that shavings produced during processing by the shaving cutter can fall downwardly from the internal gear.
摘要:
A hydraulic controller of a power transmission device is equipped with a transmission for changing a rotation speed of motor power input from a motor and outputting the motor power; a forward/backward change-over mechanism provided between an input shaft, where the motor power of the motor is input and the transmission; and a torque converter having a direct coupling mechanism for transmitting the motor power between an output shaft and the input shaft of the motor; a solenoid valve for adjusting an original pressure and generating a control pressure; and a change-over element for changing over a hydraulic pressure supplied to the forward/backward change-over mechanism so as to become a low pressure during deceleration driving when the direct coupling mechanism is controlled by the solenoid valve, wherein any one of engagement states of the forward/backward change-over mechanism and the direct coupling mechanism is controlled by the control pressure.
摘要:
A theoretical torque transmitted through a belt is calculated, and a first guaranteed torque is calculated by adding a marginal torque to the theoretical torque. In step S101, the theoretical torque is multiplied by a safety factor, calculating a second guaranteed torque. The second guaranteed torque is set to a value greater than a lower limit value. A smaller one of the first guaranteed torque and the second guaranteed torque is stored in a buffer, and a pressing force calculation reference torque is set through the buffer.