Abstract:
A control apparatus of an automatic transmission includes an electric hydraulic pump including a motor and a pump, an actuator for engaging or releasing a friction element by controlling a hydraulic pressure discharged from the pump, and a transmission control unit (TCU) for correcting a control signal to control the actuator depending on a dynamic characteristic coefficient of the friction element and the actuator during shifting when outputting the control signal to the actuator.
Abstract:
A hydraulic circuit may include a proportional control solenoid valve controlling hydraulic pressure such that an operating hydraulic pressure required by the friction member is supplied to the friction member; a supply hydraulic path connecting the proportional control solenoid valve with the friction member, and adapted to supply hydraulic pressure controlled by the proportional control solenoid valve to the friction member; and a switch valve disposed in the supply hydraulic path so as to selectively open/close the supply hydraulic path.
Abstract:
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump provided with first and second pump chambers formed therein to a high pressure portion and a low pressure portion of the automatic transmission through a high-pressure regulator valve, first and second switch valves, and a low-pressure regulator valve.
Abstract:
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump provided with first and second pump chambers formed therein to a high pressure portion and a low pressure portion of the automatic transmission through a high-pressure regulator valve, the switch valve, and a low-pressure regulator valve.
Abstract:
A hydraulic pressure supply system may include a low-pressure hydraulic pump receiving the oil stored in the oil pan and generating the low hydraulic pressure, a low-pressure regulator valve controlling the low hydraulic pressure of the first low-pressure line, a reducing valve fluid-connected to the low-pressure regulator valve and supplying a hydraulic pressure to the low pressure portion, a high-pressure hydraulic pump increasing the low hydraulic pressure supplied from the low-pressure hydraulic pump, a switch valve disposed between the first low-pressure line and the high-pressure line, and selectively connecting the first low-pressure line and the high-pressure line, a high-pressure regulator valve controlling the increased hydraulic pressure supplied from the high-pressure hydraulic pump and the low hydraulic pressure selectively supplied from the low-pressure hydraulic pump through the switch valve, and supplying the stable high hydraulic pressure to the high pressure portion.
Abstract:
A hydraulic pressure supply may include a low pressure portion, a high pressure portion, a low-pressure hydraulic pump receiving the oil stored in the oil pan and discharging the low hydraulic pressure to a first low-pressure line fluid-connected to the low-pressure hydraulic pump, a switch valve fluid-connected to the first low-pressure line, and selectively supplying the low hydraulic pressure to the low pressure portion or the high pressure portion, a low-pressure regulator valve connected to the switch valve, a high-pressure hydraulic pump fluid-connected to the low-pressure hydraulic pump through the first low-pressure line, a high-pressure regulator valve fluid-connected to the high pressure line and controlling the high hydraulic pressure supplied from the high-pressure hydraulic pump and the low hydraulic pressure supplied from the low-pressure hydraulic pump to be stable high hydraulic pressure, a second input line connecting the oil pan to the first low-pressure line.
Abstract:
A hydraulic pressure supply system of an automatic transmission for a vehicle is disclosed. The hydraulic pressure supply system of an automatic transmission for a vehicle may supply a low hydraulic pressure generated at a low-pressure hydraulic pump to a low pressure portion through a low-pressure regulator valve, may supply a portion of the low hydraulic pressure to a high-pressure hydraulic pump, and may supply a high hydraulic pressure generated at the high-pressure hydraulic pump to a high pressure portion through a high-pressure regulator valve.
Abstract:
A hydraulic pressure supply system of an automatic transmission for a vehicle may generate low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and may supply the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion.
Abstract:
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump provided with first and second pump chambers formed therein to a high pressure portion and a low pressure portion of the automatic transmission through a high-pressure regulator valve, first and second switch valves, and a low-pressure regulator valve.
Abstract:
A hydraulic pressure supply system may supply low hydraulic pressure generated at a low-pressure hydraulic pump to a low pressure portion through a low-pressure regulator valve, may supply a portion of the low hydraulic pressure to a high-pressure hydraulic pump, and may supply high hydraulic pressure generated at the high-pressure hydraulic pump to a high pressure portion through a high-pressure regulator valve.