A shift control device for a vehicle includes: an engine; a shift mechanism disposed between the engine and driving wheels; a shift control section configured to control a transmission gear ratio of the shift mechanism; and a fuel cut control section configured to stop a fuel supply to the engine, at least when an accelerator pedal is in a release state, and when an engine speed is equal to or greater than a predetermined rotation speed, the shift control section being configured to perform a minimum rotation speed restriction control to control the transmission gear ratio of the shift mechanism so that the minimum rotation speed of the engine is equal to or greater than the predetermined rotation speed regardless of a vehicle front condition and an accelerator operation condition.

This vehicle transmission system includes a transmission (21), a clutch device (26), a clutch control unit (61), and a shift operation detecting means (48), and, when a hydraulic pressure is supplied from a clutch actuator (50) to a slave cylinder (28), the clutch device (26) moves to a connection side, in an in-gear stop state in which the transmission (21) is in an in-gear state, and a vehicle (1) is in a stop state, the clutch actuator (50) supplies a standby hydraulic pressure (WP) to the slave cylinder (28), and the clutch control unit (61) sets the standby hydraulic pressure (WP) to a first setting value (P1) during non-detection in which a shift operation is not detected by the shift operation detecting means (48) and sets the standby hydraulic pressure (WP) to a second setting value (P2) lower than the first setting value (P1) when the shift operation is detected by the shift operation detecting means (48).

A vehicle control apparatus calculates a target speed value of an engine rotational speed that is required to provide a required torque value of an engine brake torque, and controls shifting of an automatic transmission such that the engine rotational speed is approximated to the target speed value of the engine rotational speed. The vehicle control apparatus determines whether the target speed value exceeds a predetermined threshold value. When the target speed value exceeds the predetermined threshold value, the vehicle control apparatus controls the shifting of the automatic transmission such that the engine rotational speed is held not higher than the predetermined threshold value, and controls a throttle valve such that the throttle valve is opened.

A vehicle control apparatus calculates a target speed value of an engine rotational speed that is required to provide a required torque value of an engine brake torque, and controls shifting of an automatic transmission such that the engine rotational speed is approximated to the target speed value of the engine rotational speed. The vehicle control apparatus determines whether the target speed value exceeds a predetermined threshold value. When the target speed value exceeds the predetermined threshold value, the vehicle control apparatus controls the shifting of the automatic transmission such that the engine rotational speed is held not higher than the predetermined threshold value, and controls a throttle valve such that the throttle valve is opened.

An apparatus and a method for controlling driving of a vehicle may include a first sensor that detects whether an accelerator pedal is pressed, a second sensor that detects a number of RPM of an engine, and a controller that determines whether the vehicle coasts based on whether the accelerator pedal is pressed, and determines whether to change a gear ratio of a transmission based on the number of RPM of the engine so that the coasting distance is increased in the coasting deceleration section, improving the fuel efficiency.

An apparatus and a method for controlling driving of a vehicle may include a first sensor that detects whether an accelerator pedal is pressed, a second sensor that detects a number of RPM of an engine, and a controller that determines whether the vehicle coasts based on whether the accelerator pedal is pressed, and determines whether to change a gear ratio of a transmission based on the number of RPM of the engine so that the coasting distance is increased in the coasting deceleration section, improving the fuel efficiency.

An electronic control module (ECM) may obtain sensor information concerning an engine and may determine, based on the sensor information, a speed of the engine. The ECM may cause a swashplate of a hydraulic pump to adjust based on the speed of the engine.

An electronic control module (ECM) may obtain sensor information concerning an engine and may determine, based on the sensor information, a speed of the engine. The ECM may cause a swashplate of a hydraulic pump to adjust based on the speed of the engine.

When the vehicle speed increases and reaches a predetermined switching threshold, the controller reduces the displacement of the first travel motor and controls the flow rate control device to offset a flow rate excess in the hydraulic circuit in accordance with the reduction in the displacement of the first travel motor. After the vehicle speed has reached the switching threshold, the controller executes switching control to switch the clutch from an engaged state to a disengaged state.

When the vehicle speed increases and reaches a predetermined switching threshold, the controller reduces the displacement of the first travel motor and controls the flow rate control device to offset a flow rate excess in the hydraulic circuit in accordance with the reduction in the displacement of the first travel motor. After the vehicle speed has reached the switching threshold, the controller executes switching control to switch the clutch from an engaged state to a disengaged state.