Vehicle, method for controlling vehicle and controller for vehicle

A control method for a vehicle,

• the vehicle including:
• a drive source;
• a throttle valve configured to be opened to an adjustable degree to control an output of the drive source;
• a driving wheel driven by a driving force output from the drive source;
• a clutch disposed between the drive source and the driving wheel, the clutch being switchable to an arbitrary fastening position between a connection state enabling transmission of the driving force between the drive source and the driving wheel and a disconnection state disconnecting the transmission of the driving force;
• a clutch actuator configured to apply a fastening load to the clutch and to provide a torque transmission capacity corresponding to the fastening load to the clutch;
• and
• a controller configured to control an operation of the drive source and an operation of the clutch actuator, the controller including a drive source control circuit configured to electrically control a throttle opening degree of the throttle valve to control the output of the drive source,
• the method comprising:
• estimating a temperature of the clutch;
• performing a driving force adjustment control including adjusting the driving force transmitted to a downstream side of the clutch on a basis of an estimated temperature of the clutch;
• controlling the clutch actuator to achieve a fastening load balanced with the output of the drive source,
• wherein the driving force adjustment control includes controlling the throttle opening degree to be a closed-side throttle opening degree during the driving force adjustment control, the closed-side throttle opening degree being determined by multiplying a requested throttle opening degree corresponding to the operation amount of the drive source control circuit by a correction gain value determined by a correction gain function, and
• when the estimated temperature of the clutch exceeds the predetermined threshold temperature, the controller:
• sets the correction gain value to less than 1 using the correction gain function;
• controls the throttle opening degree to be the closed-side throttle opening degree lower than the requested throttle opening degree so that the driving force output of the drive source transmitted to the downstream side of the clutch is decreased;
• and
• controls the clutch actuator to achieve the fastening load balanced with the decreased driving force output of the drive source.

A controller of a vehicle,

• the vehicle including:
• a drive source;
• a throttle valve configured to be opened to an adjustable degree to control an output of the drive source;
• a driving wheel driven by a driving force output from the drive source;
• a clutch disposed between the drive source and the driving wheel, the clutch being switchable to an arbitrary fastening position between a connection state enabling transmission of the driving force between the drive source and the driving wheel and a disconnection state disconnecting the transmission of the driving force;
• and
• a clutch actuator configured to apply a fastening load to the clutch and to provide a torque transmission capacity corresponding to the fastening load to the clutch,
• the controller comprising:
• a drive source control circuit configured to electrically control a throttle opening degree of the throttle valve to control the output of the drive source;
• a clutch temperature estimation circuit configured to estimate a temperature of the clutch;
• and
• a driving force adjustment circuit configured to perform a driving force adjustment control to adjust the driving force transmitted to a downstream side of the clutch on a basis of an estimated temperature of the clutch;
• and
• a clutch actuator control circuit configured to control the clutch actuator to achieve a fastening load balanced with the output of the drive source,
• wherein the driving force adjustment circuit is configured to control the throttle opening degree to be a closed-side throttle opening degree during the driving force adjustment control, the closed-side throttle opening degree being determined by multiplying a requested throttle opening degree corresponding to the operation amount of the drive source control circuit by a correction gain value determined by a correction gain function, and
• wherein the controller is configured such that, when the estimated temperature of the clutch exceeds the predetermined threshold temperature:
• the driving force adjustment circuit sets the correction gain value to less than 1 using the correction gain function;
• the driving force adjustment circuit controls the throttle opening degree to be the closed-side throttle opening degree lower than the requested throttle opening degree so that the driving force output of the drive source transmitted to the downstream side of the clutch is decreased;
• and
• the clutch actuator control circuit controls the clutch actuator to achieve the fastening load balanced with the decreased driving force output of the drive source.