摘要:
Estimated change in operating fluid volume within a primary fluid chamber over a predetermined period of time during gear change operation is calculated using a physical model. On the other hand, detected change in operating fluid volume within the primary fluid chamber over this predetermined period of time is calculated. Then the deviation of the detected change from the estimated change is calculated, and learning and correction of the difference between the characteristic stored in an electronic control unit and that of an actual flow control unit are performed based on this deviation.
摘要:
A shift control apparatus for a motor vehicle including an internal combustion engine and a continuously variable transmission (CVT) is provided for controlling the speed ratio of the CVT depending upon operating conditions of the vehicle. The control apparatus determines whether an electronic throttle valve of the engine is at fault or not, and restricts the speed ratio of the CVT when the throttle valve is at fault such that the input-side rotation speed of the transmission is variable within a range that is narrower than a range in which the rotation speed is variable during normal running of the vehicle. The range of the input-side rotation speed may be defined by the upper limit, or the lower limit, or both the upper limit and the lower limit.
摘要:
A hydraulic control apparatus for an automatic transmission of a motor vehicle, the transmission including a lock-up clutch, the apparatus including a lock-up clutch switching valve device which is operable for selectively placing the lock-up clutch in a fully released, a partially engaged, and a fully engaged state thereof; a hydraulic pressure producing device which produces a hydraulic pressure; an abnormality detecting device which detects an abnormality of at least one of the lock-up clutch and the lock-up clutch switching valve device; and a control device which, when the abnormality detecting device detects the abnormality, operates the hydraulic pressure producing device for one of (a) applying the hydraulic pressure, and (b) inhibiting the hydraulic pressure from being applied, to at least one of the lock-up clutch and the lock-up clutch switching valve device for forcibly placing the lock-up clutch in one of the fully released and fully engaged states thereof.
摘要:
A vehicle control device is a vehicle control device for a vehicle capable of coasting, in which when there is no acceleration or deceleration request to the vehicle while traveling, power transmission between an engine and drive wheels is cut off and the vehicle is allowed to travel by inertia, wherein in a state in which there is no acceleration or deceleration request to the vehicle while traveling and power is transmitted between the engine and the drive wheels, whether or not to implement the coasting is determined by comparing a required deceleration rate Dt which is estimated as a deceleration rate to be later required of the vehicle and a coasting deceleration rate Dn which is estimated as a deceleration rate during the coasting. Where it is determined to implement the coasting, power transmission between the engine and the drive wheels is cut off and the coasting is implemented, and where it is determined not to implement the coasting, power transmission between the engine and the drive wheels is maintained. As a result, the implementation of coasting that can provide a sense of anxiety or discomfort to the driver can be suppressed.
摘要:
A driving force control apparatus includes a driver model which is a functional block adjusting characteristics relevant to human senses and a powertrain manger which is a functional block adjusting vehicle's hardware characteristics. The driver model includes a target base driving force calculation unit (static characteristics) calculating a target driving force from an accelerator pedal position using a base driving force map or the like, and a target transient characteristics addition unit calculating a final target driving force from the target driving force using transient characteristics represented by a transfer function. The powertrain manager includes a target engine torque and AT gear calculation unit and a characteristics compensator compensating for response of the vehicle.
摘要:
A vehicle control device includes an accelerator pedal adjusted in degree of operation, thereby adjusting power generated by an engine as a power source when running a vehicle. In the vehicle control device, in order to enhance fuel economy more reliably, fuel cut is carried out when the degree of operation of the accelerator pedal is other than zero, that is, when an accelerator is not fully opened and the vehicle is decelerating, the fuel cut that is the control in which supply of fuel used for operating the engine is stopped. Thus, even if the accelerator is not fully closed, a quantity of fuel injected by a fuel injector, and hence fuel consumption can be reduced. Accordingly, fuel economy can be enhances more reliably.
摘要:
A braking/driving force control device includes an operating unit that executes an acceleration operation and a deceleration operation by an integral pedal, a stroke sensor that detects a stroke amount due to an operation of the operating unit, a load sensor that detects a load due to an operation of the operating unit, and a control unit that controls acceleration of a vehicle based on a stroke amount detected by the stroke sensor and further controls deceleration of a vehicle based on a load detected by the load sensor.
摘要:
A driving force control apparatus includes a driver model which is a functional block adjusting characteristics relevant to human senses and a powertrain manger which is a functional block adjusting vehicle's hardware characteristics. The driver model includes a target base driving force calculation unit (static characteristics) calculating a target driving force from an accelerator pedal position using a base driving force map or the like, and a target transient characteristics addition unit calculating a final target driving force from the target driving force using transient characteristics represented by a transfer function. The powertrain manager includes a target engine torque and AT gear calculation unit and a characteristics compensator compensating for response of the vehicle.
摘要:
A control apparatus and method for an automatic transmission, by which a shift is executed by simultaneously controlling release and application of different friction engaging elements, are provided which i) control a clamping force of a friction engaging element to be released and a clamping force of a friction engaging element to be applied, ii) adjust an output torque of a prime mover for driving a vehicle, iii) detect a predetermined timing that is after the start of a torque phase during a shift of the automatic transmission and before the clamping force of the friction engaging element to be applied increases to the point at which torque input to the automatic transmission can be transmitted by only the friction engaging element to be applied, and iv) output a command to gradually reduce the clamping force of the friction engaging element to be released and a command to gradually increase the clamping force of the friction engaging element to be applied, in the torque phase.
摘要:
An apparatus including a slip control device for controlling an amount of slip of a lock-up clutch disposed between pump and turbine impellers in a power transmission system of a motor vehicle, such that an actual slip speed of the lock-up clutch coincides with a target slip speed, the apparatus comprising a hunting detecting device for determining the presence of a hunting defect if an amplitude of variation of the engine speed is larger than a predetermined first reference while an amplitude of variation of the turbine speed is not larger than a predetermined second reference.