摘要:
A vehicular drive control apparatus provided with pulse-driving and gliding means for setting upper limit Vhi and lower limit Vlo of running speed V of a vehicle according to an upper and lower vehicle speed limit maps, and on the basis of target running speed Vt which is the running speed V at a time when control initiating conditions have been satisfied, and running the vehicle in P & G running mode by alternately repeating pulse-driving run (accelerating run) and gliding run (decelerating run) of the vehicle at the running speed V varying between the set upper and lower limits Vhi and Vlo, the control initiating conditions including a condition that the vehicle is in a steady running state.
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 vehicular drive control apparatus provided with pulse-driving and gliding means 118 for setting upper limit Vhi and lower limit Vlo of running speed V of a vehicle according to an upper and lower vehicle speed limit maps, and on the basis of target running speed Vt which is the running speed V at a time when control initiating conditions have been satisfied, and running the vehicle in P & G running mode by alternately repeating pulse-driving run (accelerating run) and gliding run (decelerating run) of the vehicle at the running speed V varying between the set upper and lower limits Vhi and Vlo, the control initiating conditions including a condition that the vehicle is in a steady running state. Accordingly, the pulse-driving and gliding means 118 permits the vehicle to be run in the P & G running mode, independently of an automatic cruising control, making it possible to improve fuel economy. The apparatus is further provided with learning means 114 for compensating the upper and lower vehicle speed limit maps for reducing a range of variation of the running speed V during the subsequent vehicle running in the P & G running mode, when the amount of variation of the accelerator pedal operation amount Acc during the present vehicle running in the P & G running mode has become equal to or larger than a predetermined upper limit. Accordingly, the learning means 114 permits the vehicle to be run in the P & G running mode at the running speed V varying within a range specific to the vehicle operator, which is as broad as possible to the extent that the vehicle operator does not recognize a rise and a drop of the running speed V in the P & G running mode, irrespective of a difference of the characteristics of the individual vehicle operators regarding the range of variation of the running speed V, so that the fuel economy can be effectively improved.
摘要:
A compact sensing device capable of sensing a rotational angle and a rotational velocity, or a rectilinear moving distance and a moving velocity. A displacement sensing device that senses a rotational angle of a moving member rotation and a distance of a linear movement of the moving member, or senses an angular velocity of the moving member rotation and a velocity of a linear movement of the moving member, includes: a first movable member, moved together with the moving member by a linear movement of the moving member; a second movable member holding the first movable member in a rotatable manner, and rotated together with the moving member by rotation of the moving member; a first sensor outputting a signal in accordance with a linear movement of the first movable member; and a second sensor outputting a signal in accordance with a rotation of the second movable member.
摘要:
A gear shift control apparatus for an automatic transmission includes: a gear-shift-state-determining unit for determining the presence or absence of a gear-shift-determination of the automatic transmission; a gear-shift-time-estimating unit, when there is the gear-shift-determination, for estimating gear-shift-completion-time since the present gear is shifted to another gear and, after that, further shifted to the present gear; a fuel-consumption-estimating unit for estimating a first fuel consumption in the case where the vehicle drives for the gear-shift-completion-time in the present gear and a second fuel consumption in the case where the present gear is shifted to another gear and, after that, further shifted to the present gear; and a fuel-consumption-determining unit for determining validity of the gear shift on the basis of fuel consumptions. A gear-shift-control unit changes the determination of shifting to another gear at the time of the gear-shift-determination in accordance with a determination result of the fuel-consumption-determining unit.
摘要:
A control apparatus and method control a torque of an engine coupled to an input shaft of an automatic transmission during a shift by that automatic transmission. A torque-down control by which the engine torque is decreased by a predetermined amount is performed, a torque-restore control starting point at which time torque-restore control is to be started is determined, and the torque-restore control so as to gradually restore the engine torque to a value before the torque-down control was performed is started at the torque-restore control starting point. The torque-restore control starting point is determined according to a dynamic model which simulates behavior of the automatic transmission over time from start of the torque-down control, so that a rotational speed of the input shaft of the automatic transmission at a target point substantially matches a target speed.
摘要:
An automatic transmission of a vehicle including a speed change gear mechanism including rotary members such as gears and gear carriers and hydraulically operated friction engaging means and adapted to provide various speed stages according to selective engagement and disengagement of the friction engaging means is controlled by such steps as detecting rotation speed of at least one of the rotary members during a shifting between the speed stages, changing hydraulic pressure of at least one of the friction engaging means during a first phase of the speed stage shifting so as to make the rotation speed of the one rotary member follow a first change performance curve calculated according to a first feedback control program, and changing the hydraulic pressure of the one friction engaging means during a second phase of the speed stage shifting so as to make the rotation speed of the one rotary member follow a second change performance curve calculated according to a second feedback control program in continuity to the first change performance curve.
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 compact sensing device capable of sensing a rotational angle and a rotational velocity, or a rectilinear moving distance and a moving velocity. A displacement sensing device that senses a rotational angle of a moving member rotation and a distance of a linear movement of the moving member, or senses an angular velocity of the moving member rotation and a velocity of a linear movement of the moving member, includes: a first movable member, moved together with the moving member by a linear movement of the moving member; a second movable member holding the first movable member in a rotatable manner, and rotated together with the moving member by rotation of the moving member; a first sensor outputting a signal in accordance with a linear movement of the first movable member; and a second sensor outputting a signal in accordance with a rotation of the second movable member.