Abstract: A running control device of a vehicle including an engine, a brake operation member, and a brake booster, is configured to execute an engine brake running mode performed with the engine coupled to wheels and an inertia running mode performed with an engine brake force made lower than that in the engine brake running mode. The running control device executes first and second inertia running modes. The first inertia running mode is terminated when a brake request amount becomes equal to or greater than a predefined first determination value while the first inertia running mode is performed. The second inertia running mode is terminated and a return to the engine brake running mode is made when the brake request amount becomes equal to or greater than a predefined second determination value larger than the first determination value while the second inertia running mode is performed.

Abstract: A running control device of a vehicle includes an engine with a plurality of cylinders, and a clutch connecting/disconnecting a power transmission path between the engine and wheels, the running control device of a vehicle performing during an inertia running mode a neutral inertia running mode performed with the power transmission path between the engine and the wheels disconnected while the engine is kept operated, and a cylinder resting inertia running mode performed by resting at least a part of the cylinders of the engine while the power transmission path between the engine and the wheels is connected, the running control device of a vehicle increasing an operation region of performing the neutral inertia running mode in an operation region of performing the inertia running mode when idle learning performed in an idle operation state of the engine is incomplete, as compared to after completion of the idle learning.

Abstract: A running control device is configured to execute an engine coupling running mode performed with an engine and wheels connected by a connecting/disconnecting device, a neutral inertia running mode performed with the engine separated from the wheels by the connecting/disconnecting device while the engine is supplied with fuel and allowed to perform self-sustaining rotation, and a free-run inertia running mode performed with the engine separated from the wheels by the connecting/disconnecting device while fuel supply to the engine is stopped to stop rotation. The neutral inertia running mode is terminated when an operation amount of the accelerator pedal becomes equal to or greater than a predefined first determination value. The free-run inertia running mode is terminated when an operation amount of the accelerator pedal becomes equal to or greater than a predefined second determination value larger than the first determination value.

Abstract: A running control system for vehicles is provided to reduce engagement shocks of a clutch and to raise the torque of drive wheels quickly upon satisfaction of a condition of engagement of the clutch. In a vehicle to which the running control system is applied, power transmission between an engine and the drive wheels is selectively enabled by the clutch. The running control system is configured to raise a speed of the engine from an idling speed if the clutch is expected to be engaged during coasting where the clutch is in disengagement to interrupt a torque transmission between the engine and the drive wheels.

Abstract: A vehicle control system is provided. The vehicle control system is applied to a vehicle comprising an engine having cylinders, a power transmission route between the engine and drive wheels, and a clutch selectively connecting and disconnecting the power transmission route. The vehicle control system disconnects the power transmission route during running to allow the vehicle to coast.

Abstract: A vehicle control system is provided. The vehicle control system is applied to a vehicle comprising an engine having a plurality of cylinders, a power transmission route between the engine and drive wheels and a clutch device adapted to selectively connect and disconnect the power transmission route, and that is configured to disconnect the power transmission route during running to allow the vehicle to coast.

Abstract: A controller is capable of controlling a coupled engine running mode, in which an engine is coupled to wheels and an engine brake is activated by driven rotation of the engine, and a coasting mode, in which an engine brake force is reduced with respect to that in the coupled engine running mode with mode with the engine brake on, and starts the coasting mode on the basis of the steering angle of a steering member. The controller starts the execution of a first coasting mode when the steering angle is equal to or less than a preset upper limit value and starts the execution of a second coasting mode when the steering angle is greater than the upper limit value. In the first coasting mode, the engine rotation is stopped, and in the second coasting mode, the engine remains rotating.

Abstract: In consideration of an amplification effect of a braking force at the time of brake operation, there is provided a difference between upper-limits (?, ?) of a brake operation force (Brk) with which the execution of free-run coasting and neutral coasting is started, on the basis of whether or not a brake booster (42) can be filled with a negative pressure. Therefore, while the braking force at the time of brake operation is secured, the range of the brake operation force (Brk) with which coasting is executed can be enlarged, and an improvement in fuel economy can be made.

Abstract: A vehicle control system is provided. The vehicle control system is applied to a vehicle having a clutch device to selectively connect and disconnect a power transmission route between a prime mover and drive wheels, and configured to disconnect the power transmission route during running to allow the vehicle to coast.

Abstract: An upper limit value of an upward gradient of a road surface for starting neutral coasting is set to be larger than an upper limit of the upward gradient of the road surface for starting free-run coasting, so, when the upward gradient is relatively large and a coasting distance is short, the vehicle is caused to travel in the neutral coasting, and stop and restart of the engine are not carried out. Therefore, a decrease in drivability of the vehicle is suppressed. When the upward gradient is relatively small and the coasting distance is long, the vehicle is caused to travel in the free-run coasting, and supply of fuel to the engine is stopped, so fuel economy of the vehicle is obtained. Thus, it is possible to achieve both fuel economy and drivability of the vehicle during coasting on an upward gradient.

Abstract: A drive control device for a vehicle including an engine and a clutch device provided in a power transmission path between the engine and a drive wheel includes: a normal traveling unit causing the vehicle to travel while the engine is connected to the drive wheel; a free-run coasting unit disconnecting the engine from the drive wheel during traveling and causing the vehicle to coast while the engine is stopped; a neutral coasting unit disconnecting the engine from the drive wheel during traveling and causing the vehicle to coast while the engine is autonomously operated; and a coasting switching control unit setting an upper limit value of an upward gradient of a road surface, at which the neutral coasting is stopped, such that the upper limit value is larger than an upper limit value of the upward gradient of the road surface, at which the free-run coasting is stopped.

Abstract: 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.

Abstract: A vehicle controller includes a lock-up clutch disposed to a power transmission path between an engine and a driving wheel, and a clutch configured to connect and disconnect the power transmission path, wherein at the time of switching driven traveling for causing a vehicle to travel by connecting the power transmission path and inertia traveling for causing the vehicle to travel by disconnecting the power transmission path, the lock-up clutch and the clutch are switched at switching start timings different from each other.

Abstract: When a state in which fuel supply to a combustion chamber of an internal combustion engine is cut is recovered, since a vehicle control device starts the fuel supply by controlling the internal combustion engine at the time that a requested driving force that is being requested becomes the same as an actual driving force that is being actually generated, the vehicle control device can appropriately start the fuel supply when the fuel cut state is recovered. When, for example, the deviation between the requested driving force and the actual driving force becomes within a preset and predetermined range, as the time at which the requested driving force that is being requested becomes the same as the actual driving force that is being actually generated, the vehicle control device starts the fuel supply.

Abstract: A vehicle control system includes a deceleration adjusting unit capable of adjusting deceleration of a vehicle with opening adjustment of an intake passage to an internal combustion engine which is a driving power source to drive the vehicle, power generation load adjustment of a power generation device to generate electric power using power of the internal combustion engine, and transmission ratio adjustment of a transmission to shift gears of power from the internal combustion engine; and a vehicle control device configured to adjust the deceleration by prioritizing the opening adjustment or the power generation load adjustment over the transmission ratio adjustment, when adjusting the deceleration by controlling the deceleration adjusting unit in accordance with an operation amount of braking/driving request operation during fuel-cut toward the internal combustion engine.

Abstract: 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.

Abstract: A speed-change mode is changed from a stepless speed-change mode to a fixed speed-change mode while limiting or controlling the torque variation of an output member. An ECU 100 performs speed-change control. In the speed-change control, if a request is provided to change the speed-change mode from the stepless speed-change mode to the fixed speed-change mode, the ECU 100 engages the clutch mechanism 350 after the rotational synchronization and the phase synchronization of the clutch mechanism 350. After engaging the clutch mechanism 350, the ECU 100 gradually reduces the output torque of a motor generator MG1 and gradually changes a reaction element from a sun gear 331 to a sun gear 341. At this time, the output torque of a motor generator MG2 is also gradually reduced.

Abstract: An excess voltage applied to a piezoelectric element is detected and controlled to improve durability and reliability of the piezoelectric element. A fuel injection control device for an internal combustion engine in which a power source voltage is boosted by a dc-dc converter and the so-boosted output voltage is supplied via a first choke coil and a first thyristor to a piezoelectric element for charging the piezoelectric element, the electric charge of which is subsequently discharged via a second thyristor and a second choke coil. The fuel injection control device includes a positive voltage detection unit for detecting an excess voltage arranged between the first choke coil and the first thyristor and a positive voltage control unit controlled by an output signal of the positive voltage detection unit and adapted for shorting both ends of the first choke coil. The current through the first thyristor is cutoff to prevent the excess voltage from being applied to the piezoelectric element.

Abstract: Piezoelectric element used in a fuel injection value is to be improved in its response to expansion and contraction, while the supply of an excess energy to the piezoelectric element is to be controlled. In a fuel injection control device in which an output voltage of the dc-dc converter is applied to a piezoelectric element via a choke coil and a thyristor, a current detection unit is provided between the dc-dc converter and the thyristor. A measured value of the electric charge, as found by integrating a charging current flowing through the current detection unit is compared by a comparator to a command value of electrical charges as found by processing the dc-dc converter output voltage. The results of comparison are supplied to a latch unit so as to be latched at the timing of a peak value of the charging current.

Abstract: A piezoelectric element drive device comprising a power condenser for charging the piezoelectric element. The discharging circuit for the piezoelectric element comprises a first discharging circuit having a discharging coil therein and connected to the ground, and a second discharging circuit having a discharging coil and connected to the power condenser. When the discharging operation of the piezoelectric element is started, the piezoelectric element is initially discharged to the ground via the first discharging circuit, and then the piezoelectric element is discharged to the power condenser via the second discharging circuit, to charge the power condenser.