摘要:
A vehicle driven by a driving motor including an engine (1) and a transmission (3) comprises a driving force control unit (DCU), and a driving motor stopping unit, the driving force control unit (DCU) allowing transmission of a creep driving force from the driving motor to driving wheels of the vehicle regardless of releasing an accelerator pedal under or equal to a predetermined vehicle speed when the transmission is selected to a running range, the driving force control unit (DCU) being adapted to switch the creep driving force between a strong condition and a weak creep condition (F_WCRPON) in accordance with depression of a brake pedal (BP), the strong condition including a strong creep condition (F_SCRPON) and a strong creep condition for driving (F_MSCRPON), the creep driving force being adjusted to be less in the strong creep condition for driving (F_MSCRPON) than in the strong creep condition (F_SCRPON), the driving motor stopping unit (DCU) enabling an automatic engine stop operation for automatically turning off the engine (1) while the vehicle stops, if the creep driving force is adjusted to be in the weak creep condition (F_WCRPON).
摘要:
A brake fluid pressure retaining unit (RU) for retaining brake fluid pressure within a wheel cylinder (WC) after releasing a brake pedal (BP) is disclosed. The brake fluid pressure retaining unit comprises a brake fluid pressure reduction speed control means for retaining reduction speed of the brake fluid pressure within the wheel cylinder less than that of brake pedal load applied by a driver. The brake fluid pressure reduction speed control means may be formed by a restriction (D) in a brake fluid pressure circuit arranged between a master cylinder (MC) at which the brake fluid pressure is generated in accordance with a brake pedal load applied by the driver and the wheel cylinder.
摘要:
A vehicle driven by a driving motor including an engine (1) and a transmission (3) comprises a driving force control unit (DCU), and a driving motor stopping unit, the driving force control unit (DCU) allowing transmission of a creep driving force from the driving motor to driving wheels of the vehicle regardless of releasing an accelerator pedal under or equal to a predetermined vehicle speed when the transmission is selected to a running range, the driving force control unit (DCU) being adapted to switch the creep driving force between a strong condition and a weak creep condition (F_WCRPON) in accordance with depression of a brake pedal (BP), the strong condition including a strong creep condition (F_SCRPON) and a strong creep condition for driving (F_MSCRPON), the creep driving force being adjusted to be less in the strong creep condition for driving (F_MSCRPON) than in the strong creep condition (F_SCRPON), the driving motor stopping unit (DCU) enabling an automatic engine stop operation for automatically turning off the engine (1) while the vehicle stops, if the creep driving force is adjusted to be in the weak creep condition (F_WCRPON).
摘要:
A power transmission comprises an engine E with a plurality of cylinders, a belt-type continuously variable transmission CVT, which changes the rotational speed being transmitted from the engine, a control valve CV, which variably sets the line pressure used for controlling the speed change ratio of the transmission, and an electrical control unit ECU, which calculates the torque of the output shaft of the engine when the engine is decelerating in a partial cylinder operation mode. While a vehicle equipped with this power transmission is decelerating with the engine being in a partial cylinder operation mode, the control valve CV sets the line pressure in correspondence to the torque of the engine output shaft calculated by the electrical control unit ECU.
摘要:
In an apparatus for controlling a starting clutch (7) of a vehicle having a function of stopping engine idling so that an engine (1) is automatically stopped under given conditions when the vehicle is at a standstill, the starting clutch (7) being disposed in a transmission of the vehicle in series with a belt type continuously variable transmission mechanism (5) which receives an input of a power from the engine through a power transmission mechanism having built therein hydraulically operated frictional engaging elements (64, 65), the vehicle start-up from the state of engine stopping is made smoothly at a good response. At the time of vehicle start-up from the state of engine stopping, when the rotational speed (NDR) of the drive pulley (50) of the transmission mechanism (6) has increased to a predetermined speed (YNDR2), the control mode of the starting clutch is switched from the waiting mode in which the engaging force of the starting clutch (7) is kept below a creeping force which causes the vehicle to creep, to a running mode in which the engaging force of the starting clutch (7) is increased above the creeping force.
摘要:
At the time of vehicle start-up from the state of engine stopping, a hydraulic oil pressure (PSC) in a starting clutch (7) sometimes overshoots beyond a creeping pressure as a result of a rise in the hydraulic oil pressure in the hydraulic circuit, resulting in shocks. A hydraulic oil pressure command value (PSCCMD) to a linear solenoid valve (15 3 ) which controls the starting clutch pressure (PSC) is made smaller than the creeping pressure until the point of time at which the rise in the hydraulic oil pressure in the hydraulic circuit (= the point of time at which a condition of F2 = 1 is satisfied). Once a discrimination of a rise in the hydraulic oil pressure has been made, the command value is made higher than the creeping pressure for a predetermined period of time (i.e., for the period of YTM3 - YTM3B1), and is thereafter made to the creeping pressure.
摘要:
A driving force control unit for a vehicle, which allows transmission of driving force from a driving motor to driving wheels irrespective of releasing an accelerator pedal at a certain or lower vehicle speed when a transmission is selected to a running range, and which switches the magnitude of the driving force while the accelerator pedal is released at a vehicle speed no more than the certain vehicle speed between a greater condition and a smaller condition in accordance with depression of a brake pedal so that the driving force is made lower at a depression of the brake pedal than at a release of the brake pedal, wherein the driving force value in said greater condition at a certain or lower vehicle speed is changed according to the vehicle speed, and the change of the driving force value is characterized in that the driving force value becomes smaller as reaching from the vehicle speed at the maximum driving force value to said certain vehicle speed, and further switching said driving force, before stopping the vehicle, from said greater condition to said smaller condition is permitted merely in the vicinity of said certain vehicle speed.