摘要:
A pressure regulating valve in a hydraulic control system for an automatic transmission according including a pressure regulating unit having a spool made slidable in a valve sleeve 10. An electromagnetic unit for causing a hollow core (or stator) is provided to attract a plunger (or movable element) arranged on a push rod communicating with the spool. The spool is moved by a spool moving mechanism in a direction to increase the flow from an input port to an output port to thereby raise an output pressure from an output port when the output pressure is lowered by a leakage. The spool position is controlled to control the output pressure in accordance with a balance among a spring force of spring means fitted in the valve sleeve, a feedback force resulting from the output pressure, and an electromagnetic attraction to be established in response to an electric signal provided to the electromagnetic unit having the hollow core and the plunger. In another embodiment, an input pressure feedback port is provided in the valve sleeve, and spool position control is additionally dependent upon an input pressure feedback force provided to the input pressure feedback port.
摘要:
A linear solenoid valve is composed of a pressure regulating section and an actuator section. In the pressure regulating section, a valve spool is slidably disposed and is biased in one direction by a single elastic member. The actuator section generates a thrust force and transmits that generated thrust force in an opposite direction to the pressure regulating section via a shaft. The actuator section is a movable magnet type linear actuator which includes three serially disposed coils and two permanent magnets disposed within the coils with like poles of the permanent magnets facing each other. The linear solenoid valve generates a stable control pressure which is large in proportion to input current, while generation of hysteresis and of radial load in the actuator section is avoided and responsiveness is improved.
摘要:
A vehicle control device and a vehicle are provided with compatibility between high grip performance and fuel efficiency. When a camber angle of a wheel is adjusted as a negative camber, the ground contact pressure on a first tread is increased and the ground contact pressure on a second tread is decreased, thus providing the high grip performance. On the other hand, when the camber angle of the wheel is adjusted as a positive camber, the ground contact pressure on the first tread is decreased and the ground contact pressure on the second tread is increased, thereby reducing rolling resistance and achieving fuel saving. By adjusting the camber angle of the wheel, compatibility can be provided between high grip performance and fuel saving which otherwise conflict with each other.
摘要:
The present invention provides a novel method for generating braking force in a wheel. In a vehicle having wheels, a wheel control device for controlling the wheels is provided with an actuator for performing an operation to vary a slip angle of the wheels, and a controller for controlling the actuator to increase the braking force of the wheels by increasing the slip angle absolute value of the wheels such that a lateral force is generated in the wheels relative to a ground contact surface of the wheels.
摘要:
A motor vehicle (1) having a body (2), a wheel (5) rotatably supported and coaxially disposed on the body (2), and an occupant riding portion (3) supported by the body (2) and mounted with an occupant, the motor vehicle including: body attitude detection means (121, 122) for detecting an attitude of the body; and body attitude control means (120) for controlling the body attitude detected by the body attitude detection means (121, 120), wherein, in response to an inertial force or a centrifugal force generated by acceleration, deceleration or a turning motion of the motor vehicle (1), the occupant riding portion (3) is moved so as to balance the inertial force or the centrifugal force. The motor vehicle (1) further includes occupant attitude control means (130) for controlling an attitude of the occupant riding portion (3) in accordance with a detection value detected by the body attitude detection means (121, 122).
摘要:
By bending and stretching a link mechanism, both left and right wheels of a vehicle can be inclined toward inside of cornering to generate a camber thrust as a lateral force, i.e. an increase in cornering force. Further, by bending and stretching the link mechanism, the passenger compartment can be inclined in accordance with inclination of a connecting link, and thus the center of gravity of the vehicle can be moved toward its inner wheel during cornering. By preventing lifting of the inner wheel during cornering, cornering performance is improved. Because the passenger compartment is inclined toward the inner wheel during cornering, centrifugal force is less likely to be felt by the occupant.
摘要:
A control system for a vehicular automatic transmission which detects running status of the vehicle and includes a shift controller for controlling the gear stage of the automatic transmission in accordance with the detected running status of the vehicle. The control system further includes a memory for prestoring road information for roads to be run by the vehicle, present location detection and running direction detection. A reader reads out the road information for a set route from the present location to a destination, from the memory, on the basis of the detected present location and the destination input. The engine power required for the vehicle to travel the set route is estimated in accordance with the read road information. A shift schedule which minimizes the fuel consumption on the set route is determined by comparing the estimated engine power requirement with a prestored mileage map and the shift control pattern is changed in accordance with the determined shift schedule.
摘要:
A three-way solenoid valve consisting of a solenoid device portion 20 and a valve portion 40. The same solenoid device portion 20 is used whether the valve is normally open or normally closed. The solenoid device portion 20 comprises a plunger 23 driven by a solenoid coil 27, a sleeve 26 guiding the plunger, a yoke 32 fitted over the sleeve, a push rod 24 mounted to the plunger. The valve portion 40 comprises an inner base 46 having a valve seat, an outer base 42 having a second valve seat, and a ball 48 mounted between the valve seats. The inner base is mounted on the outer base. The front end of the push rod can bear against the ball. The outer base 42 bears against the yoke 32.
摘要:
An automatic transmission comprising a fluid torque converter; a transmission gear comprising a first gear unit having three forward-speed gears and one reverse gear and a second gear unit having a high-speed gear and a low-speed gear; and a hydraulic control system comprising first and second shift valves for controlling the shifting between the speed gears of the first gear unit, a third shift valve for controlling the shifting between the high-speed gear and the low-speed gear of the second gear unit, a manual selector valve having five shift positions, i.e. D, I. L, R and P-position, and first, second and third solenoid valves related with the first, second and third shift valves respectively.The automatic transmission is capable of providing six forward-speed automatic transmission when the manual selector valve is shifted to the D-position, three forward-speed automatic transmission including the first, third and fifth speeds when the manual selector valve is shifted to the I-position, three forward-speed automatic transmission including the first, third and fifth speeds and allowing effective engine braking when the manual selector valve is shifted to the L-position, and two-speed reverse automatic transmission when the manual selector valve is shifted to the R-position.
摘要:
An electronically controlled automatic transmission control system for controlling an automatic transmission for a vehicle, comprising an electronic controller which receives functions on the basis of input signals corresponding to the running conditions of the vehicle to control a hydraulic controller including a fluid pressure source, shift control valves for changing over the connection of the fluid pressure source to the respective hydraulic servomotors of frictional engaging mechanisms which controls the operation of the components of a gear train included in the automatic transmission, solenoid valves adapted to be controlled by the electronic controller to change input signal pressures to the shift control valves and a manual selector valve having a spool capable of moving through predetermined set positions corresponding to the shift positions of the manual shift lever of the vehicle, in which the input signal pressure is supplied to one of the shift control valves, namely, 1-2 shift control valve, when the spool of the manual selector valve is shifted to a position corresponding to the neutral position, in order to improve the delayed operation of the automatic transmission in shifting the automatic transmission from the neutral or the parking position to the drive position.