摘要:
An oil pressure control apparatus for an automatic transmission helps ensure sufficient oil pressure to be supplied to a friction engagement element for performing at least either a first shift stage or a reverse shift stage. Further, the oil pressure control apparatus for the automatic transmission effectively performs pressure adjustment of the oil pressure to be supplied to the friction engagement element upon shifting a neutral shift stage to either the first shift stage or the reverse shift stage.
摘要:
In a vehicle transmission system including a transmission having an input shaft driven by an engine, an output shaft, and a clutch for controlling the transfer of torque from the input shaft to the output shaft, the clutch is controlled by sensing the speed of the engine and controlling engagement of the clutch according to the sensed engine speed. The system normally operates in a mode wherein clutch engagement is controlled according to the position of a clutch pedal. An auto-clutch mode, wherein engine speed controls clutch engagement is invoked when the transmission is in gear, brake pedals are depressed, and the engine speed is less than a predetermined speed.
摘要:
In an apparatus for controlling a starting clutch of a vehicle having a function of stopping engine idling so that an engine is automatically stopped, the starting clutch being provided in a transmission of the vehicle in series with a belt type continuously variable transmission mechanism, a load is applied to the transmission mechanism before a rise in a side pressure of the drive pulley and the driven pulley at the time of vehicle start-up from the state of engine stopping, resulting in a slipping of the belt. To avoid such a slipping, at the time of vehicle start-up from the state of engine stopping, the engaging force of the starting clutch is prevented from increasing above the creeping force which gives rise to the creeping of the vehicle until after a lapse of a predetermined time. In the course of increasing the engaging force of the starting clutch above the creeping force, the speed of rise in the engaging force of the starting clutch is limited to a relatively low speed until after the lapse of the predetermined time. The occurrence of belt slipping due to a delay in the increase in the pulley side-pressure is thus prevented.
摘要:
A device for overload protection and for braking a machine part driven by a motor (2), in particular, a tool driven by a cam gear in a stamping and/or bending machine, comprises a module (3), an overload clutch (4) disengaging after exceeding a torque threshold, and a freewheel (6) which, during the braking of the drive shaft (1) blocks in the direction of drive, each being arranged on the drive shaft (1) behind one another in the drive line extending from the motor (2) to the machine part.
摘要:
A control system for variable torque distribution for a four-wheel-drive vehicle with a system for brake control that is possible because of wheel-selective brake intervention wherein a non-variable longitudinal lock with specified torque distribution ratio is provided. If no slip is present, a symmetrical braking intervention is made at the wheels of the axle whose torque transmission percentage will be reduced in comparison to the other axle by changing the torque distribution ratio between the wheels of the rear axle and the wheels of the front axle.
摘要:
A method for controlling shifts of an auto vehicle transmission is disclosed to determine a forward running shifting process and then perform forward running operations if a range switch of the shift lever is made according to a backward running vehicle driver's intention to run forwards, after the driver considers brake pedal manipulation, the engine idle and vehicle's backward running speed at the time of a R→D range switch of the shift lever, thereby preventing the changing shift shock and reduction in strength that may be caused by wear or loss of friction elements, the method including the steps of: discriminating whether a R→D range switch signal has been input while the vehicle is running backwards; detecting the vehicle's running state if the R→D range switch signal has been input; discriminating whether the first speed shifting conditions are satisfied when the detected running states of the vehicle have been determined as follows: a brake switch is turned off, and the running speed is greater than 0 Kph; and performing the first shifting process if all the first speed shifting conditions have been fully satisfied.
摘要:
A braking force retaining unit, which retains braking force until driving force for starting a vehicle increases to a certain value such that the braking force continues to act on the vehicle after releasing a brake pedal, wherein said braking force retaining unit having a device for decreasing the braking force in accordance with the increasing driving force.
摘要:
A first sensor detects whether an engine revolution speed change exceeds a predetermined amount, and a second sensor detects whether an accelerator opening stays within a predetermined range. A controller determines a target amount of fuel injection that is greater than a basic amount of fuel injection when the engine revolution speed change exceeds the predetermined amount and the accelerator opening stays in the predetermined range. The basic amount of fuel injection is determined based on the accelerator opening and engine revolution speed. By feeding a slightly larger amount of fuel than the basic value while an engine brake is applying, the engine revolution speed change is suppressed and shock upon clutch engagement is reduced.
摘要:
Provision of a new gear parking brake of a power transmission device that enables the simple achievement of in-gear parking. A gear parking brake (31) of a power transmission device has a fluid coupling (4) positioned on the engine side and a friction clutch (5) positioned on the transmission (2) side, arranged in series. This gear parking brake (31) is provided with a brake mechanism on an input shaft (3) of the transmission (2), which activates at the time of parking. Even though the friction clutch (5) becomes disengaged, the rotation of the input shaft (3) of the transmission (2) is restricted, thereby enabling in-gear parking.
摘要:
In an apparatus for controlling a starting clutch of a vehicle having a function of stopping engine idling so that an engine is automatically stopped under given conditions when the vehicle is at a standstill, the starting clutch being disposed in a transmission of the vehicle in series with a belt type continuously variable transmission mechanism which receives an input of a power from the engine through a power transmission mechanism having built therein hydraulically operated frictional engaging elements, 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 of the drive pulley of the transmission mechanism has increased to a predetermined speed, the control mode of the starting clutch is switched from the waiting mode in which the engaging force of the starting clutch 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 is increased above the creeping force.