摘要:
A power transmission comprises a continuously variable transmission CVT, which transmits a rotational driving force from an engine E, a starting clutch 5, which variably sets the transmission capacity for the continuously variable transmission CVT, and a control valve CV, which controls the engagement operation of the starting clutch 5. While the engine E is in a partial cylinder operation mode, the control valve CV controls the engagement operation of the starting clutch 5 to attain a predetermined transmission capacity at a rotational speed of the engine that is higher than for a case of the engine in an all cylinder operation mode.
摘要:
A method for clutch (130) disengagement at idling running of a vehicle comprising an automated manual transmission is characterized in that a rate of said clutch (130) disengagement is controlled responsive to a brake pedal force applied to a brake pedal by a vehicle operator. A clutch (130) disengagement controller (C) controls a rate of clutch (130) disengagement at engine idling running mode. The clutch disengagement controller is connected to a brake pedal sensor (150) sensing a force applied to a brake pedal and to at least one air inlet valve (Vl; V2) controlling a position of a clutch cylinder (100). The controller (C) controls opening of said at least one air inlet valve (Vl; V2) responsive to the force sensed by said brake pedal sensor (150).
摘要:
A method for launching an automatic vehicle transmission utilizing dual clutches in place of a torque converter avoids clutch overheating, sudden launch or roll-back by placing a clutch in a slip mode only after the vehicle's brakes have been actuated and fully disengaging the clutch upon over-heating detection. When launch is initiated, a first gear engaged and the brakes are released, the associated clutch is fully engaged to avoid overheating.
摘要:
In a multiple-disc electromagnetic clutch control system and method, an overexcitation control is performed so as to adjust an intervening space between an electromagnet and clutch plates of a multiple-disc electromagnetic clutch to be within a predetermined range. This makes it possible to engage the multiple-disc electromagnetic clutch assuredly by a subsequent normal excitation control without the possibility of failing to attract the clutch plates to the electromagnet.
摘要:
A power transmission comprises a continuously variable transmission CVT, which transmits a rotational driving force from an engine E, a starting clutch 5, which variably sets the transmission capacity for the continuously variable transmission CVT, and a control valve CV, which controls the engagement operation of the starting clutch 5. While the engine E is in a partial cylinder operation mode, the control valve CV controls the engagement operation of the starting clutch 5 to attain a predetermined transmission capacity at a rotational speed of the engine that is higher than for a case of the engine in an all cylinder operation mode.
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:
The invention relates to a control system, in particular an emergency control system, of an automatic clutch. The clutch can operate with slip controlled by the driving speed when engaged, or can be disengaged or remain disengaged when the engine speed is excessive, and can also be disengaged when there is an idling signal.
摘要:
[Task] A required draining capacity of an electrically-powered oil pump is reduced and a small sizing of the electrically-powered oil pump is achieved by devising how to issue a starting frictional element engagement pressure command value. [Means for solving the problem] An engine is restarted in response to an idle stop OFF command at t1 so that a gear shift control purpose hydraulic pressure is raised according to a working oil from an engine driven oil pump. An idle stop release time control of the engine is allowed according to a torque down unnecessary determination when a gear shift control purpose hydraulic pressure has reached to a set hydraulic pressure at t2. In a case where this allowance causes an engine torque Te to be raised from a torque down value toward a driving operation corresponding value by a predetermined gradient ΔTe1, a command value of a starting frictional element engagement pressure P S is set to a control maximum value (a drain port opening angle of a clutch hydraulic pressure control valve for a clutch hydraulic pressure (an engagement pressure) command value is made small as compared with that in a case of an ordinary control (is made difficult to drain)) during the idle stop control including during the idle stop release time control. Thus, when starting frictional element engagement pressure P S is controlled upon receipt of this command value, the working oil from the electrically-powered oil pump is not needed to be drained. Consequently, the electrically-powered oil pump is not needed to discharge this draining working oil and the small-sizing can be achieved.
摘要:
A power transmission comprises a continuously variable transmission CVT, which transmits a rotational driving force from an engine E, a starting clutch 5, which variably sets the transmission capacity for the continuously variable transmission CVT, and a control valve CV, which controls the engagement operation of the starting clutch 5. While the engine E is in a partial cylinder operation mode, the control valve CV controls the engagement operation of the starting clutch 5 to attain a predetermined transmission capacity at a rotational speed of the engine that is higher than for a case of the engine in an all cylinder operation mode.