摘要:
In an automatic speed change control system for a vehicle wherein a transmission is operated by use of an actuator, to contrive an alleviation of the burden in a shifting operation made by the user after a system starting operation. A shift actuator for controlling the speed change operation of the transmission is provided in a power transmission path. When the transmission is not in a neutral condition at the time when a predetermined system starting operation is conducted, the shift actuator is operated so as to put the transmission into the neutral condition.
摘要:
A clutch control apparatus for a vehicle provided with a hydraulic clutch in the middle of a power transmission path between an engine and a drive wheel. Before the clutch of the vehicle is brought into an engagement state, intermittent hydraulic pressure Y is applied to the clutch while maintaining the clutch in a disengagement state, and thereafter a predetermined hydraulic pressure is applied to the clutch to bring it into the engagement state. A solenoid valve is provided to control hydraulic pressure supplied to the clutch. Before the clutch is brought into the engagement state, a pulsed drive current D is supplied to the solenoid valve. The clutch control apparatus so configured suppresses a motion delay at the time of engaging the clutch, thereby allowing a quick and smooth start and shifting of the clutch.
摘要:
A transmission control device of a motorcycle can detect a predetermined traveling state based on the difference in rotational speed between a front wheel and a rear wheel, and can execute a shift-change control suitable for the traveling state. A transmission control device of a motorcycle includes a shift-change control instruction part that performs an automatic shift change of an AMT (automatic manual transmission) in response to at least vehicle-speed information. A first sensor detects a rotational speed of a front wheel, which constitutes a driven wheel. A second sensor detects a rotational speed of a rear wheel, which constitutes a drive wheel. A rotational-speed-difference detector detects the difference in rotational speed between the front wheel and the rear wheel. The control part inhibits the automatic shift change when the rotational speed of the rear wheel becomes larger than the rotational speed of the front wheel by a predetermined value or more.
摘要:
A twin clutch transmission for reducing the frequency of hit noise occurring in a dog clutch when shifting from neutral to a first speed. The twin clutch transmission includes a plurality of pairs of gears according to the number of speed stages between dual-structured main shafts and a countershaft. A twin clutch is disposed on the main shafts wherein a rotational drive force of an engine is transferred or blocked. A transmission between adjacent speed change gears on each shaft by a dog clutch occurs with a shift drum for switching between an engagement condition of the dog clutch by driving a shift fork. The patterns of guide grooves in the shift drum are formed wherein the dog clutches for a first speed gear and a second speed gear engage simultaneously when the shift drum is rotated by predetermined angles to shift from neutral to the first speed.
摘要:
A clutch control apparatus for a vehicle provided with a hydraulic clutch in the middle of a power transmission path between an engine and a drive wheel. Before the clutch of the vehicle is brought into an engagement state, intermittent hydraulic pressure Y is applied to the clutch while maintaining the clutch in a disengagement state, and thereafter a predetermined hydraulic pressure is applied to the clutch to bring it into the engagement state. A solenoid valve is provided to control hydraulic pressure supplied to the clutch. Before the clutch is brought into the engagement state, a pulsed drive current D is supplied to the solenoid valve. The clutch control apparatus so configured suppresses a motion delay at the time of engaging the clutch, thereby allowing a quick and smooth start and shifting of the clutch.
摘要:
An automatic gear shifting control device of a vehicle can execute an automatic gear shifting control in response to a larger rotational speed. The automatic gear shifting control device includes a gear shifting control instruction part that executes an automatic gear shifting operation of an AMT in response to at least vehicle-speed information. First and second sensors detect rotational speed of front and rear wheels. A rotational-speed-difference detector detects the difference in rotational speed between the front and rear wheels based on information from the first and second sensors. The control part is configured to execute an automatic gear shifting control in response to the vehicle-speed information calculated based on the larger rotational speed out of the rotational speed of the front wheel and the rotational speed of the rear wheel when the difference in rotational speed is detected by the rotational-speed-difference detector.
摘要:
Oil pressure detecting means 150 detects a clutch oil pressure in driving a clutch in its engaging direction against a biasing force of a return spring 12 for normally disengaging the clutch. Stroke end detecting means 140 detects that the clutch has reached a stroke end position where clutch disks are in contact with each other when the amount of change in clutch oil pressure becomes larger than a predetermined value. Clutch control correction amount calculating means 130 calculates a work load generated in the return spring 12 according to the clutch oil pressure detected at the stroke end position and then calculates a control correction amount for the clutch according to the difference between the work load calculated above and a predetermined reference value.
摘要:
In a clutch control system for a vehicle having a hydraulic type clutch in the course of power transmission between an engine and a drive wheel the operational response of the clutch is enhanced and the influence of a hysteresis present in oil pressure-stroke characteristic is suppressed. When the clutch is disconnected, a control oil pressure thereof is maintained at a predetermined stand-by oil pressure (allowance compensating oil pressure) P1. At the time of connecting the clutch, the control oil pressure is increased to a predetermined connection oil pressure P2. In bringing the clutch from the connected state into the disconnected state, the control oil pressure is lowered to an oil pressure P3 being below the stand-by oil pressure P1 and being near 0, and is thereafter increased again to the stand-by oil pressure P1.
摘要:
A twin clutch type speed-change apparatus applies a dog clutch to speed-change gears slid on a main shaft and a counter shaft for changing the number of speed-change steps. A twin clutch type speed-change apparatus includes a transmission having a plurality of gear pairs between a main shaft and a countershaft and a twin clutch. The rotational drive force of the engine is connected/disconnected between the transmission and the engine by the twin clutch. A dog clutch with dog teeth and a dog hole is applied between an axially slidably attached slidable gear and an axially non-slidably attached non-slidable gear to select an on gear pair for transmitting the rotational drive gear, from a plurality of gear pairs in the transmission. Rotational drive force is transmitted between the slidable gear slid by a shift fork and the coaxially adjacent non-slidable gear by engagement of the dog clutch.
摘要:
In a twin clutch type speed change control system in which changeover of gear position is carried out by switching between a pair of clutches, to suppress the noises of clutch being in the disengaged condition during a normal operation with a fixed gear position. In the twin clutch type speed change control system, changeover of gear position between an odd-ordinal gear position and an even-ordinal gear position is effected by disengaging an engaged clutch and engaging a disengaged clutch. During the normal operation with a fixed gear position, the clutch being in the disengaged condition is supplied with a minute oil pressure toward the clutch engaging side, whereby the clutch is moved by a minute amount toward the clutch engaging side.