摘要:
A process is disclosed for the preparation and purification of 3-(4-hydroxyphenyl)-1,1,3-trimethylindan-5-ol. Accordingly, isopropenylphenol, its dimers or oligomers undergo isomerization in the presence of an acid catalyst, the reaction mixture is optionally neutralized by adding a base and 3-(4-hydroxyphenyl)-1,1,3-trimethylindan-5-ol is isolated by recrystallization.
摘要:
In a vehicle in whose drive train a manually shifted transmission with automated clutch actuation is located, in order to suppress improper actuations of the clutch, an inhibition time is applied to the signal activating an intended shifting function.
摘要:
In a method of controlling an automatic clutch arranged between an engine and a drive train of a vehicle in vehicle startup situations wherein the clutch is engaged to such a degree that only a small torque can be transmitted through the clutch and wherein the clutch is increasingly engaged when engine power output is increased, the clutch is immediately returned toward disengagement if, during vehicle startup, the engine power output requirements are suddenly reduced and, after a predetermined delay, the clutch is adjusted to the new situation that is to a standstill of the vehicle or to a renewed startup situation.
摘要:
The invention concerns an automatic clutch in a motor vehicle drive train with a manually operated gearshift. If an accelerator pedal or the like used to control the engine and a vehicle service brake are not activated, the clutch is set at a creeping moment when a gear is engaged and the engine is running. When the service brake is actuated, this creeping moment is maintained for a predetermined time interval, decreased or suppressed in a time-delayed manner.
摘要:
The invention concerns an automatic clutch in a motor vehicle drive train. During travel, the clutch is controlled with excess contact pressure such that the transmissible moment of the clutch exceeds the engine torque by a predetermined amount. At low speeds or in low gears and/or when travelling slowly, the amount of excess contact pressure is considerably reduced. At high speeds or in high gears and/or at when travelling fast, the clutch is set at the maximum transmissible moment.
摘要:
A power train in a motor vehicle has an automated clutch which is operated by a control unit by way of an actuator. The control unit receives signals from various parts of the engine, from the brake or brakes and from the transmission; such signals are processed and transmitted to the clutch by way of the actuator so that, when the vehicle is to carry out a crawling movement, the torque being transmitted by the then partly engaged clutch is properly related to the engine torque to ensure a predictable crawling movement of the vehicle regardless of eventual shifts of the operating point of the clutch and/or fluctuations of other parameters of the engine, transmission and/or clutch. The crawling movement can begin when the brake(s) is or are idle, the gas pedal is not depressed, and the engine is running; and crawling movement begins in response to shifting of the transmission into gear.
摘要:
A cam control between a brake pedal and an adjusting lever for actuating a locking device for a selector lever of an automatically shifting change gear is so designed that the moments resulting on the brake pedal from the actuation of the locking device are approximately zero in a narrow pivot-angle range of the brake pedal which contains the position of rest.
摘要:
An installation for damping vibrations in the drive connection of a motor vehicle by a vibration absorber which includes, in coaxial arrangement with the cardan shaft, an annular vibrating mass, a carrier flange adapted to be secured to the cardan shaft, and a resilient body of an elastomeric material which effects the vibration coupling of the vibrating mass with the carrier body of the carrier flange; stiffening elements are inserted into the resilient body which serve as stiffening elements effective in the radial direction; additionally apertures are provided in the resilient body on both sides of the stiffening elements which enable an intentional reduction of its torsional stiffness so that a resonant frequency rate f.sub.r /f.sub.t of 2.5 or more can be realized for the vibration absorber.
摘要:
The present invention relates to an apparatus and method for controlling a torque transmitting system and the torque transmittable by the torque transmitting system in a power train of a vehicle with a transmission and an engine, and with at least one actuator controllable by a control unit, such as an actuating unit, for operating the torque transmitting system. This is accomplished in that, in at least one operating state, such as starting or acceleration state, the control unit shifts between at least two operating states of the torque transmitting system in which the system transmitting different torques, so that a different, such as a higher or a lower, torque can be selected and transmitted in the respective operating states for providing a different, such as a higher or a lower, torque to power the vehicle.
摘要:
The present invention relates to an automatic clutch intended for an engine-transmission unit in a vehicle with random gear changing. The gearbox comes into action automatically as soon as it has recognized the driver's intentions. Furthermore, the gear lever shift, the speed and the engine torque of the vehicle as well as the brake system action are monitored. As soon as the gear lever has shifted and the speed or the torque has fallen sufficiently and/or the brake system is actuated, the clutch is released.