A hydraulic circuit may include a proportional control solenoid valve controlling hydraulic pressure such that an operating hydraulic pressure required by the friction member is supplied to the friction member; a supply hydraulic path connecting the proportional control solenoid valve with the friction member, and adapted to supply hydraulic pressure controlled by the proportional control solenoid valve to the friction member; and a switch valve disposed in the supply hydraulic path so as to selectively open/close the supply hydraulic path

Hydraulic circuit for automatic transmission

A hair removal apparatus with a housing and an actuator head movable in the housing. The actuator head accommodates an actuator system that removes the hairs and is adapted to be driven by an electric drive mechanism arranged in the hair removal apparatus. The actuator system is movable into at least one active position for hair treatment. According to the invention, the actuator head is freely rotatable in the housing about an axis of rotation for adjustment of an active position. Using a single hair removal apparatus it is thus possible to employ various hair treatment systems such as long-hair cutter, short-hair cutter, or epilator, requiring only the actuator head to be turned about its bearing axis until the cutting unit provided for the respective hair treatment operation is turned into the actuator plane. Since several hair treatment operations can be performed with just one apparatus, manufacturing costs can be reduced.

Hair-removing device

The invention relates to a dual clutch transmission comprising a first clutch, which is hydraulically actuated by a first hydraulic cylinder, and a second clutch, which is hydraulically actuated by a second hydraulic cylinder, in addition to several hydraulically actuated shift cylinders for shifting gears which can be pressurised by means of a shift valve arrangement. The first hydraulic cylinder, the second hydraulic cylinder and the shift valve arrangement are connected to the pressure side of a pressure device by means of safety valves which are actuated in unison.

Hydraulic control for a dual clutch transmission

The present invention comprehends a plurality of embodiments of a hydraulic control system for various configurations of dual clutch transmissions. The hydraulic control systems all include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios.

Hydraulic control systems for dual clutch transmissions

Powertrain configurations for hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV) are disclosed herein. One powertrain comprises: a prime mover; an electric motor-generator, said electric motor-generator mechanically coupled to said prime mover via a first clutch; an electric motor, said electric motor mechanically coupled to said electric motor-generator via a second clutch; a battery, said battery electrically coupled to said electric motor-generator and said electric motor, said battery capable of supplying electrical energy to said electric motor-generator and said electric motor; and a controller, said controller capable of supplying control signals to said prime mover, said first clutch, said electric motor-generator, said second clutch and said electric motor such that said controller is capable of dynamically affecting a plurality of operating modes; wherein further said plurality of operating modes comprises one of a group, said group comprising: all electric mode, series mode, series-parallel mode and parallel mode.

Powertrain configurations for two-motor, two-clutch hybrid electric vehicles

The invention relates to a hydraulic system comprising a multi-flow, especially dual-flow, hydraulic pressure supply unit, such as a pump, by which means a volume flow is supplied to a consumer. The invention is characterised in that a valve arrangement is provided for switching between the individual pump flows and/or for interconnecting the individual pump flows.

Hydraulic system and automatic gearbox

A method, and apparatus in the form of a hydraulic unit, for triggering at least one clutch in a hydraulic circuit for an axle transmission of a vehicle. The method and apparatus make it possible to simply and very quickly make available an adequate amount of working fluid at the required pressure to at least one clutch, according to the driving situation, in order to close the clutch.

Method and apparatus for controlling a motor vehicle clutch

The arrangement comprises a first sliding valve (64) with a control inlet working with the control pressure and a system pressure inlet working with the pressure of the system. There are also two outlet areas, each of them either connected to the control inlet or the system pressure inlet while the other is connected to the complementary device and vice versa, depending on the pressure present at the control inlet. A valve arrangement (66, 68) for a selective operation of the shift cylinders (SZ1, SZ8) is attached to the outlets of the sliding valve (64).

Arrangement for control of several hydraulic shift cylinders and hydraulic supply system for dual clutch operated transmission unit

An active roll stabilization system of a vehicle having an axle with at least two wheels, wherein the axle is provided with a roll stabilizer that is actuated by means of a hydraulic device. The hydraulic device is actuated and controlled by at least one pressure control valve with a preselected pressure level by a pressure supply device, such as a pump. In order to reduce the costs for producing such an active roll stabilization system, the pressure control valve is pilot-operated by a pressure control pilot valve.

Manfred Homm

Papers

Hydraulic control for a dual clutch transmission

Hydraulic system and automatic gearbox

Method and apparatus for controlling a motor vehicle clutch

Arrangement for control of several hydraulic shift cylinders and hydraulic supply system for dual clutch operated transmission unit

Active roll stabilization system