A transmission assembly for a powertrain of a vehicle, includes, a control device and a transmission housing for housing a transmission, the control device mountable to the transmission housing and including a transmission mounting surface adapted to face the transmission housing, the transmission housing including a control device mounting surface adapted to face the control device, one of the transmission mounting surface and the control device mounting surface including a groove including at least a first and a second step deeper than the first step, and the other of the transmission mounting surface and the control device mounting surface including an outwardly extending guiding member configured to be received in the groove, configured so that the outwardly extending guiding member can slide in the first step until it reaches the second step, whereafter the transmission mounting surface can be moved towards the control device mounting surface or vice versa.

A power split and creep drive system for street sweeper or like specialty vehicle having a single engine is disclosed. The system intends to retrofit and convert on-highway truck chassis into specialty vehicles capable of performing work function and moving at creeping speed, such as a street sweeper. It includes a hydraulic work circuit or power-take-off (PTO) port, a planetary gear set, a hydraulic system comprising pumps and motors to drive the working devices and balance the demand between propulsion and work function such as sweeping. The planetary gear set includes an input shaft connecting to a transmission output shaft of the chassis, a first output shaft connecting to a hydraulic machine, and a second output shaft to vehicle propulsion drive shaft.

The invention relates to a flexible transmission components for a harmonic drive comprising a resilient toothing element formed as a sheet metal part and having external toothing, and a printed circuit board bonded to the toothing element.

Embodiments of the present disclosure provide a transmission spool valve/valve body arrangement facilitating the manufacturing of the valve body chambers accommodating the spool valves. Specifically, embodiments of the present disclosure provides a valve body having a common datum from which machining for each valve cavity formed through a particular face of a valve body can be referenced. In particular embodiments of the disclosure, a spring biases a solenoid assembly for each valve against a datum (common or otherwise). In more particular embodiments of the disclosure, the spring biases the solenoid assembly in a direction opposite to the direction of actuation of the spool valve upon actuation of the solenoid assembly. The spring bias positively displaces the solenoid assembly to the datum for precision location of the solenoid relative to the various hydraulic ports of the respective valve chamber. A variety of spring clip arrangements are provided to index the solenoid to the valve body.

A hydraulic control device for an auto transmission may include: an oil pump unit configured to supply oil; a line pressure control unit configured to form line pressure using the oil supplied from the oil pump unit; a lubricating pressure control unit configured to form lubricating pressure using the oil passing through the line pressure control unit; a reducing pressure control unit configured to form reducing pressure using the oil passing through the lubricating pressure control unit; a damper control pressure control unit configured to form damper control pressure using the oil supplied from the oil pump unit; a switch unit configured to supply the lubricating pressure or the reducing pressure to a torque converter; a collection unit configured to collect the lubricating pressure; and a retention unit connected to the switch unit, and configured to retain the lubricating pressure of the torque converter.

Methods and systems are provided for controlling engine operation in response to a request to shift a transmission gear. In one example, a method may include maintaining operating conditions of an engine and redirecting electric power generated via the engine from a traction motor to a battery in response to a request to shift a transmission while the driveline is operating in a series mode. In this way engine efficiency may be improved and a time frame for shifting a transmission gear may be reduced responsive to a gear shift request while the powertrain is operating in series mode.

A gear shifting apparatus in a new energy vehicle includes a primary power transmission unit, a secondary power transmission unit, an intermediate shaft, an intermediate shaft gear, a first clutch unit, a second clutch unit, and a third clutch unit. The intermediate shaft gear is fixedly sleeved on the intermediate shaft, and the first clutch unit is disposed between the intermediate shaft and the primary power transmission unit. The second clutch unit is disposed between the intermediate shaft and the secondary power transmission unit. The third clutch unit is disposed between the primary power transmission unit and the intermediate shaft gear.

A hydraulic assembly for a vehicle transmission includes a hydraulic pump for providing a system pressure within a hydraulic circuit, a pressure accumulator for temporarily supplying pressure to the hydraulic circuit, and a valve assembly for charging the pressure accumulator after a predetermined pressure threshold value of the system pressure has been reached or exceeded. The valve assembly is hydraulically connected between the pump and the pressure accumulator.

An electric oil pump includes a motor part having a shaft; a pump part that is positioned on one side of the motor part and is driven by the motor part via the shaft and discharges oil; and a control part configured to control an operation of the motor part, wherein the motor part includes a rotor, a stator disposed to face the rotor, and a motor housing, wherein the pump part includes a pump rotor and a pump housing having a housing part, wherein the control part includes a plurality of electronic components and a board, the plurality of electronic components include a heat generating component, wherein the motor housing has a cylindrical part and a plurality of heat dissipating fins that extend from the cylindrical part, wherein the board has a first surface and a second surface, and the heat generating component is mounted on the second surface.

A dual clutch transmission for a motor vehicle, with a first sub-transmission, with a second sub-transmission, with a first clutch associated with the first sub-transmission, and with a second clutch associated with the second sub-transmission. The dual clutch transmission is designed to be shifted into a parking lock state, in which two gears of one of the sub-transmissions are simultaneously engaged, and in the lock state, the two gears of the one first sub-transmission are simultaneously engaged. A first gear wheel of a first of the gears, which is designed as loose wheel and rotatably arranged on a first shaft of the dual clutch transmission, is connected in a torque-proof manner to the first shaft, by a first switching element.