A vehicle drive includes a speed change mechanism connected to a rotary electric machine; an output member connected to the speed change mechanism and wheels; an engagement device changes a state of engagement between an input member connected to an engine and the speed change mechanism; a hydraulic pump driven by the engine or the rotary electric machine; a first pressure control device that controls pressure supplied from the pump and supplies the pressure to the speed change mechanism; a second, separate hydraulic pressure control device that controls the pressure supplied from the pump and supplies the pressure to the engagement device; and a case that houses the rotary electric machine, speed change mechanism, engagement device, and pump. At least the engagement device is housed in a space formed by the case, and the second hydraulic pressure control device is provided at a part of the case forming the space.

The present invention is a clutch plate attached to the inner surface of the impeller and/or turbine of a torque converter. The clutch plate supports friction material that enables the engagement of the turbine and impeller in the form of a turbine clutch. The clutch plate acts to relieve strain on the impeller shell when engagement occurs. In addition, the clutch plate provides an enlarged vertical surface to hold additional friction material.

The invention relates to a hydrodynamic machine, in particular a hydrodynamic coupling, having a bladed primary wheel and a stationary or revolving bladed secondary wheel, forming a working chamber in order to transmit torque hydrodynamically. The primary wheel and/or the secondary wheel is rotatably mounted by means of at least one plain bearing, which is lubricated by a lubricant source connected by way of at least one lubricant supply line, and a lubricant outlet which is connected by way of a lubricant discharge line, such that in the lubricant supply line and/or the lubricant discharge line a lubricant reservoir, connected to the at least one plain bearing by means of at least one lubricant feed conduit and at least one lubricant return conduit and therefor forming a lubricant circuit, is provided in the event of a failure of the lubricant supply from the lubricant source.

The invention relates to a hydrodynamic machine, in particular a hydrodynamic coupling, having a bladed primary wheel and a stationary or revolving bladed secondary wheel, forming a working chamber in order to transmit torque hydrodynamically. The primary wheel and/or the secondary wheel is rotatably mounted by means of at least one plain bearing, which is lubricated by a lubricant source connected by way of at least one lubricant supply line, and a lubricant outlet which is connected by way of a lubricant discharge line, such that in the lubricant supply line and/or the lubricant discharge line a lubricant reservoir, connected to the at least one plain bearing by means of at least one lubricant feed conduit and at least one lubricant return conduit and therefor forming a lubricant circuit, is provided in the event of a failure of the lubricant supply from the lubricant source.

A mixer drum driving device includes a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump for rotating the mixer drum for mixing by supplying pressure oil to the hydraulic motor independently of the hydraulic pump, and a direct-current brush motor for driving and rotating the auxiliary hydraulic pump. The auxiliary hydraulic pump is driven and rotated by the direct-current brush motor when the engine stops during the rotation of the mixer drum for mixing.

A mixer drum driving device includes a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump for rotating the mixer drum for mixing by supplying pressure oil to the hydraulic motor independently of the hydraulic pump, and a direct-current brush motor for driving and rotating the auxiliary hydraulic pump. The auxiliary hydraulic pump is driven and rotated by the direct-current brush motor when the engine stops during the rotation of the mixer drum for mixing.

Downhole electrical power generation apparatus and methods of using stored pressurized gas and/or ambient downhole pressure. One example comprises first and second fluid receiving chambers, a fluid communication path for allowing flow of fluid from the first chamber via the fluid communication path to the second chamber and a turbine generator disposed so that fluid flowing from the first chamber via the fluid communications path to the second chamber operates the turbine generator to generate electrical power.

A stator for use with a torque converter includes an inner annular shell, outer annular core, a plurality of stator blades and pressure-side fluid directing projections. The plurality stator blades are disposed around the inner shell in a spaced apart configuration and radially extend to the outer core. Each stator blade includes an inlet-side edge, an opposed outlet-side edge and opposed pressure-side and suction-side surfaces extending between the inlet-side and outlet-side edges. The pressure-side fluid directing projections outwardly project from the pressure-side surface in spaced relation to each other and each extend between the inlet-side and outlet-side edges. The fluid directing projections are configured to aid in redirecting torque converter fluid returning from a turbine and reducing fluid separation as the fluid interacts with the stator blades and associated fluid directing projections thereby increasing efficiency and performance of the torque converter.