A mechanical oil pump, an electric oil pump, and a strainer are disposed inside a transmission case. As a suction oil passage that returns an excess hydraulic pressure in a hydraulic control device to the mechanical oil pump, a common oil passage extending from the hydraulic control device, a branch point, a first oil passage extending from the branch point to the mechanical oil pump, and a second oil passage extending from the branch point to the electric oil pump are formed in the transmission case. A meeting point where an inlet oil passage for suctioning oil via the strainer and the first oil passage of the suction oil passage meet is formed inside a pump body of the mechanical oil pump. Accordingly, the suction oil passage of the mechanical oil pump and an inlet oil passage of the electric oil pump have a portion in common.

A vehicle electric drive apparatus is provided with a single hydraulic pump and left-side and right-side drive units. The left-side drive unit includes a left-side electric motor and a left-side transmission mechanism. The right-side drive unit includes a right-side electric motor and a right-side transmission mechanism. One of rotary shafts of the left-side transmission mechanism and one of rotary shafts of the right-side transmission mechanism constitute a pair of pump-drive rotary shafts. The single hydraulic pump is connected to the pair of pump-drive rotary shafts through respective one-way clutches, and is to be driven by one of the pump-drive rotary shafts that is rotated at a speed higher than the other of the pump-drive rotary shafts, so as to output a hydraulic pressure.

A traction transmission for purposes of transmitting the rotation of an input drive shaft to a rail wheel which is connected in a rotationally fixed manner to an output drive shaft, has at least two transmission stages, in each case having at least one small gear or pinion, and at least one large gear, and has a transmission housing with bearings for the input drive shaft and the output drive shaft, and has transmission oil arranged in the transmission housing, wherein in the position of use the input drive shaft is arranged below the output drive shaft. The transmission housing has an attachment element for purposes of a pivotable arrangement about an axis parallel to the axis of rotation of the input drive shaft and output drive shaft.

A coolant pump assembly having a combined hydraulic drive pump and a coolant circulating pump is disclosed herein, for use in connection with a utility vehicle, such as a ride-on or stand-on mower. Such a vehicle includes at least one combination pump assembly that utilizes a first fluid circuit to hydraulically drive a wheel of the vehicle and a second fluid circuit to cool one or more vehicle components.

Since an oil level of oil in a first space housing a transmission mechanism is lower than an oil level of the oil in a second space housing a differential gear, not only is it possible to lubricate a drive pinion and a ring gear housed in the second space with a sufficient amount of oil while cutting the total amount of oil compared with a case in which the oil levels of the first space and the second space are both high, but it is also possible to reduce the resistance of oil to stirring in the second space by discharging excess oil building up in the second space to the first space via a second oil passage formed along an axial center of a pinion shaft, and to prevent the oil level of the first space from decreasing excessively, thus avoiding aeration of an oil pump.

An electric drive unit and a drive axle system having an electric drive unit. The drive axle system also includes a drive shaft and an axle assembly that that is remotely positioned from the electric drive unit. The drive shaft operatively connects the electric drive unit to the axle assembly.

An electric drive unit and a drive axle system having an electric drive unit. The drive axle system also includes a drive shaft and an axle assembly that that is remotely positioned from the electric drive unit. The drive shaft operatively connects the electric drive unit to the axle assembly.

A transmission with an integrated hybrid drive is provided that includes a transmission housing as well as a torque converter rotatably mounted within the transmission housing. The torque converter includes an outer shell configured to be drivingly connected to a crankshaft. An e-motor is integrated into the transmission and includes a stator connected to the transmission housing, a rotor connected to the outer shell, and a controller. An auxiliary drive unit is provided having a drive shaft that is driven by a connection to the torque converter outer shell. A rotor position sensor (RPS) is provided on the drive shaft that is configured to signal rotor position data to the controller. The drive shaft and RPS are offset relative to the axis of the rotor and torque converter, providing better space utilization.

A hybrid vehicle includes: an oil passage including a common oil passage through which lubricating oil discharged from an oil pump flows, an engine lubricating oil passage extending from the common oil passage toward an engine internal space, and a transmission lubricating oil passage extending from the common oil passage toward a transmission internal space; and a variable throttle valve that can change a flow rate in the transmission lubricating oil passage. The variable throttle valve increases an opening degree of the variable throttle valve in a mode transition in which a first traveling mode in which the hybrid vehicle travels by driving power of an engine transitions to a second traveling mode in which the hybrid vehicle stops the engine and travels by the driving power of the electric motor.

A vehicle lubrication system for a hybrid electric vehicle which includes (i) an engine, (ii) drive wheels, (iii) a power transmission apparatus including an output portion and configured to transmit a power transmitted from the engine and (iv) a driving rotary machine connected to the output portion. The vehicle lubrication system includes (a) a mechanically driven pump connected to the output portion; (b) a fluid passage connected to an outlet of the pump, and configured to supply a lubricant to the driving rotary machine; (c) a relief valve connected to a relieving portion of the fluid passage, which is located between the outlet of the pump and the driving rotary machine in the fluid passage; and (d) an ON-OFF valve provided between the relieving portion and the driving rotary machine in the fluid passage, and configured to selectively allow and inhibit supply of the lubricant to the driving rotary machine.