Abstract: A driving system for a vehicle includes a drive source, a driven portion, a wet multiple disc connection/disconnection unit provided on a power transmission path between the drive source and the driven portion, and a connection/disconnection unit controller configured to control a release and an application of the connection/disconnection unit, wherein the driving system further includes a time counter configured to obtain a continuous applied time that is an elapsed time from a start of a latest application of the connection/disconnection unit.

Abstract: A driving system for a vehicle includes a drive source, a driven portion, a wet multiple disc connection/disconnection unit provided on a power transmission path between the drive source and the driven portion, and a connection/disconnection unit controller configured to control a release and an application of the connection/disconnection unit, wherein the driving system further includes a time counter configured to obtain a continuous applied time that is an elapsed time from a start of a latest application of the connection/disconnection unit.

Abstract: A hybrid vehicle includes an internal combustion engine, an exhaust passageway, and a driving system having a first and a second motors and a housing which houses the first and the second motors. The driving system is disposed further rearwards than the internal combustion engine in a front-rear direction of the vehicle. The exhaust passageway extends from the internal combustion engine towards a rear side of the vehicle and is disposed so as to surround: a first plane passing through a front end of the housing and perpendicular to the front-rear direction; a second plane passing through a rear end of the housing and perpendicular to the front-rear direction; a third plane passing through a left end of the housing and perpendicular to a left-right direction; and a fourth plane passing through a right end of the housing and perpendicular to the left-right direction.

Abstract: Two motor and planetary gear type speed reducers are disposed sequentially from an outer side in a width direction of a vehicle, whereby the speed reducers are disposed between the motors. A radially outer edge of a ring gear of one of the speed reducers is formed smaller than the smaller one of the two radially outermost edge portions of the motors. An offset space that is recessed further radially than an imaginary line that connects the radially outermost edge portion of one motor with the that of the other motor is provided radially outwards of the ring gear of one of the speed reducers, and at least part of a breather chamber of a breather unit and at least part of a strainer accommodation compartment are disposed within the offset space. It is thus possible to expand a volumetric capacity room that communicates with an interior of a case.

Abstract: In a hybrid vehicle 3, a rear wheel driving system 1 is disposed further rearwards than an internal combustion engine 4 in a front-rear direction of the vehicle 3, and an exhaust passageway 80 extends from the internal combustion engine 4 towards the rear side of the vehicle 3 and is disposed so as to surround a first plane S1 which passes through a front end of a case 11 and which is perpendicular to the front-rear direction of the vehicle 3, a second plane S2 which passes through a rear end of the case 11 and which is perpendicular to the front-rear direction of the vehicle 3, a third plane S3 which passes through a left end of the case 11 and which is perpendicular to a left-right direction of the vehicle 3, and a fourth plane S4 which passes through a right end of the case 11 and which is perpendicular to the left-right direction of the vehicle 3.

Abstract: A rear wheel driving apparatus (1) includes: a first right-left communication passage (FP) through which a left reservoir (RL) and a right reservoir (RR) are communicated with each other; and a second right-left communication passage (SP) which is provided in parallel with the first right-left communication passage (FP) and through which the left reservoir (RL) and the right reservoir (RR) are communicated with each other. Thus, flowability of a liquid fluid stored in a case (11) is enhanced, and smoothing of a fluid level is enabled.

Abstract: Pressures of left and right clutch pistons (55, 63) applied to left and right disk portions (42b, 42d) of a common clutch outer (42) of left and right clutches (29, 30) distributing drive force of an input shaft (20) to left and right output shafts (23, 24) are, finally, transmitted to and supported by a side housing (12) through a boss portion (42a) of the clutch outer (42) and a thrust bearing (53, 52, 48; 41, 27). Accordingly, the left and right clutches (29, 30) can be engaged with no problem. Even when the pressures of the clutch pistons (55, 63) deform the left and right disk portions (42b, 42d) of the clutch outer (42), the gap (?) formed therebetween prevents the transmission of the pressure of one of the clutches (29, 30) to the other clutch (29, 30). Accordingly, the interference between the operations of the left and right clutches (29, 30) is prevented.

Abstract: A rear wheel driving apparatus (1) includes: a first right-left communication passage (FP) through which a left reservoir (RL) and a right reservoir (RR) are communicated with each other; and a second right-left communication passage (SP) which is provided in parallel with the first right-left communication passage (FP) and through which the left reservoir (RL) and the right reservoir (RR) are communicated with each other. Thus, flowability of a liquid fluid stored in a case (11) is enhanced, and smoothing of a fluid level is enabled.

Abstract: Pressures of left and right clutch pistons (55, 63) applied to left and right disk portions (42b, 42d) of a common clutch outer (42) of left and right clutches (29, 30) distributing drive force of an input shaft (20) to left and right output shafts (23, 24) are, finally, transmitted to and supported by a side housing (7 2) through a boss portion (42a) of the clutch outer (42) and a thrust bearing (53, 52, 48; 41, 27). Accordingly, the left and right clutches (29, 30) can be engaged with no problem. Even when the pressures of the clutch pistons (55, 63) deform the left and right disk portions (42b, 42d) of the clutch outer (42), the gap (?) formed therebetween prevents the transmission of the pressure of one of the clutches (29, 30) to the other clutch (29, 30). Accordingly, the interference between the operations of the left and right clutches (29, 30) is prevented.

Abstract: Two motor and planetary gear type speed reducers are disposed sequentially from an outer side in a width direction of a vehicle, whereby the speed reducers are disposed between the motors. A radially outer edge of a ring gear of one of the speed reducers is formed smaller than the smaller one of the two radially outermost edge portions of the motors. An offset space that is recessed further radially than an imaginary line that connects the radially outermost edge portion of one motor with the that of the other motor is provided radially outwards of the ring gear of one of the speed reducers, and at least part of a breather chamber of a breather unit and at least part of a strainer accommodation compartment are disposed within the offset space. It is thus possible to expand a volumetric capacity room that communicates with an interior of a case.