CN-121989658-A - All-wheel drive vehicle

CN121989658ACN 121989658 ACN121989658 ACN 121989658ACN-121989658-A

Abstract

The invention provides an all-wheel drive vehicle which is easy to ensure a living space in front of an engine in a forward and backward direction in a structure in which a transverse engine is arranged near a rear drive shaft. The transverse engine is disposed near the rear drive shaft. The transmission that transmits power from the engine is disposed coaxially with the engine output shaft. The rear differential distributes power from the engine, transmitted via the transmission, to the rear drive axles. The transfer case distributes power from the engine transmitted via the transmission to the front wheels. The propeller shaft transmits power from the engine, which is transmitted via the transfer case, to the front drive shaft. The front differential distributes power from the engine, transmitted via the propeller shaft, to the front drive axle. The transfer case is disposed rearward in the forward-backward direction with respect to the engine.

Inventors

HOMAN AKINORI
SHIBAGAKI DAISUKE
Haraguchi Norihiro
Sado kogaku

Assignees

丰田自动车株式会社

Dates

Publication Date: 20260508
Application Date: 20251105
Priority Date: 20241108

Claims (5)

1. An all-wheel drive vehicle comprising left and right front wheels, left and right front drive shafts that drive each of the front wheels, left and right rear drive shafts that drive each of the rear wheels, a transverse engine that is disposed in the vicinity of the rear drive shafts and has an engine output shaft that is in the vehicle width direction, a transmission that is disposed coaxially with the engine output shaft and transmits power from the engine, a rear differential that is disposed coaxially with the rear drive shafts and distributes power from the engine transmitted via the transmission to each of the rear drive shafts, a transfer that distributes power from the engine transmitted via the transmission to the front wheels, a propeller shaft that transmits power from the engine transmitted via the transfer to the front drive shafts, and a front differential that is disposed coaxially with the front drive shafts and distributes power from the engine transmitted via the propeller shaft to each of the front drive shafts, characterized in that the all-wheel drive vehicle is configured such that, The transfer case is disposed rearward in the forward-backward direction with respect to the engine.
2. An all-wheel drive vehicle according to claim 1, characterized in that, The transfer case includes a transfer case input member including a transfer case input shaft and a transfer case input gear fixedly provided at one end portion of the transfer case input shaft, and a transfer case output member coupled to the transfer case input member, The other end portion of the transfer input shaft is coupled to the transmission via an input rotary member of a rear differential, and is disposed in parallel with the rear differential on a center axis with the rear drive shaft.
3. An all-wheel drive vehicle according to claim 2, characterized in that, The transfer case output member includes a1 st transfer case output shaft extending from one end portion to the other end portion toward the rear in the forward-backward direction, a transfer case output gear fixedly provided at one end portion of the 1 st transfer case output shaft and meshed with the transfer case input gear, a 2 nd transfer case output shaft disposed in parallel with the 1 st transfer case output shaft and having one end portion coupled to the transmission shaft, and a coupling member coupling the other end portion of the 1 st transfer case output shaft and the other end portion of the 2 nd transfer case output shaft.
4. An all-wheel drive vehicle according to claim 3, characterized in that, The connecting component comprises a1 st gear fixedly arranged at the other end part of the 1 st transfer case output shaft, a2 nd gear fixedly arranged at the other end part of the 2 nd transfer case output shaft, and a transmission component wound on the 1 st gear and the 2 nd gear.
5. An all-wheel drive vehicle according to any one of claims 1 to 4, characterized in that, The engine is disposed forward in the forward-backward direction with respect to the rear drive shaft.

Description

All-wheel drive vehicle Technical Field The present invention relates to an all-wheel drive vehicle in which an engine is disposed rearward. Background An all-wheel drive vehicle is known that includes left and right front wheels, left and right front drive shafts that drive each of the front wheels, left and right rear drive shafts that drive each of the rear wheels, a transverse engine that is disposed in the vicinity of the rear drive shafts and has an engine output shaft that is centered in the vehicle width direction, a transmission that is disposed coaxially with the engine output shaft and transmits power from the engine, a rear differential that is disposed coaxially with the rear drive shafts and distributes power from the engine transmitted via the transmission to each of the rear drive shafts, a transfer that distributes power from the engine transmitted via the transmission to the front wheels, a propeller shaft that transmits power from the engine transmitted via the transfer to the front drive shafts, and a front differential that is disposed coaxially with the front drive shafts and distributes power from the engine transmitted via the propeller shaft to each of the front drive shafts, for example, the transverse transmission described as a four-wheel drive in patent literature. Patent document 1 discloses that a rear differential is provided rearward from a main shaft of a transmission, a transfer case is provided forward, and an output shaft of the transfer case is led forward and coupled to the front differential via a propeller shaft. Patent document 1 Japanese patent laid-open No. 5-58178 Disclosure of Invention In the all-wheel-drive vehicle described in patent document 1, since the transfer case is disposed in front of the transmission in the forward-reverse direction, that is, in front of the engine, it is difficult to secure a living space in front of the engine in the forward-reverse direction in a center-mounted layout in which the living space is originally small. The present invention has been made in view of the above circumstances, and an object thereof is to provide an all-wheel-drive vehicle in which, in a mode in which a transverse engine is disposed in the vicinity of a rear drive shaft, a living space in front of the engine in the forward-backward direction is easily secured. The object of the invention 1 is to provide an all-wheel drive vehicle (a) including left and right front wheels, left and right front drive shafts that drive each of the front wheels, left and right rear drive shafts that drive each of the rear wheels, a transverse engine that is disposed in the vicinity of the rear drive shafts and that has an axial center of an engine output shaft in a vehicle width direction, a transmission that is disposed coaxially with the engine output shaft and that transmits power from the engine, a rear differential that is disposed coaxially with the rear drive shafts and that distributes power from the engine transmitted via the transmission to each of the rear drive shafts, a transfer case that distributes power from the engine transmitted via the transmission to the front wheels, a propeller shaft that transmits power from the engine transmitted via the transfer case to the front drive shafts, and a front differential that is disposed coaxially with the front drive shafts and that distributes power from the engine transmitted via the propeller shaft to each of the front drive shafts, and (b) a reverse direction relative to each of the front drive shafts. Effects of the invention According to the invention described in claim 1, the transverse engine in which the axial center of the engine output shaft is in the vehicle width direction is disposed in the vicinity of the rear drive shaft. The transmission that transmits power from the engine is disposed coaxially with the engine output shaft. The rear differential distributes power from the engine, transmitted via the transmission, to each of the rear drive axles. The transfer case distributes power from the engine transmitted via the transmission to the front wheels. The propeller shaft transmits power from the engine, which is transmitted via the transfer case, to the front drive shaft. The front differential distributes power from the engine transmitted via the propeller shaft to each of the front drive axles. The transfer case is disposed rearward in the forward-backward direction with respect to the engine. Therefore, in an all-wheel drive vehicle having a structure in which a transverse engine is disposed in the vicinity of a rear drive shaft, a living space in front of the engine in the forward/backward direction is easily ensured. Drawings Fig. 1 is a diagram illustrating a schematic configuration of a vehicle to which the present invention is applied. Fig. 2 is a partial cross-sectional view of the transfer case when the input-side member or the vicinity thereof is viewed from above in the vertical direction in th