CN-121989659-A - All-wheel drive vehicle

CN121989659ACN 121989659 ACN121989659 ACN 121989659ACN-121989659-A

Abstract

The present invention provides an all-wheel drive vehicle in which a transverse engine is arranged near a rear drive shaft, and a riding space in front of the engine in a forward-backward direction is easily ensured. The transverse engine is disposed near the rear drive shaft. The transmission that transmits power from the engine is disposed on a shaft center coaxial with an engine output shaft. The rear differential gear distributes power from the engine, transmitted via the transmission, to the rear drive shaft. 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 gear distributes power from the engine transmitted via the propeller shaft to the front drive shaft. The transfer case is disposed rearward in the forward-backward direction with respect to the engine.

Inventors

HOMAN AKINORI
SHIBAGAKI DAISUKE
Haraguchi Norihiro

Assignees

丰田自动车株式会社

Dates

Publication Date: 20260508
Application Date: 20251106
Priority Date: 20241108

Claims (4)

1. An all-wheel drive vehicle is provided with 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 axis of an engine output shaft in the vehicle width direction, a transmission that is disposed on an axis coaxial with the engine output shaft and transmits power from the engine, a rear differential gear that is disposed on an axis coaxial 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 gear that is disposed on an axis coaxial 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 driven, The transfer case includes a transfer case input member disposed rearward in a forward-reverse direction with respect to the engine and coupled to the transmission, and a transfer case output member disposed forward in the forward-reverse direction with respect to the transfer case input member and coupled to the transfer case input member and the propeller shaft, The engine and the transmission are disposed in a space through which the transfer case output member passes.
2. An all-wheel drive vehicle according to claim 1, characterized in that, The transfer case input part comprises a transfer case input shaft and a transfer case input gear fixedly arranged at one end part of the transfer case input shaft, The transfer case output part comprises a transfer case output shaft and a transfer case output gear, the other end part of the transfer case output shaft is connected with the transmission shaft and extends from one end part to the other end part towards the front in the forward and backward directions, the transfer case output gear is fixedly arranged at one end part of the transfer case output shaft and meshed with the transfer case input gear, The engine and the transmission are disposed in a space through which the transfer case output shaft passes.
3. An all-wheel drive vehicle according to claim 2, characterized in that, The other end portion of the transfer input shaft is coupled to the transmission via an input rotary member of the rear differential gear, and is disposed on an axis coaxial with the rear drive shaft and juxtaposed with the rear differential gear.
4. An all-wheel drive vehicle according to any one of claims 1 to 3, 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 in the vehicle width direction, a transmission that is disposed on an axis coaxial with the engine output shaft and transmits power from the engine, a rear differential gear that is disposed on an axis coaxial with the rear drive shafts and 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 gear that is disposed on an axis coaxial 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 center-mounted four-wheel drive transverse transmission described in patent document 1 is an example. Patent document 1 discloses that a rear differential gear 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 gear 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 space in front of the engine in the forward-reverse direction in a center-set layout in which the original space is 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 a transverse engine is disposed in the vicinity of a rear drive shaft, and a riding space in front of the engine in a forward-backward direction is easily secured. The gist of the invention of claim 1 resides in an all-wheel drive vehicle comprising (a) left and right front wheels, (b) left and right front drive shafts for driving each of the front wheels, (c) left and right rear drive shafts for driving each of the rear wheels, (c) a transverse engine disposed in the vicinity of the rear drive shafts and having an axis of an engine output shaft disposed in a vehicle width direction, a transmission disposed on an axis coaxial with the engine output shaft and transmitting power from the engine, a rear differential gear disposed on an axis coaxial with the rear drive shafts and distributing power from the engine via the transmission to each of the rear drive shafts, a transfer case for transmitting power from the engine via the transfer case to the front wheels, and a front differential gear disposed on an axis coaxial with the front drive shafts and having a power transmission from the engine via the transfer case to the transfer case and disposed on an axis coaxial with the front drive shafts, and a front transmission member disposed in a front transmission member and having a front transmission member disposed in a front transmission direction opposite to the transfer case and having a front transmission member, (c) a front transmission member disposed in the vehicle and having a front transmission member and a front transmission member disposed opposite to the transmission member. 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 on a shaft center coaxial with an engine output shaft. The rear differential gear 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 gear 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 configuration in which the transverse engine is disposed in the vicinity of the rear drive shaft, a riding space in front of the engine in the forward-backward direction is