CS205990B1 - Rear part of themotor vehicle - Google Patents

Description

It is an object of the present invention to provide a rear end of a motor vehicle, particularly suitable for vehicles with a driven rear axle, where it is difficult to select a safe and convenient fuel tank position.

Rear-end configurations of motor vehicles are known in which the fuel tank is either below the trunk floor behind the rear axle or in front of the rear axle at a point below the rear seats, or above the level of the trunk floor either on the side or behind the rear seat support.

These known fuel tank locations have some disadvantages. For example, a tank located behind the rear axle or axle under the floor of the luggage compartment is very vulnerable to a rear or side impact on the vehicle and thus dangerous to the fire of the vehicle, especially in vehicles with short rear overhangs. This position of the fuel tank also adversely affects the distribution of axle masses. The tank in front of the rear axle at the point below the rear seats is difficult to manufacture and install, has a complicated connection to the filler neck, is more difficult to vent and exit near the exhaust pipe. The tanks located above the floor of the luggage compartment are either in a special compartment, most often behind the rear seat backrests, or are in the luggage compartment - and must be separated from the luggage compartment by a solid and sealed wall. These tank locations considerably reduce the volume of the luggage compartment, increase the center of gravity of the car and generally do not allow unification with the wagons in the estate version.

These disadvantages are overcome by the rear configuration of the motor vehicle according to the invention in that the fuel tank extends at least by one third into the space between the transaxle and the floor of the luggage compartment, the lower bottom of the tank being protected by a rear support bar. The front part of the bottom is provided with an embossment for the axle and in the rear part an embossment for the spare wheel. By its shape, the fuel tank partially surrounds the transmission housing and, when viewed from the side, the fuel tank is positioned so that its entire length, or at least a greater part of its length, is in alignment with the wheels and thus outside the deformation zone of the body. The spare wheel buckles between the axle and the floor when the rear of the vehicle deforms, protecting the fuel tank from a rear impact. The fuel tank protects the wheels and rear axle suspension from side impact, while the fuel tank is protected from below by the axle, partly by the spare wheel and the rear crossmember to which the axle is attached. This arrangement is beneficial in terms of axle load distribution, does not increase the center of gravity position and the fuel tank can be easily vented and connected to the filler neck. The fuel tank, by its mass and location, is an obstacle to the transmission of noise from the axle.

An exemplary embodiment of a rear part of a motor vehicle according to the design is shown in the attached drawing, wherein Fig. 1 is a front view and Fig. 2 is a plan view of the rear of the vehicle.

The drive rear axle 1 is mounted at the front to the rear crossmember 2 and with it via the spring blades 3 to the body. 4. Between the axle 1 and the luggage compartment floor 5, there is a fuel tank 6 such that all or at least a greater part of its length is in alignment with the rear wheels 7. The lower half of the fuel tank 6 is selected above the axle 1, that it partially surrounds it. The fuel tank 6 is crimped at the rear to accommodate the spare wheel 8. The fuel tank 6 is suitably secured to the bodywork 4. The rear part of the axle 1 must be attached to the bodywork 4 via the flexible seats so that the fastening element extends beyond the space defined by the fuel tank 6 and did not aggravate its removal from the car. FIG. 2 shows one of the possible ways of attaching the rear portion of the transaxle 1 to the longitudinal members 9 of the bodywork 4 by means of a support bar 10 extending below the fuel tank 6. The resilient bed (not shown) may be between the rear part of the transaxle 1 and the bar 10; or between the crossbar 10 and the side members 9, or both. If the rear support bar 10 is rigidly connected to the longitudinal members 9 of the bodywork 4 or even another fixed part of the bodywork 4, this bar 10 can advantageously be used to hold the fuel tank 6 or the spare wheel suspension device 8 (not shown). In order that the volume of the fuel tank 6 that falls off due to the recess of the lower half of the fuel tank 6 above the transaxle 1 is as small as possible, the axle of the transaxle 11 is moved forward of the rear axle 12 (see FIG. 2) so that the drive shafts 13 point forward.

This arrangement of the rear part of motor vehicles is particularly advantageous in terms of the safe location of the fuel tank in all possible crashes of the vehicle in the event of a crash and can be applied to all types of passenger and commercial vehicles, in particular vehicles with powered rear axle and independently suspended rear wheels; with a short rear overhang and for estate vehicles.

Claims (3)

SUBJECT A rear part of a powered rear axle motor vehicle with a fuel tank located between the rear wheels, characterized in that the fuel tank (6) extends at least by one third into the space between the axle (1) and the floor (5) of the trunk. 2. The rear part of a motor vehicle as claimed in claim 1, characterized in that the rear crossmember (10). The invention is located below the lower bottom of the fuel tank (6). Motor vehicle rear part according to one of Claims 1 and 2, characterized in that the fuel tank (6) is provided in the front part of the bottom with an embossment for the axle (1) and in the rear part an embossment for the spare wheel (8).