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Torque distribution control method for a four-wheel drive motor vehicle and corresponding vehicle

A torque distribution, motor vehicle technology, applied in the direction of control devices, vehicle components, transportation and packaging, etc., can solve problems such as not provided, and achieve the effect of avoiding the danger of overheating

Active Publication Date: 2013-03-06
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] These systems use torque distribution control to reduce slip but provide nothing to effectively protect the coupling in the event of persistent slip

Method used

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  • Torque distribution control method for a four-wheel drive motor vehicle and corresponding vehicle
  • Torque distribution control method for a four-wheel drive motor vehicle and corresponding vehicle
  • Torque distribution control method for a four-wheel drive motor vehicle and corresponding vehicle

Examples

Experimental program
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Effect test

Embodiment Construction

[0038] figure 1 The main components of a four-wheel drive motor vehicle Ve are schematically shown with permanent engine torque transmission to the front axle 2FT. This type of vehicle is selected as an example. The engine of the vehicle may be an internal combustion engine 3 , an electric motor or a hybrid combination. The persistent transmission of engine torque can be applied equally to the rear axle 2RR.

[0039] The vehicle includes four wheels 1a, 1b, 1c, 1d mounted on a front axle 2FT and a rear axle 2RR, respectively. The vehicle also includes a steering wheel 4 connected to a steering column 5 . The vehicle also includes a gearbox 6 that transmits torque from the engine 2 to a front axle 2FT and a front transfer case 7 . A transfer shaft 8 driven by this transfer case 7 is connected to a rear axle transfer case 10 through a coupling 9 in order to transmit torque from the transmission case 6 to the rear axle 2RR.

[0040] The vehicle also comprises a computer 11 a...

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PUM

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Abstract

The invention relates to a motor vehicle (Ve) with four drive wheels (1a, 1b, 1c, 1d) mounted on two axles (2AV, 2AR), comprising: a transfer shaft (8) connected to the first axle and a controlled coupling (9) which can transfer part of the torque from the transfer shaft (8) to the second axle, means for determining the respective speeds of the two axles, and a torque distribution control system (11) capable of determining a slip value representative of the speed difference between the two axles and of controlling the coupling. The torque distribution control system is configured to control the coupling (9) such as to suppress any torque transfer via the coupling when the average slip value over a pre-determined period (MinTime) exceeds a threshold.

Description

technical field [0001] The present invention generally relates to four-wheel drive vehicles equipped with a system for controlling the distribution of engine torque between a first shaft and a second shaft and additionally capable of controlling a coupling mounted between the two shafts . Background technique [0002] In these vehicles, the engine torque is divided between a first shaft and a second shaft, and the sum of the torque transmitted to these two shafts is equal to the engine input torque. The first shaft is linked to a transfer case shaft, and the second shaft is joined to the transfer case shaft through the coupling. Only the first shaft permanently receives the torque, the second more or less engages the coupling controlled by the distribution control system. The level of torque delivered to each axle can thus be adjusted by the control system as, for example, the operating mode of the vehicle changes. [0003] In the first operating mode, engine torque is fu...

Claims

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Application Information

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IPC IPC(8): B60K23/08B60W30/186
CPCB60W2510/0291B60K17/34B60W30/186B60K23/0808B60W2520/263
Inventor S·盖冈R·波廷N·罗马尼
Owner RENAULT SA
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