Four-wheel drive vehicle control system and method

A four-wheel-drive, wheel-drive technology, applied in the direction of road vehicle drive control systems, control devices, vehicle components, etc., can solve the problems of increased friction loss and fuel consumption, and achieve the goal of reducing fuel consumption and reducing frictional resistance loss Effect

Active Publication Date: 2018-10-23
沃恩自动化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, in instances where the disconnect device does not disengage when the transfer case is shifted to 4x2 mode, the rotating driveline

Method used

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Examples

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Example Embodiment

[0026] The following detailed description relates to systems and methods for switching between a two-wheel drive mode and a four-wheel drive mode in a road vehicle. figure 1 An exemplary embodiment of a vehicle power system is shown in, including an engine, a transmission, various axles and axles, and wheels for providing power to the vehicle. The vehicle power system can be controlled by the power system control system, figure 2 An example of this is shown in. Specifically, the power system control system may adjust the operation of one or more of the transfer case and the secondary power transmission system disconnect device to switch between the four-wheel drive mode and the two-wheel drive mode, such as image 3 As described in the example method. In some examples, such as Figure 4 In the exemplary method shown, the transition between the four-wheel drive mode and the two-wheel drive mode can be commanded by the vehicle operator. However, in other examples, such as Figure 5

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PUM

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Abstract

A method and a system are provided for operating a four-wheel drive powertrain of a vehicle. In one example, a method may comprise the steps of responding to a desired shift from a four- wheel drive mode to a two wheel-drive mode; decreasing a transfer case torque output to a secondary driveline to a lower first level and disengaging a disconnect device of the secondary driveline; increasing the transfer case torque output from the lower first level to a higher second level over a duration; after the duration, reducing the transfer case torque.

Description

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Claims

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Application Information

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Owner 沃恩自动化有限责任公司
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