Control device for four-wheel drive vehicle

一种四轮驱动、控制装置的技术，应用在控制装置、机动车、混合动力车辆等方向，能够解决驱动损失增大、发动机耗油量变大等问题，达到抑制异音、抑制耗油量变大的效果

Inactive Publication Date: 2016-08-03
MAZDA MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case where the torque distribution is simply controlled regardless of the change in the fluctuating torque, the driving loss due to the torque distribution to the rear wheels increases, and the fuel consumption of the engine increases.

Method used

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  • Control device for four-wheel drive vehicle
  • Control device for four-wheel drive vehicle
  • Control device for four-wheel drive vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0035] figure 1 It is a schematic configuration diagram showing a four-wheel drive vehicle 10 to which the control device according to the present invention is applied. The four-wheel drive vehicle 10 has: an engine 14; a transmission 16 that decelerates the output torque of the engine 14 at a predetermined reduction ratio; and transmits the output torque decelerated by the transmission 16 to left and right front wheels 12F (main drive wheels) ) differential device 20 for the front wheels; a transfer case 22 that takes out the output torque transmitted to the left and right rear wheels 12R (auxiliary drive wheels) from the differential device 20 for the front wheels; and transfers the output torque from the transfer case 22 The moment is transmitted to the rear wheel differential device 26 of the left and right rear wheels 12R via the axle shaft 24 .

[0036] The engine 14 is a multi-cylinder engine having a plurality of cylinders, for example, an in-line four-cylinder engine...

no. 2 approach

[0113] refer to figure 1 , although description is omitted in the first embodiment, the four-wheel drive vehicle 10 includes a drive motor 15 that assists the engine 14 with torque. In the first embodiment, as an example in which the control device 34 (abnormal noise reduction unit) adjusts the torque distribution to the rear wheels 12R according to the magnitude of the fluctuating torque of the engine 14, a response to the spark ignition mode and the compression automatic An example of a change in fluctuating torque during a mode change between ignition modes. In this second embodiment, an example is given in which the control device 34 responds to changes in fluctuating torque to the extent that the torque assist by the drive motor 15 is accompanied.

[0114] Such as figure 1 As shown, a drive pulley 151 is attached to the output shaft of the drive motor 15 , and a crank pulley 142 is attached to the crankshaft 141 of the engine 14 . A winding transmission member 17 is wo...

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PUM

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Abstract

The invention provides a control device controlling a four-wheel drive vehicle which includes an engine, a torque transmission mechanism which transmits an output torque of the engine to main drive wheels and to auxiliary drive wheels, and a torque distribution adjustment mechanism provided in the torque transmission mechanism and configured to adjust torque distribution with respect to the auxiliary drive wheels. The control device is provided with an abnormal noise reduction unit which controls the torque distribution adjustment mechanism to adjust torque distribution with respect to the auxiliary drive wheels in such a manner as to suppress abnormal noise generation when the engine is operated in an abnormal noise generation range in which the torque transmission mechanism is in an abnormal noise generation state. The abnormal noise reduction unit adjusts the torque distribution with respect to the auxiliary drive wheels in accordance with a magnitude of torque fluctuation of the engine. Therefore the abnormal noise generation in a torque transmission mechanism is suppressed while deterioration of fuel economy is suppressed.

Description

technical field [0001] The present invention relates to a control device for a four-wheel drive vehicle that distributes the output torque of an engine to main drive wheels and auxiliary drive wheels. Background technique [0002] As a four-wheel-drive vehicle, there is a four-wheel-drive vehicle in which a power unit mounted on a front portion of a vehicle body includes a transfer case (power transfer) for driving rear wheels. The power unit includes an engine, a transmission, and a differential device for front wheels, and drives left and right front wheels as main drive wheels. A propeller shaft extending in the front-rear direction of the vehicle body is connected to the transfer case. A differential device for rear wheels is arranged at a rear end portion of the propeller shaft, and transmits power to left and right rear wheels serving as auxiliary drive wheels. [0003] A coupling (coupling unit) such as an electromagnetic type or the like with variable transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/348
CPCB60K17/348B60K23/0808B60K2023/0833B60K2023/0858B60W10/06B60W10/08B60W10/119B60W30/20B60W2030/206B60W2510/083B60W2710/06B60W2720/40B60Y2306/09B60W20/17Y02T10/62
Inventor 丸谷哲史西川启
Owner MAZDA MOTOR CORP
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