Low-cost timely four-drive transfer case

Abstract

The invention provides a low-cost timely four-drive transfer case which mainly comprises a gear train, gear axles, an automatic clutch, a signal processor, gear axle rotation speed sensors and the like. The low-cost timely four-drive transfer case has the advantages that rotation speed difference signals are acquired by the two gear axle rotation speed sensors inside the transfer case and can be executed by the signal processor when rotation speed difference reaches a certain rotation speed difference definition value, combination and separation of the automatic clutch can be controlled, and accordingly two-wheel drive and four-wheel drive can be timely and automatically switched over; different control strategies can be set according to different vehicle types, so that frequent combination and separation of the automatic clutch can be prevented when the rotation speed difference fluctuates around a set critical point, the running capacity of integral vehicles can be improved, and the service life of the transfer case can be prolonged; the requirement on inconsistency of rotation speeds of front and rear wheel axles can be met by the transfer case without inter-axle differential mechanisms (in other words, the inter-axle differential mechanisms can be omitted), and sufficient power output and perfect drive mode selection can be automatically guaranteed for the vehicles under different road conditions.

Description

technical field [0001] The invention relates to a four-wheel drive control technology, in particular to a low-cost timely four-wheel drive splitter. Background technique [0002] The four-wheel drive system is a system used to provide driving force for the four wheels of the vehicle at the same time. Usually, the control system for switching from two-wheel drive to four-wheel drive is: [0003] One is: the conversion from two-wheel drive to four-wheel drive is carried out through manual control. When the vehicle is driving on muddy roads or sandy gravel subsidence roads and other harsh road conditions, the vehicle cannot drive normally, and the driving mode needs to be switched manually, resulting in cumbersome operations and uncontrollable Switch the best timing, resulting in insufficient or wasted power; and when climbing a slope or encountering ice slippery or wet slippery road conditions, resulting in excessive deviation of the front and rear wheel speeds, the car may sl...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the above-mentioned technical solutions, we now provide a solution aimed at solving the problem that the existing four-wheel drive system is cumbersome to operate and cannot grasp the best switching timing, which leads to excessive deviation of the speed of the front and rear wheels of the vehicle, resulting in the loss of control of the vehicle. Low-cost timely four-wheel drive transfer; in addition, the internal structure of ordinary timely four-wheel drive transfer is simplified and changed, reducing the manufacturing cost and use cost of timely four-wheel drive transfer

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