CS271735B1 - Device of differential's closure control - Google Patents

Abstract

The device for differential lock control, mainly in motor-driven vehicles ensures the well timed engaging and disengaging of the differential lock without the driver's intervention. Its principle consists in the fact that outputs from left wheel speed sensor (1) and right wheel speed sensor (2) are connected to the inputs of the comparator (3), whose outputs from the manual control element (5) of the differential lock (8) are connected to time switch (4) inputs. The time switch (4) output is connected with a power element (6) input, to whose output differential lock (8) control element (7) is connected. The control element (7) is mechanically linked with a differential lock (8). The device can be used also for mobile working machines.<IMAGE>

Description

(54)

Device for controlling the differential lock ⁰ '' device for controlling the differential lock, especially for motor of the vehicle, providing timely on and off the differential lock without the driver's intervention. It is based on the fact that the outputs of the rotational wheel sensor (1) and the right wheel speed sensor (2) are connected to the inputs of a comparator (3) whose output from the manual control element (5) of the differential lock (8) is connected. to the inputs of the timer (4), the output of which is connected to the input of a power member (6), to the output of which the actuator (7) of the differential lock (8) mechanically coupled to the differential lock (8) is connected. The device can also be used for mobile work machines.

271 735 (11) (13) bl (51) Int. CI. ⁵ G05D 13/64

OS 271 735 8)

CS 271 735 Bl

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for operating a differential lock for automatic switching on and off of a differential lock, particularly for motor vehicles.

Increase of the terrain passability of vehicles is ensured especially in off-road vehicles by differential lock, which is controlled by the driver. The optimum on / off time of the differential lock is not assured when subjecting the driver to a subjective driving situation. This disadvantage of manual operation is serious because of the on-road throughput, timely engagement is crucial, and due to the minimization of tire and drivetrain wear, the differential lock is disengaged in time.

The disadvantages of such a control are eliminated by the differential lock control device according to the invention, in which the outputs from the left-wheel speed sensor and the right-wheel speed sensor are connected to the inputs of a comparator whose output together with the output of the manual differential lock actuator are connected to the inputs of a timer, the output of which is connected to the input of a power member to which the output of the differential lock actuator is coupled mechanically coupled to the differential lock.

The new effect of the device in question is to switch the differential lock on and off in a timely manner, which is not dependent on the driver's decision. However, the concept also allows manual control by the driver.

The attached drawing shows a block diagram of a differential lock control device.

In the particular embodiment of the figure, the left wheel speed sensor 3 and the right wheel speed sensor 2 are realized using the capacitive sensing principle. Their outputs are electrically connected to the inputs of the electronic comparator J. The output from the electronic comparator 2 and the output from the manual control 2 of the differential lock 8, which is a pushbutton switch on the instrument panel, are electrically connected to the inputs of the electronic timer 4. an input of an electromagnetic relay implementing a power member 6, the output of which is a tram connection to the input of the differential lock 8, which in a particular embodiment is an electro-pneumatic differential lock 8, mechanically coupled to the differential lock 8.

The function of the device according to the invention is as follows: when the vehicle travels off-road with unequal adhesion ratios on the drive wheels, the comparator 2 transmits a pulse to the timer 4 by comparing the signals from the right wheel speed sensor 31 and the right wheel speed sensor 2. by means of the power member 6, it engages the actuator 2 of the differential lock 8, which mechanically operates the differential lock 8. Switching on the differential lock 8 can be carried out by the driver at any time via the manual control 2 of the differential lock 8. The differential lock 8 is switched off by the timer 4 after the set time interval has elapsed. The realization of individual parts of the device can be based on electric, pneumatic, hydraulic or mechanical principle or their combination.

The differential lock control device according to the invention can be used, in particular, for off-road vehicles as well as for working mobile machines, where the control and travel of the machine is not a priority for the operator.

Claims (2)

OBJECT OF THE INVENTION Differential lock control device, in particular for motor vehicles, consisting of wheel speed sensors, a comparator, a timer, a manual control2 CS 271 735 B1 differential lock actuator, power member, differential lock actuator and differential lock, characterized in that the outputs from the left wheel speed sensor (1) and the right wheel speed sensor (2) are connected to comparator inputs (3) whose output and output from the manual actuator (5) of the differential lock (8) are connected to the inputs of the timer (4), its output being connected to the input of the power member (6) to which the actuator (7) is connected a differential lock (8) mechanically coupled to the differential lock (8).