KR100261410B1 - Device for controlling damping force of clutch disc of a car - Google Patents

Abstract

PURPOSE: A damping force control device improves ride comfort and stability in driving. CONSTITUTION: A damping force control device comprises an rpm detecting sensor(1), an ECU(5), a switching controller(6) and a damping amount controller(9). The rpm detecting sensor(1) detects rpm of an engine. The ECU(5) decides damping amount by comparing calculated rotating acceleration with a fixed criteria. The switching controller(6) is controlled by the calculated value of the ECU(5). The damping amount controller(9) controls damping force by being operated by the switching controller(6) and also compressing a main damper(13). The damping force control device reduces effectively noise so as to improve ride comfort and stability in driving.

Description

Clutch disc deceleration control devices for automobiles

The present invention relates to a clutch disc damping force control apparatus for an automobile, and more particularly, to an automotive clutch disc damping force control apparatus capable of calculating a damping force most suitable for each state and actively controlling a damping force of the clutch, will be.

Generally, a vehicle is provided with a clutch between the engine and the transmission. Such clutches are mainly intended to transmit or shut off the rotational force of the engine to the transmission, and allow other smooth and vibrationless oscillations, It protects the engine and the power transmission from overload and functions to buffer the vibration caused by the rotation of the engine.

Such a clutch device is configured in various forms for effective power transmission and power shutdown, but basically comprises a clutch disk as a main element, and the clutch disk has the configuration as shown in FIG.

The clutch disc includes a spline hub 15 spline-coupled with a drive shaft, a disc substrate 12, a disc closing die 11 attached to both surfaces of the disc substrate 12 to generate a small friction, And a main damper 13 installed on the disk substrate for generating a main damping action.

The operating states of these clutches are as follows.

In the power steered state, the friction surface of the clutch pressure plate, the clutch disc, and the flywheel is pressed by the clutch pressure spring (not shown) so that the clutch disc rotates in combination with the flywheel integrated with the output shaft of the engine, To the transmission input shaft.

On the other hand, the power interruption occurs when the driver depresses the clutch pedal, and a release lever (not shown) interlocked with the clutch pedal pulls the clutch disc in a direction opposite to the pressure of the clutch pressure spring to open the gap between the flywheel, the clutch disc, So that the power of the engine is prevented from being transmitted to the transmission shaft.

Therefore, disc pacing is the main role in the transmission and blocking of power from the clutch discs. Disc disc closing is high in heat resistance, abrasion resistance, friction coefficient, and thermal conductivity, Use what can be maintained.

On the other hand, when the clutch is engaged, when the driving force of the engine is larger than the load due to the large frictional coefficient of the disk pacing, temporary vibration occurs in the vehicle and severe driving of the engine is stopped.

Such vibration varies depending on the degree of acceleration of the engine, and the larger the acceleration, the larger the vibration. In order to attenuate the torsional vibration of the drive system caused by such a phenomenon, as shown in FIG. 1, it is necessary to place a damper mainly composed of springs around the disk substrate and the hub of the clutch, to change the material of the friction material of the disk facing, Or changing the hysteresis stiffness.

However, there has been a limit in coping with a sudden change in the rotational torque of the engine with such a degree of apparatus.

Therefore, it is required to develop a new device capable of detecting a torque state of a changing engine and giving appropriate damping force to each state.

The present invention provides a clutch disc damping force control apparatus for an automobile which calculates a damping force most suitable for each state and actively controls the damping force of the clutch to increase the ride feeling of the vehicle as the engine rotation torque of the vehicle changes according to the above- To be a technical challenge.

1 is a schematic cross-sectional view of a conventional clutch disc;

FIG. 2 is a schematic view showing a clutch disk deceleration control apparatus for an automobile according to the present invention; FIG.

3 is a block diagram of an apparatus for controlling a clutch disc damping force for an automotive vehicle according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

1: engine rotational speed detecting sensor 2: engine rotational speed calculating section

3: engine rotation acceleration calculation unit 4: attenuation calculation unit

5: Electronic control unit 6: Switching control unit

7: Switching mechanism 8: Actuator

9: attenuation amount control means 11: disk facing

12: disk substrate 13: main damper

14: Pre-damper 15: Spline hub

16: hub plate

According to one aspect of the present invention, there is provided a clutch disc for a vehicle comprising a spline hub, a hub plate, a disc substrate mounted on the disc substrate, a free damper provided around the hub, and a main damper installed on the disc substrate. , Characterized in that it comprises at least one hydraulic cylinder or pneumatic cylinder integrally formed with a main damper as an attenuation amount control means and capable of changing the damping force.

The present invention also provides a vehicle comprising: a rotational speed detecting sensor (1) for detecting a rotational speed of an engine; an attenuation amount control means (9) which is a hydraulic cylinder or a pneumatic cylinder installed in the clutch; A switching control section (6) for controlling the operation of the actuator; a control section (6) for calculating the rotation acceleration of the engine based on the detection value of the rotation speed detection sensor, And an electronic control unit (5) for controlling the switching control unit by determining an amount of attenuation in comparison with the driving control system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0027] Hereinafter, the configuration and operation of a vibration reduction clutch disc for a vehicle driving system and a control apparatus therefor according to the present invention will be described.

FIG. 2 is a view showing a vibration reduction clutch disk for an automotive vehicle of the present invention and its control device, which is provided on the side of the flywheel F so as to detect the engine speed so as to adjust the amount of attenuation of the main damper installed on the clutch disk An electronic control unit 5 provided to calculate a rotation acceleration based on a signal from the engine rotation speed detection sensor 1 and a value computed from the electronic control unit 5 Such as a hydraulic cylinder or a pneumatic cylinder, which is provided to regulate the damping force by operating the actuator 8 to pressurize and depressurize the main damper, and an actuator 8 9) are installed.

The hydraulic cylinder or the pneumatic cylinder is configured to use only the hydraulic pressure or the pneumatic pressure or the hydraulic pressure and the pneumatic pressure at the same time and is installed on the disk substrate of the clutch disk and controls the flow rate or the amount of the pneumatic pressure in the cylinder, Thereby controlling the amount of attenuation.

The method may be either a method of directly supplying or releasing air pressure or hydraulic pressure into a conventional cylinder, or a means of indirectly controlling the pressure by using the rotation of the built-in motor.

However, in order to supply the hydraulic pressure to the hydraulic cylinder, the spline hub 15, which is the center of the rotation axis, may be used. And then supplying the gas to the cylinder.

The number of cylinders is not limited, and if more than one is used, a radial installation is preferred.

The control method and process of the apparatus will be described with reference to FIG.

The degree to which the driving force of the engine of the vehicle changes can be obtained by using the rotational speed of the engine. To obtain the rotational speed of the engine, calculate the number of revolutions per minute of the engine. The engine rotational speed detecting sensor 1 measures the rotational speed of the flywheel F with a mechanism for detecting the rotational speed of the engine.

The detection result is immediately transmitted to the electronic control unit. The electronic control unit 5 includes an engine rotation speed calculation unit 2 for calculating the rotation speed from the revolution speed per minute of the engine, an acceleration calculation unit 3 configured to center the differentiator to calculate the rotation acceleration of the engine from the rotation speed of the engine, And an attenuation amount computing unit 4 for computing an appropriate attenuation control amount by comparing a preset value and a current acceleration value in advance and transmitting the current attenuation amount to the switching control unit 6 according to the result.

The switching control section 7 calculates the switching control amount and controls the switching action of the switching mechanism 7 in accordance with the target.

The electronic control unit, the switching control unit, and the switching mechanism may be physically integrated.

The actuator 8 is operated by the switching operation of the switching mechanism to control the pneumatic or hydraulic pressure in the attenuation amount control means 9 to control the attenuation amount.

For example, when the acceleration is very large, a method of reducing the impact by increasing the amount of attenuation is used.

Since the relationship between the acceleration and the attenuation amount is previously input to the electronic control unit 5 so that the attenuation amount is changed according to the current engine acceleration, an appropriate attenuation amount corresponding to the current acceleration state is calculated and actively The attenuation amount can be controlled.

The amount of attenuation according to the acceleration depends on the engine driving force of the vehicle, the weight of the vehicle body, and the material and shape of the clutch.

Whether the target of control is hydraulic or pneumatic depends on the basic control means of the vehicle. Since both of these are used and the hydraulic pressure can be controlled by the built-in drive motor or electromagnet, it is not specified , It is possible to apply the hydraulic control method which is relatively widely used.

It is possible to improve the ride comfort of the vehicle and improve the safety of the vehicle operation by effectively reducing the noise state in the drive system of the vehicle by providing the above-described clutch disc damping force control apparatus for an automobile of the present invention.

Claims (2)

A clutch disc damping force control device for an automotive vehicle, comprising a main damper installed on a clutch disc and configured to buffer an impact when the rotational acceleration of the engine is varied, comprising: a rotational speed detecting sensor provided to detect the rotational speed of the engine; An electronic control unit that receives a signal from the speed detection sensor and calculates an acceleration of rotation of the engine and compares the value with a predetermined comparison reference to determine an attenuation amount; a switching control unit controlled by a value calculated from the electronic control unit; And an attenuation amount control unit that is operated by the switching control unit and controls the damping force by pressing the main damper. The apparatus according to claim 1, wherein the attenuation amount control means is a hydraulic cylinder, and the actuator is a control valve installed to control a hydraulic pressure applied to the hydraulic cylinder.