KR20020028739A - Device for driving at a fixed speed - Google Patents

Abstract

PURPOSE: A device for driving a vehicle at a constant speed is provided to remove the malfunction by carrying out the system control not by a microcomputer but by a controller of a simple structure, thereby reducing the failure ratio and maximizing the reliability. CONSTITUTION: A device for driving a vehicle at a constant speed includes a cable drum(8) positioned at a rear part of a connection part(4) of an accelerator pedal(2) with a proper distance and connected to the connection part with a constant speed cable(6), an electronic clutch(10) for transmitting or blocking rotation force with respect to the cable drum, a motor(14) for transmitting decelerated rotation force to the electronic clutch, and a controller for controlling the electronic clutch and the motor with a constant speed driving switch, an acceleration/deceleration switch and a brake switch.

Description

Device for driving at a fixed speed {Device for driving at a fixed speed}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle constant speed driving apparatus capable of driving at constant speed without manipulating an accelerator pedal at a desired speed while driving.

The vehicle cruise control is a technology that has been applied to high-end cars for a long time in advanced countries since it can be conveniently used for a long time on a highway, and is controlled by a controller on a throttle arm connected to an accelerator pedal and a cable, as shown in FIGS. 6 and 7. The actuator is connected and installed to open and close the throttle valve in place of the accelerator pedal when setting.

However, based on the control diagram for controlling the system, a vehicle speed detection lead switch detecting a feedback signal of the vehicle speed, a microcomputer which receives the signal and sends an actuator control signal, and an actuator composed of a motor and a relay unit And various cancellation switches (brake switches, clutch switches, neutral switches, parking brake switches, etc.) for fail safe purposes, and automatic switches for inputting designated signals.

In addition, the setting can be made at a speed of about 40 km / h or more requiring a constant speed, and the driver's pressing of the set switch activates the self-holding circuit, and the reference throttle opening voltage corresponding to the vehicle speed at the moment the memory circuit presses the set switch. After setting this value, the optimum value of the throttle valve opening is determined by comparing the reference throttle opening voltage and the throttle opening voltage fed back from the potentiometer in the actuator, and then operating the speed increase control circuit or the deceleration control circuit. Move the actuator to adjust the throttle valve opening.

In addition, the motor's rotational movement is converted into oscillating motion and transmitted to the control arm of the actuator.The clutch is engaged only when the electronic clutch is installed and operating the cruise control.The rotational force of the motor is transmitted to the throttle valve. .

When releasing the steady speed set state or abnormality occurs for some time, the engagement of the electromagnetic clutch is released and the motor is configured to rotate the throttle valve in the totally closed direction.

Therefore, it requires expensive microcomputers and various sensors, and has a complicated configuration, which leads to a decrease in productivity and a competitive advantage due to an increase in the price of the vehicle. The malfunction rate of various components is very high as the malfunction and configuration of the microcomputer is complicated.

In addition, it is impossible to install it on the vehicle already shipped because it has to be applied in the design of the vehicle, and the operation switch is installed around the steering wheel, so it is very inconvenient to operate and it may cause trouble for safe operation. Done.

Also, in order to prevent accidents due to the malfunction of the automatic return switch, it is impossible to make constant speed driving at low speeds (about 40 km / h or less) .In particular, there are many road curves and congestion sections of vehicles as in Korea. Some inconveniences have been applied to luxury cars due to the inconvenience of having to reset, but it is rarely used in recent years.

Therefore, the present invention reduces the manufacturing cost and improves the reliability of the product through the simplification of the system configuration, and can be easily installed and used in a previously shipped vehicle, and all operations for the constant speed driving can be made while holding the steering wheel, and the constant speed at low speed It is an object of the present invention to provide a vehicle speed driving device capable of traveling and responding quickly and conveniently even in the case of frequent speed changes due to road curvature or congestion.

In order to achieve the above object, the present invention provides a constant speed cable wound on the cable drum by installing a cable drum having a return spring which is transmitted or blocked by the electromagnetic clutch at a reduced speed of the motor by the rear of the connector of the accelerator pedal. In this connection, the motor and the electromagnetic clutch are controlled by the controller connected to the constant speed traveling switch, the acceleration / deceleration switch and the brake switch of the handle.

In other words, if the constant speed drive switch is turned ON, the cable drum is connected to the shaft of the gear reduction unit by the operation of the electronic clutch, and the constant speed cable maintains the pull point of the acceleration cable. When the deceleration switch is operated, the cable drum rotates by the driving of the motor to pull or extend the constant speed cable, so that the speed can be adjusted even in the constant speed driving state.

In addition, when the speed is adjusted by the constant speed driving or acceleration / deceleration switch, when the constant speed driving switch is turned off or the brake is applied in an emergency, the system power is cut off by the operation of the brake switch, which causes the cable drum to rotate freely from the electromagnetic clutch. The accelerator pedal is initially homed.

At this time, the constant speed driving switch and the acceleration / deceleration switch included in the handle is preferably configured to have one main body, and it is preferable to install it near the grip part held by the hand of the door of the handle according to the position of the driver's seat for each country.

1 is a perspective view showing a state of use of the present invention

2: Main part front configuration diagram of the present invention

3 is a perspective view of an operation unit used in the present invention

4 is a side configuration diagram showing an operating state of a brake switch used in the present invention.

5 is a block diagram of the present invention

6 is a block diagram showing the operation relationship of the conventional invention

7 is a control block diagram of a conventional invention

<Explanation of symbols for main parts of the drawings>

(2)-accelerator pedal (4)-connection

(6)-Constant Cable (8)-Cable Drum

(10)-Electronic Clutch (12)-Reduction Gearbox

(14)-Motor (16)-Controller

(18)-Constant Speed Travel Switch (20)-Acceleration / Deceleration Switch

(22)-Brake Switch (24)-Bracket

(26)-Rotary Shaft (28)-Friction Plate

(30)-clutch plate (31)-acceleration cable

(32)-Return Spring (34)-Indicator

(36)-Control Panel (38)-Handle

(40)-Wire (42)-Bracket

(44)-Brake Pedal (46)-Operation

1 is a perspective view showing a state of use of the present invention, the present invention is a cable drum (8) connected to the connection portion 4 and the constant speed cable (6) of the accelerator pedal (2), the rotational force on the cable drum (8) The electronic clutch 10 for transmitting or blocking the electric clutch, the motor 14 connected to the electronic clutch 10 through the reduction gear box 12, the controller 16 for controlling such a system, and the controller It consists of the constant speed traveling switch 18 connected, the acceleration / deceleration switch 20, and the brake switch 22. As shown in FIG.

2 is a front sectional view of the main part of the present invention, in which the cable drum 8, the electromagnetic clutch 10, the gear box 12, and the motor 14 are sequentially installed on the bracket 24 fixed to the vehicle body. However, the cable drum (8) is to be located at the rear of the connection portion 4 of the accelerator pedal (2) with the operating distance of the pedal.

In the above, the cable drum 8 is rotatably installed from the rotating shaft 26 penetrating the inside thereof, and has a friction plate 28 on one side thereof so as to face the clutch plate 30 of the electromagnetic clutch 10, and the drum. The constant speed cable (6) wound around is connected to the connection portion (4) of the pedal together with the acceleration cable (31), and between the bracket (24) the constant spring return spring 32 of weak elasticity rather than the return force of the pedal Elastic installation in the winding direction of the cable (6) so that the cable has a proper tension at all times.

The electromagnetic clutch 10 installed at one side of the cable drum 8 has a general structure, and the clutch plate 30 faces the friction plate 28 of the cable drum 8, and the rotation shaft 26 is a reduction gearbox ( 12 is connected to the motor 14.

3 is a perspective view of the operation unit used in the present invention, the constant speed driving switch 18, the indicator light 34 indicating the operation of the switch, and the acceleration / deceleration switch 20 are installed in one body as much as possible. The operation unit 36 is configured, and the operation unit is preferably formed to be as small as possible and attached to the inner surface of the gripping portion which the thumb of the door touches when gripping the handle 38 for driving.

However, in the present invention, when the operation unit 36 is fixed to the handle 38, the wire for connection with the controller 16 should not interfere with the rotation of the handle. By using a variety of known means that can be made in the furnace contact to prevent the wire is loose or exposed to the outside, and to keep the wire taut by using a wire reel (39) having a take-up spring that is commonly seen in pre-production vehicles It is preferable to give, all of which are general technical configurations and specific technical configurations will be omitted.

FIG. 4 is a side view illustrating a brake switch used in the present invention, in which the brake switch 22 is attached to a bracket 42 fixed to a vehicle body, and the operating piece 46 of the brake pedal when the brake pedal 44 returns. ) So that the contact is switched when the pedal is pressed.

FIG. 5 is a block diagram of the present invention, in which an input of the controller 16 includes a constant speed traveling switch 18 for operating a system, an acceleration / deceleration switch 20 capable of arbitrarily adding or decreasing a traveling speed during constant speed driving, and a brake pedal. When stepping on (44), the contacts are switched to connect the brake switches 22 to cut off the power of the system, respectively, and to the output part the electromagnetic clutch 10 for transmitting or blocking the rotational force to the cable drum 8, The motor 14 which rotates forward and backward by the deceleration switch 20 and the indicator 34 which cooperate with the constant speed traveling switch 18 are comprised, respectively.

The present invention is connected to the connecting portion 4 in accordance with the movement of the accelerator pedal (2) because the cable drum (8) is free to rotate from the rotary shaft 26 in the OFF (OFF) state of the constant speed driving switch 18 during vehicle operation. The rotation of the throttle arm by the acceleration cable 31 opens and closes the throttle valve, whereby the speed is decreased.

However, the constant speed cable 6 is weaker than the self-return force of the accelerator pedal 2, but the return spring 32 having proper elasticity supports the cable drum 8 in the winding direction at all times and thus the movement of the accelerator pedal 2. Irrespective of the angle, the constant speed cable 6 is always kept in tension.

At this time, if the driver wants to drive in consideration of road conditions while driving, the controller 16 operates the electronic clutch 10 when the constant speed switch 18 is turned on when the desired speed is reached. When the clutch plate 30 is brought into contact with the friction plate 28 of the cable drum 8, the cable drum is not rotated by the reduction gear, so that the clutch plate 30 is switched to the constant speed driving state immediately.

In addition, if the accelerator pedal (2) is stepped down when rapid acceleration is required in the constant speed driving state, although the cable drum (8) is fixed, the operation of the pedal for acceleration is normally performed due to the length of the constant speed cable (6). If the foot is released from the pedal after rapid acceleration, the fixed cable drum returns to the initial constant speed driving state.

When the acceleration or deceleration switch 20 is manipulated to the desired direction, the motor 14 rotates in the corresponding direction when decelerating due to the acceleration or deceleration of the road rather than the temporary acceleration and acceleration. When the rotational force of the rotation of the cable drum (8) after the deceleration by the gearbox for deceleration is rotated to adjust the speed by pulling or extending the constant speed cable (6).

In particular, the constant speed driving switch 18 and the acceleration / deceleration switch 20 are installed in an operation unit 36 having a main body, and the operation unit is fixed to a grip part of the door side hand of the handle 38 to hold the handle. By allowing the thumb to operate in the state, it is possible to operate simply and easily without any interruption in driving.

In addition, when the constant speed driving switch 18 is turned off or the brake pedal 44 is pressed in an emergency in order to release the constant speed driving, the brake switch 22 is operated to cut off power of the system, so that the clutch plate 30 of the electromagnetic clutch 10 is stopped. ) Is separated from the friction plate 28 of the cable drum 8 so that the rotation of the cable drum 8 is free, and at the same time, the return of the accelerator pedal 2 becomes a normal driving state by the accelerator pedal.

As described above, the present invention can be provided at low cost because the system configuration is simple and low-cost parts are used, and since the system control is controlled by a controller of a simple configuration rather than a microcomputer, there is no risk of malfunction and the configuration is simple. As the failure rate can be significantly reduced, the reliability of the product can be maximized, and it can be easily applied to previously shipped vehicles, and it is possible to drive at constant speed at low speeds, especially in road bending or congestion as in Korea. It is a useful invention that can respond quickly and easily without interruption to safe operation even at frequent speed changes according to circumstances.

Claims (2)

A cable drum 8 positioned at an appropriate interval behind the connecting portion 4 of the accelerator pedal 2 and connected to the connecting portion by a constant speed cable 6, and an electron transmitting or blocking rotation force to the cable drum 8; And a clutch 10 and a motor 14 for transmitting the decelerated rotational force to the electromagnetic clutch, wherein the electromagnetic clutch 10 and the motor 14 are a constant speed driving switch 18 and an acceleration / deceleration switch 20 and A vehicle cruise control device characterized in that it is controlled by a controller (16) connected to the brake switch (22). The constant speed driving switch (18) and the acceleration / deceleration switch (20) of the steering wheel (38), characterized in that the vehicle's constant speed driving apparatus, characterized in that installed in the vicinity of the grip portion of the door side hand.