KR19980048342A - Engine Idling Control Device for Inertial Driving of Automatic Transmission Vehicles - Google Patents

Abstract

The present invention relates to an engine idling control device for inertial driving of an automatic transmission vehicle. When inertial driving occurs by shifting from D → N → D without vehicle acceleration and braking, the engine speed is automatically increased and appropriate. Keep the idling state, but the vehicle speed is above a certain value, and the opening angle of the throttle valve is changed according to whether the acceleration and brake pedals are operated so that the shift from N to D is made when the idling speed is increased. The inertia and inertia prevent the engine brake and its impact, and also provide the optimum driving stability, as well as the noise caused by the unstable operation and the damage of the foot mechanism.

Description

Engine Idling Control Device for Inertial Driving of Automatic Transmission Vehicles

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine idling control apparatus for inertial driving of an automatic transmission vehicle, in particular, in a state in which a vehicle is traveling at a certain speed or more, without a driver's foot intentional or inadvertent due to intentional or inadvertent operation of the vehicle. The present invention relates to an engine idling control apparatus for inertial driving of an automatic transmission vehicle in which a gear shift lever is shifted from the D driving mode to the N position and the shock shift is prevented when the shift lever is shifted to the D position.

In general, if the vehicle speed is 100km / h or more when the automatic transmission vehicle is running, the engine speed (RPM) is displayed at about 2,700 to 3,000.In this state, the driver arbitrarily or unknowingly shifts the shift lever from D → N and removes it from the accelerator pedal. When you take your foot off, the engine speed drops to 800 RPM, the idling speed within 2 to 3 seconds, but the speed of the vehicle falls very slowly at 100 km / h by inertia unless you press the brake pedal. Depending on various external conditions, such as the condition of the car or the condition of the vehicle, a few minutes will harden and then cost down.

Afterwards, when the driver switches the shift lever back from N to D again to maintain the driving state, the hydraulic circuit in the transmission is connected to the D state.

However, when the inertia is running at N, the engine is idling and the rotation speed is very low, but the inertia driving speed of the vehicle is very high. Inversely to the normal driving, the inertia elasticity of the vehicle rotates the output shaft of the tire, drive shaft, and transmission. After shifting the shift lever to D while driving the rear gear at the D position and the oil pump to form the line pressure, the vehicle rotates the drive plate again through the transmission.

In addition, the reverse operation to rotate the crankshaft integrated in the drive plate occurs, the elasticity is applied to the engine driven at a low speed to drive at a higher rotational speed.

At this time, since the throttle valve is almost closed and is not accelerated, a so-called engine brake is formed in the engine combustion chamber in which a strong suction pressure is formed.

In conclusion, if the engine shifts to the D position without stepping on the accelerator pedal in the state of elastic driving in the N position, a powerful engine brake occurs, causing a sudden impact and noise to the vehicle.

Therefore, if you want to continue driving in the D position while driving on elasticity, press the accelerator pedal to increase the engine speed appropriately before shifting to the D position, and then shift to the D position to prevent engine brake and the resulting shock. However, even an experienced driver can hardly adjust the engine speed to the current speed of inertia.

It is an object of the present invention to provide an engine idling control apparatus for inertial driving of an automatic transmission vehicle to prevent engine brake during inertial driving and thereby prevent shock and noise generation.

In order to achieve the above object, when the inertial driving occurs by shifting D → N → D in a state in which the vehicle is not accelerated and braked, the engine speed is automatically increased to maintain an appropriate idling state. , Connect the ignition key switch and the vehicle speed sensor of the transmission, connect the vehicle speed sensor and the switching controller between the ignition key switch and the vehicle speed sensor, connect the controller, the accelerator pedal operation detection switch and the N position detection switch in sequence, and also the N position Connect the transmission gear shift lever to the sensing switch, and connect the brake operation detecting switch to the brake pedal to the N position sensing switch.

And a throttle lever connected to the N position detecting switch, a motor overload protection relay, a motor, a spiral spring, and a cable lever sequentially, a throttle valve connected to a valve shaft inside the throttle body, and a throttle lever connected to an outside of the valve shaft. Connect idle idle throttle lever to the outer end of the valve shaft.

In addition, the cable lever, the upper part of the idle up throttle lever is connected by a cable wire, the acceleration cable is connected to the throttle lever, and one end of the idle up throttle lever is connected to the throttle body by a spring.

1 is an exploded perspective view of main parts of a general accelerator.

2 is a configuration diagram of the engine idling control device of the present invention.

* Description of the symbols for the main parts of the drawings *

10: battery 20: fuse

30: Ignition key switch 40: Transmission

50: vehicle speed sensor 60: controller

70: acceleration pedal operation detection switch 71: fixed contact

72: movable contact 73: push rod

74,250; spring 80: acceleration pedal

90: N position detection switch 100: shift lever

110: brake pedal 120: brake operation detection switch

130: overload protection relay 140: motor

150: spiral spring 160: cable lever

170,171: stopper 180: throttle body

190: valve shaft 200: throttle valve

210: Throttle lever 220: Children up throttle lever

230: cable wire 240: acceleration cable

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

1 is an exploded perspective view of main parts of a general accelerator, and FIG. 2 is a block diagram of an engine idling control device of the present invention.

The ignition key switch 30 of the second stage is connected through the battery 10 and the fuse 20, the ignition key switch 30 is connected to the vehicle speed sensor 50 of the transmission 40, and the vehicle speed sensor 50. ) And the switching controller 60 between the ignition key switch 30 and the vehicle speed sensor 50.

Connecting an accelerator pedal operation detecting switch (70) to the controller (60); The accelerator pedal operation detecting switch 70 is integral with the fixed contact 71, the movable contact 72, and the movable contact 72, and the push rod 73 and the push rod 73 which are always in contact with the accelerator pedal 80. It includes a spring (74) to give elasticity to.

The N position detecting switch 90 is connected to the fixed contact 71 of the accelerator pedal operation detecting switch 70, the transmission gear shift lever 100 is contacted with the N position detecting switch 90, and the N position detecting switch Connect the brake operation detecting switch 120 which is in contact with the brake pedal 110 to (90).

The N position detecting switch 90 is connected to the motor overload protection relay 130, the motor overload protection relay 130 is connected to the motor 140, and the spiral spring 150 is connected to the shaft of the motor 140. While connecting one end of the cable lever 160 to the spiral spring 150.

The stopper 170 and 171 are installed at both sides of the motor 140 to limit the rotation angle of the cable lever 160, and the throttle body 180 is located at one side of the motor 140. It includes a throttle valve 200 connected to the valve shaft 190 therein, and a throttle lever 210 connected to the outside of the valve shaft 190.

An idle up throttle lever 220 is connected to an outer end of the valve shaft 190, an upper end of the cable lever 160 and an idle up throttle lever 220 is connected to a cable wire 230, and a draw lever The accelerator cable 240 is connected to the 210, and one end of the idle up throttle lever 220 is connected to the throttle body 180 by the spring 250.

Therefore, the engine idling control device for driving the inertia of the automatic transmission vehicle of the present invention releases the foot from the accelerator pedal 80 that the driver stepped on while driving the vehicle, and operates the brake pedal while shifting the shift lever 100 from D to N. If not, the vehicle speed sensor 50 detects the output rotation speed of the transmission 40, and if the rotation speed is greater than or equal to a predetermined value, the controller 60 turns ON when a signal is applied to the controller 60, and at the same time, the accelerator pedal operation detection switch 70 Apply a signal.

In this case, since the accelerator pedal 80 is not operated, a signal is applied to the N position detecting switch 90 again, and the signal is applied to the brake operation detecting switch 120 because the shift lever 100 is in a neutral (N) state. do.

In addition, since the brake pedal 110 is not pressed, a signal is applied to the motor overload protection relay 130, and the overload protection relay 130 is applied to the motor 140 as a state in which no electrical load is input.

Thereafter, the motor 140 operates clockwise to pull the cable lever 160 to the right, thereby pulling the cable wire 230, the idle up throttle lever 220, and the throttle lever 210 while pulling the valve shaft ( 190, the throttle valve 220 is rotated and opened, and since the intake air is supplied to the throttle body 180 by the opening angle of the throttle valve 200, the engine speed increases by a predetermined value.

Since the engine speed is increased in this way, even if the driver does not step on the accelerator pedal 80, the same effect is obtained, and smooth and stable driving is performed without generating an engine brake due to inertia.

Since the engine idle speed is determined by the rotation angle of the cable lever 160, it can be set by adjusting the position of the stoppers 170 and 171 or adjusting the length of the cable wire 230, and the adjustment value is about It is desirable that the engine speed is about 2,000 RPM at a driving speed of 30 km / h or more.

On the other hand, the operation state of the motor 140 is interrupted and stopped by the motor overload protection relay 130 after a predetermined time elapses, and when the inertial driving state of the vehicle is resolved, the spiral spring 150 and the spring 250 may be used. Each operating part is returned to its original position.

The overload protection relay 130 may set the temporary release operation at an interval of about 1 second, and in this case, the increased engine speed is raised again because the overload protection relay 130 is reactivated before falling completely into an idle state.

As an example, the engine speed is increased to 2,000PPM and maintained for 3 to 5 seconds, and when the motor 140 is stopped by the relay 130 due to overload, a temporary release of about 1 second occurs, and the engine speed is 1,500 It drops to ~ 1,700 RPM and then restarts, rising to 2,000 RPM and holding for 3 to 5 seconds.

The device release of the present invention is not only when the engine start is turned OFF or the ignition key switch 30 is turned OFF, but the signal generated by the vehicle speed sensor 50 is not constant because the traveling speed of the vehicle is equal to or lower than a predetermined value. The accelerator pedal operation detection switch 70 is turned off by stepping on the accelerator pedal 80, the shift lever 100 is shifted from a position other than N to another position, the N position detection switch 90 is turned off, or the brake When the pedal 110 is braked or the brake operation detection switch 120 is in the OFF state, if one of these requirements is satisfied, the device is not operated.

As described above, the engine idling control device in the inertial driving of the automatic transmission vehicle according to the present invention automatically increases the engine speed when the vehicle shifts from D → N → D while the vehicle is not accelerated and braked to maintain an appropriate idling state. By doing so, it is possible to prevent the engine brake due to the driving inertia and the impact thereof, and also to prevent the noise caused by the unstable operation and the damage to the mechanisms of the parts, and to provide the optimum running stability.

Claims (8)

Acceleration to check whether the accelerator pedal and brake pedal are operated by the driver during the shift of N → D shift, in order to prevent engine brake due to driving inertia when shifting from D → N → D without acceleration and braking. And an engine speed control means for increasing the engine speed to an appropriate value by increasing the opening angle of the throttle valve when shifting from N to D according to the braking detecting means and the signal detected from the acceleration and braking detecting means. Engine idling control device for inertial driving of automatic transmission vehicles. According to claim 1, The acceleration and braking detection means, the ignition key switch and the vehicle speed sensor is connected, the controller connected between the vehicle speed sensor and the ignition key switch and the vehicle speed sensor, the accelerator pedal operation detection switch connected to the controller, the acceleration The engine idling control device for inertial driving of an automatic transmission, characterized in that the pedal position detection switch 70 is connected to the gear shift lever in contact with the N position detection switch, and the brake operation detection switch in contact with the brake pedal. According to claim 1 or claim 2, wherein the engine speed control means, the motor connected to the N position detection switch, the cable lever connected to the motor, and the idle up throttle lever connected to the throttle lever of the throttle body integrally rotatable; And a cable wire connecting the cable lever and the idle up throttle lever to open and close the throttle valve by driving the motor. 4. The engine idling control device according to claim 3, wherein an overload protection relay is connected to the motor. [4] The engine idling control apparatus of claim 3, wherein a spiral spring is connected between the motor and the cable lever. 4. The engine idling control device according to claim 3, wherein a plurality of corresponding stoppers are fixed to the motor to regulate the rotation angle of the cable lever. The apparatus of claim 3, wherein the idle up throttle lever is spring-connected to the throttle body. 7. The engine idling control device according to claim 6, wherein the stopper is adjustable.