KR100696255B1 - Speed change ratio variable system of automatic transmission - Google Patents

Abstract

A transmission gear ratio varying device of an automatic transmission is provided to decrease RPM(Revolution Per Minute) by keeping a vehicle in an idle state by changing a drive mode into a neutral mode when the speed is not needed to be increased or decreased while driving. The transmission gear ratio varying device of an automatic transmission is composed of an inclination angle detecting sensor(10) detecting the inclination angle of a vehicle and generating an inclination angle signal when the vehicle inclines over a predetermined angle; a brake sensor(20) generating a signal by detecting an operation state of a brake pedal; an accelerator sensor(30) generating a signal by detecting an operation state of an accelerator pedal; an inhibitor switch(50) detecting whether the automatic transmission is in a D-range or not; and a control unit(60) changing the automatic transmission to an N-range when the inclination angle detecting sensor does not generate an inclination angle signal, the brake sensor is not operated as a brake is not operated, the accelerator sensor is operated while the accelerator pedal is not operated, a vehicle speed sensor(40) detects that the vehicle speed is over 30km/H, and the inhibitor switch is operated as the automatic transmission is positioned in a D-range, and changing the automatic transmission into a D-range when the inclination angle detecting sensor generates the inclination angle signal, the brake sensor is operated as the brake is operated, the accelerator sensor is not operated while the accelerator pedal is used, and the vehicle speed sensor detects that the vehicle speed is below 30km/H. The inclination angle detecting sensor has an elliptical rotary weight shaft-installed to a pin and a contact part formed at one side and short-circuited when the rotary weight is turned by the inclination angle.

Description

SPEED CHANGE RATIO VARIABLE SYSTEM OF AUTOMATIC TRANSMISSION}

1 is a block diagram showing the configuration of a transmission ratio variable device of an automatic transmission according to the present invention;

2 is an explanatory diagram showing a configuration of an inclination detection sensor of a shift ratio variable device of an automatic transmission according to the present invention;

Figure 3 is a flow chart showing the operation sequence of the speed ratio variable apparatus of the automatic transmission according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: tilt detection sensor 11: pin

12: rotary weight 13: contact portion

20: brake sensor 30: accelerator sensor

40: vehicle speed detection sensor 50: inhibition sensor

60: control unit

The present invention relates to a transmission ratio variable device of an automatic transmission, and in particular, when the automatic transmission vehicle does not need to accelerate or decelerate while driving, the automatic transmission is switched from the driving mode to the neutral mode to maintain the vehicle in idling state per minute of the vehicle. The present invention relates to a transmission ratio variable device of an automatic transmission that can reduce fuel consumption and prevent pollution by reducing a rotation speed (RPM).

In general, a transmission used in an automobile is classified into a manual transmission in which a person shifts according to a shift method, an automatic transmission that can be automatically shifted, and a continuously variable transmission.

The transmission converts the rotational force of the engine and transmits it to the driving wheels, and makes the engine idle when stopped and changes the rotational direction of the driving wheels to enable reverse operation.

Among the transmissions described above, the automatic transmission is provided with an input shaft that receives torque from the crankshaft of the engine via a torque converter, and the power transmission path is operated by operating a plurality of sets of planetary gear sets and the elements of the planetary gear set. The friction engagement element is composed of a clutch and a brake for switching the.

These frictional engagement elements are automatically turned on and off according to the driving conditions of the vehicle and the load of the engine to supply the working fluid. The frictional engagement elements are selectively engaged by a hydraulic control device composed of a plurality of solenoid valves to change the torque of the engine. Torque is transmitted to the drive wheel through the output shaft.

The hydraulic control device determines the shift point by the pressure of the hydraulic oil and activates the multi-plate clutch or the multi-plate brake.

As such, there is no need for cumbersome operation of the clutch and the shift lever, and since the shift is suitable for the output of the engine, it is frequently used due to the convenience.

These automatic transmissions do not need to shift gears while driving, and can prevent engine stoppages due to inexperienced operation, which can reduce driver's fatigue. Has a good ride comfort.

Another advantage is that the fluid acts as a damper, which can absorb vibrations or shocks from the engine to the power train, wheels, or other parts, or vice versa. It has the advantage of protecting the engine and extending the life of each part because it is not directly applied to the engine even when it is overloaded and overloaded.

However, the automatic transmission has a disadvantage in that its structure is complicated and expensive, and the consumption rate of fuel is about 10% higher than that of the manual transmission.

Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and when the automatic transmission vehicle does not need acceleration or decelerate while driving, the automatic transmission is switched from the driving mode to the neutral mode to maintain the vehicle in the idling state. By reducing the vehicle's revolution per minute (RPM), it reduces fuel consumption, compensates for the shortcomings of the automatic transmission, and provides a variable speed ratio variable device for an automatic transmission that can prevent pollution due to reduced fuel consumption. There is this.

In order to achieve the above object, the present invention is to be installed on the pin so as to generate an inclination angle signal to detect the inclination of the vehicle inclined more than a certain angle, and to form a rotatable elliptical rotatable weight and the rotation is rotated by the tilt angle A tilt sensor that has a contact at one side to be short-circuited, a brake sensor that generates a signal by detecting the operation of the brake pedal, an accelerator sensor that generates a signal by detecting the operation of the accelerator pedal, and a vehicle A vehicle speed sensor that detects a vehicle speed and generates a signal when the speed is more than 30 km / H, an activity switch that detects whether the automatic transmission of the vehicle is in the "D" range, and the tilt sensor detects a tilt angle signal. If it does not occur, the brake sensor does not work because the brake is not operated, and the accelerator pedal does not work. In this state, if the accelerator sensor operates, if the vehicle speed is more than 30km / H, the vehicle speed detection sensor judges whether the automatic transmission is located in the "D" range, and the inactivity switch operates. When the position of the automatic transmission is converted to the "N" range and the inclination sensor generates an inclination angle signal, when the brake sensor is operated by operating the brake, when the accelerator sensor is not operated using the accelerator pedal, When the vehicle speed detecting sensor determines that the speed is 30 km / H or less, the variable speed ratio variable apparatus of the automatic transmission is characterized in that it is composed of a control unit that is converted to the "D" range.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above in detail as follows.

1 is a block diagram showing the configuration of a transmission ratio variable device of an automatic transmission according to the present invention;

2 is an explanatory view showing the configuration of the inclination detection sensor of the shift ratio variable apparatus of the automatic transmission according to the present invention.

As shown therein, the shift ratio variable device of the automatic transmission of the present invention detects the inclination of the vehicle when the vehicle travels downhill and generates an inclination angle signal to be turned on when the vehicle is inclined more than a predetermined angle and off when the vehicle is out of the inclined surface. Forming the inclination detection sensor 10 to use the brake pedal on the downhill road to enable the use of the engine block.

In this way, when the brake pedal is operated, a detection signal is not generated. When the brake pedal is used, the brake sensor 20 detects when the brake pedal is turned on and generates a signal. Also, when the accelerator pedal is operated, the brake pedal is turned off. The accelerator sensor 30 is formed.

On the other hand, when the vehicle speed is more than 30km / H to form a vehicle speed sensor 40 to detect the vehicle speed to generate a signal and at the same time "D" range for detecting whether the automatic transmission 51 of the vehicle "D" range state When the state is in the state to form an activity switch 50 for turning on the transmission ratio variable device of the automatic transmission.

When the inclination sensor 10 does not generate a signal of the inclination angle, the brake sensor 20 does not operate because the brake does not operate, and the accelerator sensor 30 does not operate the accelerator pedal. If the vehicle speed is 30km / H or more when the vehicle speed detection sensor 40 is determined, and the automatic transmission 51 is located in the "D" range when the activity switch 50 is operated When all the cases are detected, when the position of the automatic transmission 51 is converted to the "N" range and the inclination detection sensor 10 generates the inclination angle signal, when the brake sensor 20 operates by operating the brake, When the accelerator sensor 30 does not operate using the accelerator pedal, when the vehicle speed detection sensor 40 determines that the vehicle speed is 30 km / H or less, the transmission control unit (TCU) is converted into a "D" range. It consists of the control part 60.

The inclination detection sensor 10 of the transmission ratio variable device of the automatic transmission according to the deceleration as described above is arranged on the pin 11 to build up a rotatable elliptical rotary weight 12 and the rotary weight 12 is inclined by the inclination angle. Contact portion 13 is formed on one side to be short-circuited when rotating, but the rotary weight 12 prevents the malfunction by preventing the shaking according to the road condition as the upper and lower distance ratios in the pin 11 are as small as possible. It is preferable to minimize the upper and lower distance ratios of the pin 11 of 12).

Referring to the operation and effect of the present invention configured as described above by the flow chart of Figure 3 as follows.

First, it is determined whether the vehicle is started to apply power to the vehicle. (S1)

When the vehicle is started, it is determined whether the automatic transmission is the "D" range through the inhibitor switch 50. (S2)

When the position of the automatic transmission is in the "D" range, it detects the inclination angle of the car and determines whether the car is inclined forward by a predetermined angle or more through the inclination sensor 10. (S3)

As such, when the vehicle is inclined at a predetermined angle or less, it is determined whether the brake is used or not through the brake sensor 20 (S4).

When the brake pedal is not used through the brake sensor 20 as described above, it is determined through the accelerator sensor 30 whether the accelerator pedal is used or not (S5).

When the accelerator pedal is not used through the accelerator sensor 30, the speed sensor 40 determines whether the vehicle speed is 30 km / H or more.

Starting as described above, the position of the inhibitor switch 50 is the "D" range, the inclination detection sensor 10 does not operate, and receives a signal not using the brake through the brake sensor 20, The accelerator sensor 30 receives a signal that does not use the accelerator pedal, and when the speed of the vehicle is 30 km / H or more through the speed sensor 40, the speed is shifted to the "N" range.

When the inhibitor switch 50, the inclination detection sensor 10, the brake sensor 20, the accelerator sensor 30, and the speed detection sensor 40 are opposite to the above situation, the "D" range is maintained. (S8)

The shift ratio variable apparatus of the automatic transmission according to the deceleration as described above will be described as an example.

When the vehicle is stopped at a predictable distance while driving at 80 km / h, it is possible to drive to the stop line at a speed of 70 km due to the minimum driving inertia without depending on the power of the car 500 km before the stop. You can drive without driving.

As such, the present invention reduces the rotational force of about 50% compared to 1500rpm to 1600rpm generated when traveling at about 80km per hour by rotating the engine at 750 ~ 800rpm in the "N" range, thereby reducing the consumption of fuel by the engine speed. You save.

In addition, if the driving condition is higher than the required driving speed during normal driving, if the accelerator pedal is not operated, the deceleration is made by the engine block, so the speed is lowered and the pedal is pressed regularly to maintain the speed. Maintaining the output of the engine will not slow it down.

In the case of a ramp, the engine rotates about 2,100 rpm in a conventional automatic transmission when driving on a highway at 100 km / h.

In this case, if the transmission ratio variable device of the automatic transmission is used, the automatic transmission will be driven by the driving inertia at the engine idling speed of 800rpm at the position of "N" range. same.

Conventional automatic transmission

When driving at 100 km / h and driving 1.5 km, the engine speed becomes 2100 rpm.

It consumes 2100rpm × 1500km = 3,150,000rpm.

Automatic Transmission Shift Ratio Variable Device

When driving at 100 km / h and driving 1.5 km, the engine speed becomes 800 rpm.

It consumes 2100rpm × 800km = 1,200,000rpm.

As described above, when comparing the conventional automatic transmission and the variable speed transmission variable apparatus of the present invention, the conventional automatic transmission speed is 3,150,000 rpm and the transmission ratio variable device of the automatic transmission generates 1,200,000 rpm engine torque, resulting in a difference in torque of 1,950,000 rpm. In the driving condition under the above conditions, the fuel consumption can be reduced by 62%, which is economical and can reduce environmental pollution.

In addition, assuming that the 70km, for example, 70km when driving on the road, the conventional automatic transmission rotates the engine at 1500rpm and the automatic transmission transmission ratio variable device of the present invention is rotated at 800rpm, so the conventional automatic transmission is 750,000rpm And the automatic transmission shift ratio variable device of the present invention is 400,000rpm by reducing the engine speed by 350,000rpm can achieve an effect of about 46.6% fuel savings.

Automatic transmission shift ratio variable device of the present invention as described above is more effective in a constant speed, such as a highway can be driven rather than running on the frequent brake pedal and accelerator pedal.

As described above, in the present invention, when the vehicle for automatic transmission does not require acceleration or reduces speed while driving, the automatic transmission switches from the driving mode to the neutral mode to maintain the vehicle in idle state, thereby improving the RPM per minute of the vehicle. By reducing fuel consumption, it is possible to compensate for the biggest shortcomings of automatic transmissions and to prevent pollution due to reduced fuel consumption.

In the above, the present invention has been illustrated and described with reference to certain preferred embodiments, but the present invention is not limited to the above-described embodiments and the general knowledge in the art to which the present invention pertains without departing from the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (2)

A tilt sensor 10 for detecting a tilt of the vehicle and generating a tilt angle signal when the vehicle is tilted more than a predetermined angle; A brake sensor 20 which detects whether the brake pedal is operated and generates a signal; An accelerator sensor 30 which detects whether an accelerator pedal is operated and generates a signal; A vehicle speed sensor 40 for detecting a vehicle speed and generating a signal when the vehicle speed is 30 km / H or more; An activity switch 50 for detecting whether the automatic transmission 51 of the vehicle is in the "D" range; When the inclination sensor 10 does not generate a signal of the inclination angle, the brake sensor 20 does not operate because the brake is not operated, and the accelerator sensor 30 operates in a state where the accelerator pedal is not operated. And when the vehicle speed sensor 30 determines that the vehicle speed is 30 km / H or more, and the case where the automatic switch 50 is operated at the “D” range when the automatic transmission 51 is positioned. When detected, the position of the automatic transmission 51 is converted to the "N" range, and when the tilt sensor 10 generates an inclination angle signal, when the brake sensor 20 is operated by operating the brake, the accelerator pedal is operated. When the accelerator sensor 30 is not in use, the vehicle speed is 30km / H or less when the vehicle speed sensor 40 determines that the control unit 60 is converted to the "D" range, characterized in that Variable transmission ratio of automatic transmission In the apparatus, The inclination detecting sensor 10 has a contact portion 13 at one side such that the inclined elliptical rotary weight 12 is built up on the pin 11 and shorted when the rotary weight 12 is rotated by an inclination angle. A shift ratio variable device of an automatic transmission, characterized in that it is formed. delete

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