KR20110100907A

KR20110100907A - Vaccum generating modulator for electronic vehicles

Info

Publication number: KR20110100907A
Application number: KR1020100019991A
Authority: KR
Inventors: 한일진
Original assignee: (주)브이이엔에스
Priority date: 2010-03-05
Filing date: 2010-03-05
Publication date: 2011-09-15

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum pressure generating modulator of an electric vehicle, and more particularly, to a case, a first driving motor installed in the case to form a predetermined vacuum pressure, and a predetermined hydraulic pressure installed at one side of the first driving motor. And a second driving motor configured to control the operation of the first driving motor and the second driving motor according to predetermined detection signals provided from the various sensing units. And a vacuum pressure and a hydraulic pressure generated by the first driving motor and the second driving motor are controlled by an anti-lock brake system (ABS) and an electronic stability control system (ESC). By operating as a driving source of the system, it offers the advantages of reduced parts count and weight, and improved performance by precise vacuum control.

Description

Vacuum generating modulator for electronic vehicles

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum pressure generating modulator of an electric vehicle, and to a vacuum pressure generating modulator of an electric vehicle which can reduce the number of parts, reduce weight, and improve the performance of the vehicle according to the precise vacuum pressure control. .

Generally, the anti-lock brake system (ABS) is a special brake system developed to prevent the wheels from locking up when the vehicle suddenly brakes. When the car is running, the same weight is not applied to the four wheels. When braking in this state, some wheels lock-up, that is, the wheels are locked.

This refers to a state in which the wheels are completely stopped even though the vehicle is still traveling in the driving direction. At this time, the vehicle is slipped or pushed to the side so that the driver cannot properly control the driving direction of the vehicle.

In order to prevent this problem, the pump should be pumped to release the brakes as a means of preventing the lockup phenomenon, which is performed 10 times a second using an electronic control device or a mechanical device. It is the principle of the ABS to perform braking while repeating the above.

On the other hand, ESC (Electronic Stability Control) system is a system that stabilizes the behavior of the vehicle by generating a braking force using hydraulic pressure when the vehicle tries to exceed the limit performance when turning.

Here, the ABS operates the brake booster installed to engage in braking of the wheel using hydraulic pressure, and the ESC also uses hydraulic pressure as its power source. As an initial operating source for generating this hydraulic pressure, vacuum pressure was usefully used.

However, an automobile operated by a combustion engine according to the prior art obtains a vacuum pressure from the driving force of the engine, and does not require a separate drive motor for forming a vacuum pressure, whereas an electronic control unit (ECU) for controlling the engine module is provided. It is difficult to control precisely because the vacuum pressure generation control is performed by the Electronic Control Unit (ECU), and it is cumbersome to control each by an electronic control unit (ECU) provided separately.

In addition, recently, in order to solve the problem of environmental pollution in the combustion engine as described above, an electric vehicle driven by electric force has been released. In this case, there is no combustion engine and a separate driving motor must be provided. Of course, there was a problem that a separate ECU must be provided.

The present invention has been made in order to solve the above technical problem, unlike the conventional one provided with a separate drive motor and a separate ECU to generate a vacuum pressure for the implementation of ABS and ESC of one modular electric vehicle It is an object to provide a vacuum generation modulator.

The vacuum pressure generating modulator of an electric vehicle according to the present invention includes a case, a first driving motor installed in the case to form a predetermined vacuum pressure, and a side of the first driving motor to form a predetermined hydraulic pressure. An electronic control unit (ECU) installed in the second driving motor and the case and controlling the operation of the first driving motor and the second driving motor according to a predetermined detection signal provided from various sensing units. The vacuum pressure and the hydraulic pressure formed by the first drive motor and the second drive motor includes an anti-lock brake system (ABS) and an electronic stability control system (ESC). It can be operated as a drive source.

Here, the vacuum pressure generating modulator of the electric vehicle according to the present invention, the battery modulator is installed in the vehicle body, the connecting portion is installed in the case, the connecting portion for mediating the connection of the wire so that power is supplied from the battery modulator to the single drive motor. It may include.

In addition, the electronic control unit (ECU), the anti-lock brake system (ABS) is installed in the vehicle body in accordance with the signal input from the various detection unit is installed in the various operating unit for detecting a specific operation and The operation of the first driving motor and the second driving motor which is a driving source of an electronic stability control system (ESC) may be controlled.

Here, the various detection unit may include a wheel speed sensor for detecting the driving speed of the vehicle, a lateral G sensor and a yaw rate sensor for detecting the yaw moment when the vehicle is turning, and a steering angle sensor for detecting the amount of rotation of the steering wheel. have.

In the vacuum pressure generating modulator of an electric vehicle according to the present invention, a first driving motor and a second driving motor for providing a driving source to a vacuum pump are modularly provided in one case, and the first driving motor and the second driving are provided. Parts saving and weight reduction effect are expected by including an electronic control unit capable of controlling ABS and ESC at the same time using the vacuum pressure generated from the vacuum pump operated by the driving force provided from the motor.

In addition, the vacuum pressure generation modulator of the electric vehicle according to the present invention can be expected to improve the performance of the vehicle bar can be precisely controlled vacuum pressure.

Hereinafter, a preferred embodiment of a vacuum pressure generating modulator of an electric vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing a vacuum pressure generating modulator of an electric vehicle according to the present invention, Figure 2 is a schematic diagram showing the vacuum pressure generating modulator of the electric vehicle according to the present invention observed in the direction of arrow A of FIG.

1 and 2, the vacuum pressure generating modulator 1 of the electric vehicle according to the present invention may be provided with a predetermined vacuum pressure by a case 10 and a vacuum pump (not shown) installed in the case 10. A first drive motor 20 to provide a driving force to generate and a second drive motor installed in the case 10, providing a predetermined driving force to provide hydraulic pressure to the brake booster (not shown) of the ABS and ESC system 30 and an electronic control installed in the case 10 to control the operation of the first driving motor 20 and the second driving motor 30 according to predetermined detection signals provided from various sensing units. Unit 40 (ECU: Electronic Control Unit).

That is, in the related art, one drive motor (ie, a second drive motor indicated by reference numeral 30) provided for providing hydraulic pressure to the brake booster of the existing ESC system and the ECU for controlling its operation are provided. Although one modularization is implemented, the vacuum pressure generation modulator 1 of the electric vehicle according to the present invention generates a separate vacuum pressure in the case 10 serving as a main body of the existing modularized ABS and ESC systems. The first driving motor 20 is further provided to provide a vacuum pressure generation modulator of the modular electric vehicle of a more improved shape so that the first driving motor 20 is simultaneously controlled by the ECU.

An intake port 31 may be formed outside the case 10 to suck air into the vacuum pump, and a discharge port 33 through which the sucked air is discharged to the outside so as to generate a vacuum pressure by the vacuum pump is provided. ) May be formed.

The air sucked into the vacuum pump through the intake port 31 is supplied with the driving force of the first driving motor 20 to generate a vacuum pressure and exits through the discharge port 33 to the outside.

The vacuum pump is a device for generating and supplying the vacuum pressure required for the ABS and ESC system, and serves to supply the generated vacuum pressure to the ABS and ESC system under appropriate requirements.

However, the biggest feature of the present invention described in the embodiment of the vacuum pressure generating modulator 1 of the electric vehicle according to the present invention, the vacuum pressure generated in the vacuum pump under any conditions through the path and ABS and It is not about supplying to an ESC system, but a modular vacuum generating modulator (1) for operating the above two systems using the vacuum pressure generated in the vacuum pump. The description will be omitted.

Here, ABS is an abbreviation of Anti Brake System, and is a means for preventing a so-called lock-up phenomenon in which wheels are locked when braking a vehicle. This pumping operation is a kind of brake system using the principle that braking is performed by repeating 10 times or more per second using an electronic control device or a mechanical device for providing the driver's convenience and accuracy.

In addition, the ESC stands for Electronic Stability Control, and refers to a system that stabilizes the behavior of the vehicle by generating a braking force using hydraulic pressure when the vehicle tries to exceed the limit performance when turning.

Both the ABS and the ESC are optimally implemented through braking of appropriate wheels by the operation of a brake booster (not shown) using hydraulic pressure, wherein the vacuum generated from the vacuum pump is used as a driving source for operating the hydraulic pressure. Pneumatics can be used.

A petroleum fuel engine, such as a conventional gasoline (or diesel) engine, allows the vacuum pump to generate a vacuum pressure by using a pressure caused by suction pressure drawn into an intake manifold (not shown) when the engine burns. As the development of the vehicle, the petroleum fuel engine has been deleted because there is no need for it, and in the case of an electric vehicle, the first driving motor 20 for generating a vacuum pressure in the vacuum pump is further needed.

However, in the related art, since the first driving motor 20 itself was not necessary, the second driving motor 30 was controlled by the ECU 50. Specifically, hydraulic pressure is applied to the brake booster. The ECU controlled the operation of the second driving motor 30 according to a detection result of a vacuum sensor that senses whether to supply. In addition, conventionally, a vacuum pump is provided near the engine, and in order to generate the vacuum pressure by the vacuum pump, an engine ECU for controlling the interlocking operation with the intake manifold of the engine has been separately provided.

However, according to an exemplary embodiment of the present invention, the first driving motor 20 is additionally disposed in the case 10 that serves as a main body of the existing ECU module, and the operation of the existing ESC is performed. By controlling the ECU to control the operation of the first drive motor 20 according to the detection value of the vacuum pressure sensor located in the brake booster, of course, a separate ECU is not required, more precise vacuum pressure operation Control is enabled.

The first driving motor 20 is a component for providing a predetermined driving source to the vacuum pump to generate a predetermined vacuum pressure required for the ESC and the ABS. As described above, in the case of an electric vehicle, the petroleum fuel engine Bar is not provided, the first drive motor 20 and the second drive motor 30 serves as an essential configuration.

Meanwhile, the vacuum pressure generating modulator 1 of the electric vehicle according to the present invention further includes a battery modulator (not shown) for supplying power to the first driving motor 20 and the second driving motor 30.

The battery modulator is modularly mounted on the lower side or one side of the vehicle body to provide power to all the electric driving units that electrically operate the electric vehicle.

Here, the battery modulator and the case 10 are energized by a wire, and the case 10 is provided with a connecting unit 50 for connecting the wires.

In addition, the vacuum pressure generation modulator 1 of the electric vehicle according to the present invention, the electronic control for controlling the operation of the ABS and the ESC system in accordance with a predetermined signal input from various sensing units (not shown) installed in the vehicle It further includes a unit 40 (ECU: Electronic Control Unit, hereinafter abbreviated as "ECU").

Here, the ECU 40, as described above, is not provided separately for the operation control of the ABS and the ESC system, but serves as an integrated control unit for simultaneously controlling the ABS and the ESC system at the same time. do.

In addition, although the various sensing units input to the ECU 40 are generally all sensing units capable of converting various variables required for driving the ABS and the ESC system into predetermined signals, in the present invention, the wheel speed sensor ( Vehicle speed), lateral G-sensor and yaw rate sensor (when yaw moment is detected when the vehicle is turning), steering angle sensor (sense of rotation of steering wheel), and the like.

For example, when the running speed of the vehicle detected by the wheel speed sensor is suddenly changed, the ECU 40 significantly increases the deceleration width by excessively braking the driver by applying a brake, or the lateral G sensor and yaw rate. When the turning degree of the vehicle sensed by the sensor and the steering angle sensor is sharply increased, the stability of the vehicle while driving may be increased by simultaneously controlling the operation of the ABS and the ESC system.

In more detail, when a predetermined signal is input from the above-described various sensing units, the ECU 40 determines whether to control only the ABS or only the ESC system, and then the driving source of the corresponding system. The hydraulically actuated operation is controlled by generating a vacuum pressure having a constant pressure from the vacuum pump.

As such, the vacuum pressure generation modulator 1 of the electric vehicle according to the present invention includes the first driving motor 20 and the second in order to control operation of the ABS and the ESC system by one ECU 40. The operation is controlled by the drive motor 30 so that a predetermined vacuum pressure is generated. The number of parts is reduced, thereby reducing the weight and manufacturing cost of the product, while maintaining the stability of the vehicle under sophisticated vacuum pressure control. There is also an advantage to improve.

Reference numeral 35 is a brake tube connector that sucks air from the brake booster.

In the above, a preferred embodiment of the vacuum pressure generating modulator of an electric vehicle according to the present invention has been described in detail with reference to the accompanying drawings. However, embodiments of the present invention are not limited thereto, and it is obvious that various modifications or other embodiments falling within the scope equivalent to the present invention may be implemented by those skilled in the art. Therefore, the true scope of the present invention will be defined by the claims that follow.

1 is a schematic diagram showing a vacuum pressure generation modulator of an electric vehicle according to the present invention,
FIG. 2 is a schematic diagram showing a vacuum pressure generating modulator of an electric vehicle according to the present invention observed in the direction of arrow A of FIG. 1.
<Explanation of symbols on main parts of the drawings>
1: vacuum generation modulator 10: case
20: first drive motor 30: second drive motor
31: intake port 33: discharge port
35: Brake tube connector 40: Electronic control unit (ECU)
50: connecting part

Claims

A case;
A first driving motor installed in the case to form a predetermined vacuum pressure;
A second driving motor installed at one side of the first driving motor to form a predetermined hydraulic pressure;
An electronic control unit (ECU) installed in the case and controlling an operation of the first driving motor and the second driving motor according to a predetermined detection signal provided from various sensing units,
The vacuum pressure and hydraulic pressure generated by the first driving motor and the second driving motor are operated as a driving source of an anti-lock brake system (ABS) and an electronic stability control system (ESC). Vacuum pressure modulator for electric vehicles.

The method according to claim 1,
A battery modulator installed in the vehicle body;
And a connecting unit installed in the case and configured to connect a wire so that power is supplied from the battery modulator to the single driving motor.

The method according to claim 1,
The electronic control unit (ECU),
The anti-lock brake system (ABS) and the electronic stability control system (ESC) are installed in the vehicle body and installed in various operation parts according to signals input from various detection parts for detecting a specific operation. The vacuum pressure generating modulator of the electric vehicle for controlling the operation of the first driving motor and the second driving motor which is a driving source.

The method according to claim 3,
The various detection unit,
A vacuum pressure generation modulator of an electric vehicle including a wheel speed sensor for detecting a driving speed of a vehicle, a lateral G sensor and a yaw rate sensor for detecting a yaw moment when the vehicle is turning, and a steering angle sensor for detecting a rotation amount of a steering wheel.