KR20030032521A - Controlling Apparatus and Method of Electronic Turbochager of Internal Combustion Engine - Google Patents

Abstract

PURPOSE: An apparatus and a method for controlling an electronic turbocharger are provided to achieve improved engine performance, while reducing parts count and manufacturing costs. CONSTITUTION: An apparatus comprises a compression turbine mounted in a housing which has an inlet port(51) formed at the front portion of the housing and an outlet port(52) connected to an intercooler(4) connected to a cylinder(3) through a pipe(2), wherein the compression turbine rotates in accordance with the frequency of rotation of a supercharger motor(7) and presses external air; a gear box(6) having an input gear(61) and an output gear(62) with different gear ratio, which reduces or amplifies the power generated from the supercharger motor and transmits the power to the compression turbine; the supercharger motor having a frequency of rotation determined in accordance with the signal output from a control unit; the control unit for determining the frequency of rotation of the charger motor so that an optimum engine performance is obtained, and outputting a driving signal to a motor control unit; and the motor control unit for supplying voltage corresponding to the signal output from the control unit, to the supercharger motor.

Description

Controlling Apparatus and Method of Electronic Turbochager of Internal Combustion Engine of Internal Combustion Engine

The present invention relates to an apparatus and method for controlling a turbocharger of an internal combustion engine, and more particularly, by removing a turbocharger currently used to make an exhaust system the same as a general engine and installing a motor pump for supercharging only on the intake side. The engine is invented to generate an optimum power through a method of controlling the intake air amount by a pump.

The turbocharger currently used is composed of a turbine 21, an air compressor 22, a center housing 23, and a west gate control actuator (not shown) on the same shaft 20 as shown in FIG. .

The turbocharger uses a discharge pressure of the exhaust gas to rotate a turbine mounted on the exhaust side, and transmits this rotational force to the intake side turbine to supercharge external fresh air into the engine cylinder.

In addition, recently, a method of installing a motor in the turbocharger or separating the intake and exhaust turbines has been developed. However, the basic concept of the basic turbocharger is to use the exhaust gas to supercharge the intake machine, which is the purpose of the turbocharger. To make it work.

However, until now, turbochargers in the exhaust turbine in the low-end region (for example, 1200-1800 RPM region) because the rotational force of the exhaust turbine is dependent on the exhaust pressure of the exhaust gas (that is, depending on the operating RPM of the engine). It is small and the intake side turbine of a turbocharger has the effect which interrupts a smooth suction, and there exists a problem which produces the turbo rack which runs short of an engine output.

In addition, since the exhaust system and the intake system operate in the same mechanism, the intake temperature increases due to the influence of the exhaust temperature, which is disadvantageous for the engine performance.In addition, when the layout of the engine room is selected, the intake / exhaust system becomes complicated or the layout of the advantageous layout is limited. I have a problem.

The present invention has been made to solve such a conventional problem, it is possible to improve the turbo rack as well as to reduce the back pressure of the exhaust system to improve the engine performance, improve the engine output in the low speed region and the sense of oscillation and It is possible to improve operability due to overtaking, not to be constrained by the simplification of the exhaust system and the intake and exhaust layout, and to reduce the number of parts through the simplification of some ducts of the intake and exhaust machine, and also to reduce the overall weight and production cost. In addition, it is an object of the present invention to provide a turbocharger control apparatus and method for an internal combustion engine that can greatly improve environmental friendliness.

An object of the present invention described above, the inlet is formed in the front of the inlet for the external air inlet is formed in the outer part of the housing formed in the exhaust port is connected to the intercooler through the tubular body to the number of revolutions of the motor delivered through the gearbox A compression turbine that rotates in response to pressurizes outside air; A gear box having input and output gears having different gear ratios and transmitting or reducing the power of the motor to a compression turbine; A supercharger motor whose rotation speed is determined in response to an output signal of the motor control unit; A controller configured to detect an engine speed, a vehicle speed, an axel opening amount, and an fuel injection amount to determine an engine speed of the supercharged motor to achieve an optimum engine performance; This can be achieved by configuring a motor control unit that controls the driving of the motor in response to the output signal of the controller.

Therefore, the turbo rack in the internal combustion engine can be improved, the back pressure of the exhaust system can be reduced, the engine performance can be improved, the engine output can be improved by improving the engine power in the low speed region, and the exhaust system is simplified. Through this, the number of parts can be reduced, overall weight and production cost can be reduced, and environmental friendliness can be greatly improved.

1 is a schematic configuration diagram of a conventional turbocharger.

2 is a schematic configuration diagram of a turbocharger in which the present invention is implemented.

3 is a block diagram of an apparatus of the present invention.

4 is a flowchart for explaining the method of the present invention.

Explanation of symbols on main parts of drawing

1: Compression turbine 2: Pipe

3: cylinder 4: intercooler

5 housing 6 gearbox

7: supercharge motor 7: supercharge motor

8: control unit 9: motor control unit

10: engine start detection unit 11: engine speed detection unit

12: vehicle speed detection unit 13: axel opening amount detection unit

14: fuel injection amount detection unit

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a schematic configuration diagram of a turbocharger in which the present invention is implemented, and Figure 3 shows a block configuration diagram of the apparatus of the present invention.

According to the present invention, the exhaust port 52 is connected to the intercooler 4 is connected to the cylinder 3 through the tubular body 2 is formed in the inlet port 51, the outside air inlet flows in the front portion Compression turbine (1) is installed in the housing (5) is formed is rotated in response to the rotational speed of the boosting motor (7) transmitted through the gear box (6) to pressurize the outside air;

A gear box (6) having input and output gears (61) and (62) having different gear ratios and decelerating or amplifying the power generated from the boosting motor (7) and transferring the power to the compression turbine (1);

A boost motor 7 for driving a compressed turbine, the rotation speed of which is determined in response to an output signal of the controller 8;

When it is detected that the engine is started by the output signal of the engine start detection unit 10, the engine speed detection unit 11, the vehicle speed detection unit 12, the accelerator opening amount detection unit 13 and the fuel injection amount detection unit 14, respectively After detecting the engine speed, vehicle speed, axel opening amount, and fuel injection amount, a predetermined program is executed to determine the motor speed control maps, and then the rotation speed of the supercharger motor 7 is determined so that the optimum engine performance is exhibited. A control unit 8 for outputting a drive signal to the control unit;

The motor control unit 9 supplies a voltage corresponding to the output signal of the control unit 8 to the boosting motor 7.

4 shows a flowchart for explaining the method of the present invention.

According to the method of the present invention, the control unit 8 continuously receives the output signal of the engine start detection unit 10 and detects whether the engine is started and drives the supercharge motor 7 when the engine is not started. Blocking the;

If the engine is detected to have started, the power is applied to the motor control unit 9, and then the current engine speed N1 is less than or equal to the idle speed Idle rpm. If the same, controlling the rotation speed N2 of the boost motor 7 to an idling speed so as to be charged at the time of engine idling operation;

Detecting whether the vehicle speed VS is "0" if the rotation speed N1 of the current engine is not less than or equal to the idle speed Idle rpm;

As a result of the detection as described above, when the vehicle speed VS is "0", the engine speed is changed while the vehicle is stopped, so that the rotation speed of the turbomotor 7 is dependent on the engine speed N1 of the engine. Performing (N2_Map_N1);

If the vehicle speed VS is not “0”, the vehicle is in a driving state. Therefore, the motor rotation speed control is a three-dimensional map such that the number of revolutions of the turbomotor 7 depends on the accelerator opening amount TPS and the fuel injection amount Ti. And implementing map 2 (N2_Map_TPS_Ti).

Referring to the effect of the present invention made of such a configuration and steps in detail as follows.

First, the present invention is equipped with a boost motor (7) which is a separate mechanism for the control of the intake air in the intake machine of the smoke engine, and by controlling the boost motor (7) the engine has excellent output performance compared to normal or current TCI engine With this mechanism, the turborack shape, which is a problem of the current TCI engine, can also be improved.

That is, the housing 5 is formed with an inlet port 51 through which the outside air flows in the front part, and an exhaust port 52 connected to the intercooler 4 connected to the cylinder 3 through the tubular body 2. Compression turbine (1) is installed in the inside, and the compression turbine (1) is connected to the above-mentioned boosting motor (7), but has a different gear ratio between the compression turbine (1) and the boosting motor (7) The gearbox 6 having the input and output gears 61 and 62 is installed to have a mechanical configuration such that the power generated by the supercharged motor 7 is decelerated or amplified in the gearbox 6.

In addition, a motor control unit 9 is connected to the power supply terminal of the boosting motor 7, and the motor control unit 9 detects the engine speed, vehicle speed, accelerator opening amount and fuel injection amount, and then selects a predetermined program. The controller 8 is connected to determine the motor speed control maps to perform the optimum engine performance.

On the other hand, the controller 8 continuously receives the output signal of the engine start detection unit 10 during normal operation and detects whether the engine is started. If the engine is not started, no output signal is output to the motor control unit 9. It does not send out to keep the drive of the supercharged motor (7) is blocked.

However, when the elapsed engine detected by the controller 8 is started, the power is supplied to the motor control unit 9 once, and then the output signal of the engine speed detector 11 is input to receive the current engine speed. It is detected whether N1 is less than or equal to the idle speed Idle rpm.

As a result, if the rotational speed N1 of the current engine is less than or equal to the idling rotational speed, the rotational speed N2 of the boosting motor 7 is controlled to the idling rotational speed so that the supercharged amount at the time of engine idle operation.

On the other hand, if the engine speed N1 of the current engine is not less than or equal to the idle speed Idle rpm, the output signal of the vehicle speed detector 12 is input to detect whether the vehicle speed VS is "0". If the vehicle speed VS is "0", the engine speed is changed in the stopped state of the vehicle, so the controller 8 rotates the number of revolutions of the supercharged motor 7 in the motor control unit 9. The control signal determined by the motor rotation speed control map 1 (N2_Map_N1) to be subordinated to N1 is output.

In addition, at this time, the optimum amount of charge air is tuned to minimize the generation of graphite.

However, if the vehicle speed VS is not "0", the motor rotation speed is determined by the accelerator opening amount TPS and the fuel injection amount Ti so as to ensure optimum driving performance while the vehicle is running. The rotation speed of the boost motor 7 is controlled by the control map 2 (N2_Map_TPS_Ti).

That is, when the vehicle speed VS is not “0”, the vehicle is in a driving state, and as a result, the output signals of the accelerator opening amount detection unit 13 and the fuel injection amount detection unit 14 are received. As a result, the supercharged motor rotation speed is tuned according to the accelerator opening amount (TPS) and the fuel injection amount (Ti) to achieve the optimum driving performance for each engine.

In this way, the controller 8 determines in which section of the stop-full load region the current engine operating state is operated, which means that the engine speed (rpm), vehicle speed (VS), and axel opening amount ( TPS) and the fuel injection amount Ti are determined and then the rotation speed of the supercharge motor 7 is controlled so that the tuning is automatically performed to develop optimum engine performance.

As described above, according to the present invention, by removing the turbocharger currently used, the exhaust system is made the same as a general engine, and only the intake side is equipped with a pump-type motor for supercharging, thereby controlling the intake air amount. In addition, it is possible to improve the turbo rack, as well as improve the engine performance by reducing the back pressure of the exhaust system, and improve the engine output in the low speed range, thereby improving the operability according to the feeling of starting and overtaking. In addition to simplifying the exhaust system and not being constrained by the intake and exhaust layout, it is possible to simplify some ducts of the intake and exhaust system, thereby reducing the number of parts, and reducing the overall weight and production cost, while greatly improving environmental friendliness. It can be.

Claims (2)

The front part of the housing 5 is formed with an inlet port 51 through which the outside air flows and an exhaust port 52 connected to the intercooler 4 connected to the cylinder 3 through the tubular body 2. A compression turbine (1) installed inside to rotate in response to the rotational speed of the boosting motor (7) transmitted through the gearbox (6) to pressurize the outside air; A gear box (6) having input and output gears (61) and (62) having different gear ratios and decelerating or amplifying the power generated from the boosting motor (7) and transferring the power to the compression turbine (1); A boost motor 7 for driving a compressed turbine, the rotation speed of which is determined in response to an output signal of the controller 8; When it is detected that the engine is started by the output signal of the engine start detection unit 10, the engine speed detection unit 11, the vehicle speed detection unit 12, the accelerator opening amount detection unit 13 and the fuel injection amount detection unit 14, respectively After detecting the engine speed, vehicle speed, axel opening amount, and fuel injection amount, a predetermined program is executed to determine the motor speed control maps, and then the rotation speed of the supercharger motor 7 is determined so that the optimum engine performance is exhibited. A control unit 8 for outputting a drive signal to the control unit; And a motor control unit (9) for supplying a boosting motor (7) with a voltage corresponding to the output signal of the control section (8). The control unit 8 continuously receives the output signal of the engine start detection unit 10 and detects whether the engine is started, and blocks the driving of the supercharge motor 7 if the engine is not started; If the engine is detected to have started, the power is applied to the motor control unit 9, and then the current engine speed N1 is less than or equal to the idle speed Idle rpm. If the same, controlling the rotation speed N2 of the boost motor 7 to an idle speed so as to be charged at the time of engine idle operation; Detecting whether the vehicle speed VS is "0" if the rotation speed N1 of the current engine is not less than or equal to the idle speed Idle rpm; As a result of the detection as described above, when the vehicle speed VS is "0", the engine speed is changed while the vehicle is stopped, so that the rotation speed of the turbomotor 7 is dependent on the engine speed N1 of the engine. Performing (N2_Map_N1); If the vehicle speed VS is not “0”, the vehicle is in a driving state. Therefore, the motor rotation speed control is a three-dimensional map such that the number of revolutions of the turbomotor 7 depends on the accelerator opening amount TPS and the fuel injection amount Ti. Implementing map 2 (N2_Map_TPS_Ti); Electronic turbocharger control method for an internal combustion engine, characterized in that consisting of.