KR20020043708A - Pressure booster system and store/output method thereof - Google Patents

Abstract

PURPOSE: An accumulative booster system for preventing turbo lag and a method for charging and emitting of an accumulative booster system are provided to improve the starting acceleration performance of a vehicle by preventing turbo lag in the vehicle employing a turbo-charger engine. CONSTITUTION: A boost pressure sensor senses the internal pressure of a plenum chamber. An intake throttle valve(9) is installed at the inlet of the plenum chamber. A throttle position sensor senses the opening state of the intake throttle valve. A vehicle speed sensor senses the speed of a vehicle. An engine control unit controls respective parts of a system to prevent the turbo lag of a turbo-intercooler diesel engine depending on the signals sensed by the sensors. First and second solenoid valves are driven to adjust the opening angle of the intake throttle valve depending on the control of the engine control unit. An accumulative vessel(70) is connected with the plenum chamber via a hose(100) to store or emit high-pressure air. An accumulative valve(80) is installed in the hose to supply the high-pressure air to the plenum chamber from the accumulative vessel.

Description

Pressure booster system and store / output method for preventing turbo rack

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbocharger engine of a vehicle. In particular, a turborack prevention accumulator booster for improving a vehicle's oscillation acceleration performance by preventing a turbo rack phenomenon generated when a vehicle applying a turbocharger engine through an accumulator booster is generated. It relates to a system and a method of filling and discharging thereof.

As shown in FIG. 1, a conventional turbo intercooler diesel engine uses a turbocharger composed of a turbine 1 and a compressor 2 to increase the amount of intake air to improve output.

That is, the exhaust gas passes through the turbine 1 through the exhaust pipe 3 to supply energy to the turbine 1, and the turbine 1 is connected to the compressor 2 connected by the shaft 4. The same energy is transferred to the rotational energy.

At this time, the compressor (2) compresses the intake air and sends it to the intake manifold (7) through the intercooler (5) and the plenum chamber (6), so that the intake air has a higher density than the natural intake engine It is supplied to the furnace engine 8.

However, the conventional turbocharged engine has a phenomenon that the output is temporarily reduced due to the insufficient amount of intake air due to the turbo rack phenomenon when the vehicle starts, in particular, the turbo rack phenomenon is severe when climbing the ramp on the ramp to reduce the output of the engine and It has a problem of causing a large amount of soot emission.

In other words, when the load or rotational speed of the engine changes drastically, only a part of the energy transmitted to the turbine 1 is transmitted to the compressor 2, and the rest is used to accelerate the rotating parts after the turbocharger inertia is overcome. In other words, the boost pressure supplied when the engine accelerates or the load increases is accompanied by a closed end that maintains a lower level than the steady state for the same instantaneous rotational speed and fuel quantity.

Therefore, the amount of intake air from the above closed end is insufficient compared to the amount of air supplied to the injection fuel amount, which causes combustion performance of the engine to be lowered, causing smoke and instantaneous torque shortage. .

That is, in the related art, the compressor 2 does not supply the intake air quickly enough due to the inertia of the turbocharger. Thus, the turbo rack phenomenon has a large difference in fuel amount between no-load and full-load fuel during engine rotation of only a few cycles. The higher horsepower engine has a problem that is more severely generated.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, an object of the present invention, a pressure accumulator for storing high-pressure air, a hose connecting the accumulator vessel and the plenum chamber, the connection portion is mounted Accumulated pressure including a pressure storage valve, an intake throttle valve mounted at the plenum chamber inlet, a solenoid valve and a vacuum pump for driving these two valves, and an engine control unit for driving them, a boost pressure sensor, a vehicle speed sensor, and a throttle opening sensor. It is to provide a turbo rack preventive pressure booster system and a method of filling and discharging the turbo rack to prevent the turbo rack phenomenon generated when the vehicle to which the turbocharged engine is applied through the booster to improve the vehicle acceleration acceleration performance.

1 is a block diagram of a turbo intercooler diesel engine applied in the prior art.

Figure 2 is a diagram showing a state in which the pressure booster is mounted on the turbo intercooler diesel engine in one embodiment of the present invention.

Figure 3 is a block circuit diagram for controlling the pressure booster in one embodiment of the present invention.

Figure 4 is a flow chart showing a filling method of the accumulator container in one embodiment of the invention.

Figure 5 is a flow chart showing a method of pre-shrink the accumulator in one embodiment of the present invention.

※ Explanation of code for main part of drawing

One ; Turbine 2; Compressor

3; Exhaust pipe 4; shaft

5; Intercooler 6; Plenum chamber

7; Intake manifold 8; engine

9; Intake throttle valve 10; Boost pressure sensor

20; Throttle opening sensor 30; Vehicle speed sensor

40; Engine control unit 50; 1st solenoid valve

60; Second solenoid valve 70; Accumulator

80; Accumulation valve

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

2 is a configuration diagram showing a state where the accumulator booster is mounted on the turbo intercooler diesel engine according to an embodiment of the present invention, and FIG. 3 is a circuit diagram of controlling the accumulator booster according to an embodiment of the present invention.

As shown in Figs. 2 and 3, the turbine 1 includes a compressor 1, a compressor 2, an intercooler 5, a plenum chamber 6, and the like, to increase the intake air volume by using a turbocharger to improve the output. In the turbo intercooler diesel engine,

A boost pressure sensor (10) mounted at an inlet of the plenum chamber (6) to measure an internal pressure of the plenum chamber (6);

A stottle opening sensor 20 for detecting an opening state of the intake throttle valve 9 and a vehicle speed sensor 30 for detecting a vehicle speed;

An engine control unit (ECU) 40 for controlling each part of the system to prevent a turbo rack phenomenon of the turbo intercooler diesel engine according to a signal detected from each sensor 10, 20, 30;

A first solenoid valve 50 and a second solenoid valve 60 driven to adjust the opening angle of the intake throttle valve 9 according to the control of the engine control unit 40;

A accumulator vessel 70 connected to the plenum chamber 6 and the hose 100 to store or discharge the high pressure air;

Mounted inside the hose 100, the high pressure air stored in the pressure storage container 70 or the high pressure air stored in the pressure storage container 70 in accordance with the operation of the second solenoid valve 60 plenum chamber An accumulator valve 80 which opens and closes so as to supply it to (6); It is characterized by the configuration.

According to another aspect, a method of filling high pressure air into the pressure storage container 70 is shown in Figure 4,

Determining whether the accumulator vessel 70 is released as well as the boost pressure and the set pressure in the plenum chamber 6 detected by the boost sensor 10;

As a result of the determination, if the boost pressure is less than the set pressure, the operation of the timer is terminated, and if the boost pressure is greater than the set pressure and the pressure storage container 70 is released, the timer is operated and then the time and the set time of the operated timer are set. Comparing;

As a result of the comparison, when the operation time of the timer is greater than the set time, the pressure storage valve 80 is opened from the operation of the second solenoid valve 60 so that the pressure of the pressure storage container 70 is equal to the pressure of the plenum channel 6 Maintaining and checking the filling time;

If the filling time is greater than the set filling time from the step, closing the accumulator valve 80 to store the high pressure air in the accumulator vessel 70 and displaying it through the accumulator switch; It consists of

According to yet another aspect, the method of discharging the high pressure air stored in the pressure storage container 70, as shown in Figure 5,

Comparing the opening angle, vehicle speed, and setting angle of the intake throttle valve 9 detected by the throttle opening degree sensor 20 and the vehicle speed sensor 30 with the setting vehicle speed, respectively;

Comparing the opening angle and the set value of the intake throttle valve (9) after operating the timer if the opening angle and the vehicle speed of the intake throttle valve (9) are larger than the set value as a result of the comparison;

If the opening angle is smaller than the set value as a result of the comparison, determining whether the slope according to the time of the throttle opening degree is more rapid than the set slope by comparing the operation time and the set time of the terminated timer after the operation of the timer is finished;

As a result of the comparison, if the slope according to the time of the throttle opening is sharper than the set slope, it is determined that the turbo rack is generated and then the timer is operated to open the accumulator valve 80, and then close the intake throttle valve 9 to the accumulator vessel 70. Supplying the stored high pressure air to the plenum chamber 6;

When the high pressure air stored in the pressure storing vessel 70 is supplied to the plenum chamber 6 from the above step, the pressure storing valve 80 is closed again, the intake throttle valve 9 is opened, and then the pressure storing vessel 70 is released. Displaying through the pressure storage switch; Characterized in that made.

Here, the timer is an internal circuit diagram controlled by the engine control unit 40 and is not shown in the present invention.

In addition, the accumulator switch is a logic switch indicating filling and discharging of the accumulator container 70. When the accumulator switch displays "0", the accumulator container 70 is in a filled state, and when "1" is displayed, the accumulator container is displayed. Reference numeral 70 denotes the release state.

Referring to Figures 2 to 5 attached to the operation of an embodiment of the present invention configured as described above are as follows.

First, as the engine operates normally, the exhaust gas passes through the turbine 1 through the exhaust pipe 3 to supply energy to the turbine 1, and the turbine 1 is connected to the compressor 4 by the shaft 4. 2) to transfer the energy as a rotational energy.

Then, the compressor 2 compresses the intake air and sends it to the intake manifold 7 through the intercooler 5 and the plenum chamber 6, so that the intake air has a higher density than the natural intake engine. It is supplied to the furnace engine 8.

At this time, when the engine is normal, the boost pressure sensor 10 measures the internal pressure of the plenum chamber 6 and then outputs it to the engine control unit 40.

The engine control unit 40 drives the second solenoid valve 60 when the internal pressure of the plenum chamber 6 measured by the boost pressure sensor 10 rises to a set pressure (for example, 1.5 atm absolute pressure). The accumulator valve 80 in the hose 100 connected to the plenum chamber 6 is opened.

Then, the pressure of the plenum chamber 6 is introduced into the accumulator vessel 70 through the hose 100 from the opening of the accumulator valve 80, so that the pressure of the accumulator vessel 70 is the plenum channel ( It remains the same as the pressure of 6).

At this time, the engine control unit 40 checks the high-pressure air inlet time, that is, the filling time into the accumulator vessel 70, and if the filling time is greater than the set filling time, the pressure regulating valve 80 is the second solenoid valve ( While driving again 60, the high-pressure air is stored in the accumulator vessel 70, while it is displayed through the accumulator switch, which is a logic switch.

That is, when the pressure switch indicates "0", it indicates that the pressure storage container 70 is filled.

On the other hand, the engine control unit 40 is a signal detected from the throttle opening degree sensor 20 and the vehicle speed sensor 30, that is, the intake throttle valve detected from the throttle opening degree sensor 20 and the vehicle speed sensor 30 ( The opening angle and vehicle speed of 9) are compared with the set vehicle speed as well as the set angle.

As a result of the comparison, when the opening angle and the vehicle speed of the intake throttle valve 9 are greater than the set value, the engine control unit 40 compares the opening angle and the set value of the intake throttle valve 9 again after operating the timer.

At this time, when the opening angle is smaller than the set value, the engine control unit 40 compares the operation time and the set time of the finished timer after the end of the timer operation, the slope according to the time of the throttle opening degree than the set slope Determine if it is sudden.

When the slope according to the time of the throttle opening degree is more steep than the set slope, the engine control unit 40 determines that it is a turbo rack generating condition, operates the timer and drives the second solenoid valve 60 at the same time. The pressure accumulating valve 80 is opened while the first solenoid valve 50 is driven to close the intake throttle valve 9.

Then, the high-pressure air stored in the pressure storage vessel 70 from the closing of the intake throttle valve 9 and the opening of the pressure storage valve 80 is supplied to the plenum chamber 6 through the hose 100, thereby providing a turbo The intercooler's diesel engine is capable of normal combustion.

Meanwhile, the engine control unit 40 drives the first and second solenoid valves 50 and 60 again when the high pressure air stored in the pressure storage vessel 70 is supplied to the plenum chamber 6. After closing 80 and opening the intake throttle valve 9, a control operation of displaying the discharge state of the accumulator vessel 70 through the accumulator switch, which is a logic switch, is performed.

Here, when the accumulator switch displays "1", it indicates that the accumulator vessel 70 is in a discharged state.

As described above, the present invention provides an accumulator for storing high pressure air, a hose connecting the accumulator and the plenum chamber, a accumulator valve mounted at the connection portion, and an intake throttle valve mounted at the inlet of the plenum chamber. The turbo generated when the vehicle is applied to the turbocharger engine through the accumulator booster by including a solenoid valve driving a valve, a vacuum pump, and an engine control unit driving the valve, a boost pressure sensor, a vehicle speed sensor, and a throttle opening sensor. There is an effect of providing a turbo rack preventive pressure booster system and a method of filling and discharging thereof to prevent the rack phenomenon to improve the oscillation acceleration performance of the vehicle.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (3)

In a turbo intercooler diesel engine that uses a turbocharger to increase the amount of intake air to improve output, A boost pressure sensor mounted at an inlet of the plenum chamber to measure an internal pressure of the plenum chamber; A stottle opening sensor for detecting an opening state of the intake throttle valve, and a vehicle speed sensor for detecting a vehicle speed; An engine control unit for controlling each part of the system to prevent a turbo rack phenomenon of the turbo intercooler diesel engine according to a signal sensed by each sensor; A first solenoid valve and a second solenoid valve driven to adjust the opening angle of the intake throttle valve according to the control of the engine control unit; A accumulator vessel connected to the plenum chamber and a hose to store or discharge the high pressure air; A pressure storage valve mounted inside the hose, the pressure storage valve being opened and closed to store high pressure air in the pressure storage container or supply high pressure air stored in the pressure storage container to the plenum chamber according to the operation of the second solenoid valve; Turbo rack preventive pressure booster system, characterized in that consisting of. Determining whether the accumulator vessel is released as well as the boost pressure and the set pressure in the plenum chamber detected by the boost sensor; If the boost pressure is less than the set pressure, the operation of the timer is terminated, and if the boost pressure is greater than the set pressure and the accumulator is discharged, the timer is operated and then the time of the operated timer is compared with the set time. Wow; When the operation time of the timer is greater than the set time as a result of the comparison, opening the accumulator valve from the operation of the second solenoid valve to maintain the pressure of the accumulator vessel equal to the pressure of the plenum chamber and checking the filling time thereof; If the filling time is greater than the set filling time from the step, closing the accumulator valve and storing the high pressure air in the accumulator vessel and displaying it through the accumulator switch; Filling method of the accumulator booster for preventing the turbo rack, characterized in that proceeding to. Comparing the opening angle, the vehicle speed, and the setting angle of the intake throttle valve detected by the throttle opening degree sensor and the vehicle speed sensor with the setting vehicle speed, respectively; Comparing the opening angle and the set value of the intake throttle valve after operating the timer if the opening angle and the vehicle speed of the intake throttle valve are greater than the set value as a result of the comparison; If the opening angle is smaller than the set value as a result of the comparison, determining whether the slope according to the time of the throttle opening degree is more rapid than the set slope by comparing the operation time and the set time of the terminated timer after the operation of the timer is finished; As a result of the comparison, if the inclination of the throttle opening time is sharper than the set slope, it is determined that the turbo rack is generated and then the timer is operated to open the accumulator valve and then close the intake throttle valve to transfer the high-pressure air stored in the accumulator to the plenum chamber. Supplying; When the high pressure air stored in the accumulator vessel is supplied to the plenum chamber, closing the accumulator valve again, opening the intake throttle valve, and displaying the discharge state of the accumulator vessel through the accumulator switch; Discharge method of the turbo rack preventive pressure booster, characterized in that proceeding to.