KR20020087761A - Low-temperature ignition improvement and its method for turbo vehicle - Google Patents

Abstract

PURPOSE: A starting improvement apparatus of a turbo vehicle at low temperature and a method thereof are provided to enhance starting of an engine by automatically starting the vehicle with bypassing suction air in lowering temperature of coolant during parking the turbo vehicle. CONSTITUTION: A starting improvement device of a turbo vehicle at low temperature is composed of an engine RPM(Revolution Per Minute) detecting unit(2) detecting engine RPM; a rectifying unit(3) rectifying alternating current to direct current corresponding to engine RPM; an engine signal converting unit(4) converting voltage from the rectifying unit into a digital signal; a temperature sensor(7) detecting temperature of coolant; a temperature signal converting unit(8) outputting on-and-off signals; a control unit(9) outputting a driving signal or a shutoff signal to a damper motor driving unit(6) and a relay driving unit(10); the damper motor driving unit actuating a damper motor(5); and the relay driving unit driving ignition and start motor driving relays corresponding to the output signal from the control unit. Starting is improved by automatically starting the engine with bypassing suction air in lowering temperature of coolant.

Description

Low-temperature ignition improvement and its method for turbo vehicle

The present invention relates to an apparatus for improving the low temperature startability of a turbo vehicle, and more particularly, to a state in which the intake air is bypassed without passing through an intercooler when the temperature of the outside air falls below a cryogenic limit temperature while the turbo vehicle is parked. In order to improve the startability by starting the engine of the turbo vehicle automatically and start it automatically after the coolant temperature rises above a certain temperature. It is invented to prevent the occurrence of the phenomenon in advance, and to reduce the environmental pollution by reducing the exhaust gas by preventing the generation of white smoke at the initial start-up.

In general, diesel fuel, which is a fuel used in diesel engines, has a paraffin wax component in liquid fuel when freezing temperature is lowered to about -15 ° C or lower during winter due to the characteristics of fuel (freezing). In the case of engine oil, the viscosity decreases significantly, and the viscosity decreases when the temperature decreases. In the case of low temperature, the output voltage of the battery drops, and the output voltage of the generator varies depending on the type of vehicle.

However, the conventional turbo vehicle is not equipped with any device for improving the startability at low temperatures, so most drivers are preparing for the extent to cover the thermal insulation cover to the turbo vehicle in winter.

However, even if the turbo vehicle is covered with a heat insulating cover as described above, if the outside temperature drops below 15 degrees below zero, the degree due to the above-mentioned causes is sharply deepened and the startability is extremely bad or the starting is not performed at all. have.

On the other hand, if the start of driving after starting the diesel engine in the state in which the paraffin wax component is precipitated in diesel, as the wax component precipitated in the fuel is sucked into the engine, the filter filter in the fuel filter As a result, the amount of fuel actually supplied is very low compared to the required amount of raw materials required by the engine, resulting in engine starting failure of the diesel vehicle, starting off during driving, and excessive white smoke (that is, in a turbo vehicle). A large amount of white smoke is generated by the cooling of the intake air by the intercooler.

In addition, since the output voltage of the generator differs depending on the vehicle type, it may occur due to a malfunction in determining the starting state.

The present invention has been made to solve such a conventional problem, the outside temperature or the temperature of the coolant is lowered below a predetermined temperature (for example -15 ℃) while the engine of the turbo vehicle is turned off and parked in a predetermined place When the intake air is bypassed without passing through the intercooler, the engine is automatically started so that the temperature of the coolant is increased, but when the temperature of the coolant rises above a predetermined temperature, the start is automatically turned off. In addition to improving the startability of diesel engines at night and at dawn when the temperature drops to extremely low temperatures, the low-temperature startability of turbo-powered vehicles can greatly improve the environmental pollution caused by starting off during driving, acceleration delay, and large emissions of white smoke. It is an object of the present invention to provide an apparatus and a method thereof.

An object of the present invention described above, the engine speed detection unit is installed on one side of the engine rotation shaft for detecting the engine speed by an electrical signal; A rectifier for half-wave rectifying the AC voltage corresponding to the engine speed inputted through the engine speed detector into a DC voltage; An engine signal converter converting the output voltage of the rectifier into a digital signal for the controller to recognize the engine speed as the engine speed; A temperature sensor that detects a temperature of the coolant that cools the engine as an electrical signal; A temperature signal converter configured to generate an on or off signal in response to an output signal of the temperature sensor; A controller which receives the output signals of the signal converters and executes a predetermined program and selectively generates driving signals or blocking signals in the damper motor driver and the relay driver in response to the results; A tamper motor driver for selectively driving a damper motor installed on an intercooler auxiliary passage in response to an output signal of the controller; In response to the output signal of the controller, the relay driver is configured to selectively drive the ignition 1 and 2 and the start motor driving relay to park the turbo vehicle and turn off the engine. 15 ℃) can be achieved by automatically starting the engine in a state in which the intake air is bypassed without passing through the intercooler, and then turning off the engine automatically when the temperature of the coolant rises above a predetermined temperature.

Therefore, when the temperature of the outdoor air falls to a very low temperature in winter, when the temperature of the coolant drops below a predetermined temperature, the engine of the turbo vehicle is automatically started while the intake air is bypassed without passing through the intercooler. As a result, the startability of the diesel engine is improved, and when starting the engine of a turbo vehicle in the future, it is possible to prevent starting failure due to the cooling of the fuel in advance, as well as the phenomenon that the starting is turned off or the acceleration is delayed while driving. It is possible to prevent the occurrence of.

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

Figure 2 is an engine and intake vent opening diagram of the turbo vehicle according to the present invention.

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

Explanation of symbols on main parts of drawing

1: engine rotation shaft 2: engine speed detection unit

3: rectifier 4: engine signal converter

5: damper motor 6: damper motor drive unit

7: temperature sensor 8: temperature signal converter

9 control unit 10 relay driving unit

11: damper 12: engine

13: intake pipe 14: preheating plug

15: exhaust pipe 16: muffler

17: Air cleaner 18: Intercooler

19: auxiliary passage 20: turbocharger

IG1, IG2, START: Relay for ignition 1, 2 and start motor

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

1 shows a block diagram of an apparatus of the present invention.

According to this, the engine speed detection unit (2) installed on one side of the engine rotation shaft (1) for detecting the engine speed by an electrical signal;

A rectifier 3 for half-wave rectifying the AC voltage corresponding to the engine speed input through the engine speed detector 2 into a DC voltage;

An engine signal converter (4) for converting the output voltage of the rectifier (3) into a digital signal so that the controller (9) can recognize the engine speed;

A temperature sensor 7 which detects the temperature of the coolant for cooling the engine as an electrical signal;

A temperature signal converter (8) for generating an on or off signal in response to an output signal of the temperature sensor (7);

After receiving the output signal of each of the engine and temperature signal converters 4 and 8 and executing a predetermined program, the damper motor driver 6 and the relay driver 10 transmit a drive signal or a shutoff signal in response to the result. A controller 9 selectively generated;

A damper motor driver (6) for selectively driving damper motors (5) provided at both ends of the auxiliary passage (19) installed so as to bypass the intercooler (18) in response to the output signal of the controller (9);

The relay driver 10 may be configured to selectively drive the ignition 1 and 2 and the start motor driving relays IG1, IG2 and START in response to the output signal of the controller 9.

Figure 2 shows the engine and the intake and exhaust opening diagram of the turbocar according to the present invention, the preheating plug 14 is provided on the air inlet side of the engine 12 connected to the intake pipe 13, the engine 12 of the The turbocharger 20 installed in the exhaust pipe 15 is connected to the air cleaner 17 of the muffler 16, but the air cleaner 17 for filtering various foreign substances contained in the outside air is provided through the intercooler 18. And an auxiliary passage 19 in parallel with the intercooler 18 on the intake pipe 13 and the air intake side, and suction air is provided at both ends of the auxiliary passage 19 in the intercooler 18. Or a damper motor 5 for operating the damper together with the damper 11 to be introduced into the auxiliary passage 19, respectively.

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

According to this, the controller 9 receives the output signal of the engine speed detector 2 through the rectifier 3 and the engine signal converter 4, and the engine speed is " 0 " Detecting a status);

As a result of the above detection, if the engine speed is "0", the output signal of the temperature sensor 7 is inputted from the temperature signal converting section 8 to continuously check whether the temperature of the coolant drops below a predetermined temperature (X ° C). Detecting;

As a result of the above detection, if the temperature of the cooling water is lowered below the predetermined temperature (X ° C), the damper motor 5 on the auxiliary passage 19 installed in parallel with the enter cooler 18 is driven to allow the intake air to enter the enter cooler 18. Making a bypass to the auxiliary passage (19) without passing through and generating an 'on' signal from the temperature signal converter (8) to the controller (9);

Outputting a start motor driving relay (START) driving signal from the control unit 9 to the relay driving unit 10 when the 'on' signal is generated in the temperature signal converting unit 8;

Detecting whether the rotation speed is greater than a predetermined rotation speed (Z rpm) after outputting a signal for driving the start motor driving relay (START) as described above to confirm that the engine is completely started;

As a result of the above detection, if the engine speed rises above the predetermined rotation speed (Z rpm), the ignition 1 and 2 driving relays (IG1, IG2) are operated until the temperature of the cooling water rises above the predetermined temperature (Y ° C). Driving the process;

As described above, when the temperature of the coolant is continuously detected while the engine is started, when the temperature of the coolant rises above the predetermined temperature (Y ° C.), the temperature signal converter 8 turns off the control unit 9. Generating a signal;

The control unit 9 which receives the 'off' signal from the temperature signal converter 8 reversely rotates the damper motor 5 on the auxiliary passage 19 so that the intake air flows into the intercooler 18 and relay drive unit. Characterized in that consisting of; process to block the driving of the ignition 1, 2 and the start motor driving relay (IG1, IG2, START) through the (10) and return to the initial process.

Referring to the operation and effect of the device and method of the present invention made of such a configuration and process in detail as follows.

First, in the control unit 9 which performs various electronic controls on the turbo vehicle rotating parts through a predetermined program, the output signal of the engine speed detection unit 2 is input through the rectifying unit 3 and the engine signal conversion unit 4. In response to this, it is detected whether the engine speed is "0", that is, whether the engine is turned off.

As a result of the detection, the engine speed is "0" because the start of the turbo vehicle is turned off. Therefore, the controller 9 determines the temperature of the coolant through the temperature signal converter 8 and the temperature sensor 7.

That is, the temperature of the cooling water continues to be detected by the temperature signal converting section 8 that receives the output signal of the temperature sensor 7 to fall below a predetermined temperature (X ° C, for example, -15 ° C).

As a result, when the coolant temperature of the engine falls below a predetermined temperature (X ° C.), the control unit 9 normally installs an auxiliary passage parallel to the enter cooler 18 so that suction air flows into the intercooler 18. The damper motor 5 is driven in the forward direction to transfer the damper 11 which is blocking 19 so that the suction air is bypassed to the auxiliary passage 19 without passing through the enter cooler 18.

Since the temperature signal converter 8 generates an 'on' signal to the controller 9, the controller 9 outputs a driving signal corresponding to the 'on' signal to the relay driver 10. Therefore, the relay driving unit 10 drives the start motor driving relay START to start the engine so that the engine is automatically started.

Thereafter, the controller 9 receives the output signal of the engine speed detector 2 through the rectifier 3 and the engine signal converter 4 to check whether the engine is started. It detects whether it is over a certain speed (for example, 5000 rpm). If the engine speed is less than a certain speed (5000 rpm), it recognizes that the engine is not started and drives the starter motor. Let's go.

However, as a result of the above detection, if the engine speed has risen above a certain speed (5000 rpm), it is recognized that the engine is automatically started, and the ignition 1 and 2 driving relays (IG1, IG2) are driven. The process of comparing the temperature of the cooling water detected by the temperature sensor 7 with the predetermined temperature (Y ° C; for example, 50 ° C) is repeated.

Since the state in which the engine is started is maintained for a predetermined time as described above, when the temperature of the cooling water rises above the predetermined temperature (Y ° C.), the temperature signal converting part 8 sends an 'off' signal to the controller 9. Since the control unit 9 generates the damper motor 5 by rotating the damper motor 5 reversely so that the damper 11 blocking the side of the intercooler 18 through the damper motor driver 6 can block the auxiliary passage 19. The air flows into the intercooler 18, and at the same time, the driving of the ignition 1 and 2 and the start motor driving relays IG1, IG2, and START through the relay driver 10 is returned to the initial process.

This series of control processes is repeated whenever the engine is turned off while the turbo vehicle is parked and the coolant temperature drops below a predetermined temperature (eg -15 ° C). Even if the driver's intention is started every time, the coolant temperature is automatically raised so that the engine's startability can be greatly improved. When starting the engine of the turbo vehicle in the future, it is possible to prevent starting failure due to fuel cooling. Of course, it is possible to prevent the phenomenon that the start-up or the acceleration is delayed while driving and a large amount of white smoke itself.

As described above, according to the present invention, when the temperature of the outside air falls to a very low temperature in winter, when the temperature of the coolant drops below a predetermined temperature, the engine is started while the intake air of the turbo vehicle is bypassed without passing through the intercooler. By automatically hanging the temperature of the coolant, the temperature of the coolant is automatically raised, so that the startability of the diesel engine can be improved, and when starting the engine of a turbo vehicle in the future, the starting failure due to the cooling of fuel can be prevented in advance. It is possible to prevent the engine from turning off or delaying acceleration, thereby significantly improving the running and acceleration of the diesel turbo vehicle, and also preventing the occurrence of excessive white smoke, which may occur early in the engine. It can greatly reduce environmental pollution.

Claims (2)

An engine rotation speed detection unit (2) installed at one side of the engine rotation shaft (1) to detect the rotation speed of the engine as an electrical signal; A rectifier 3 for half-wave rectifying the AC voltage corresponding to the engine speed input through the engine speed detector 2 into a DC voltage; An engine signal converter (4) for converting the output voltage of the rectifier (3) into a digital signal so that the controller (9) can recognize the engine speed; A temperature sensor 7 which detects the temperature of the coolant for cooling the engine as an electrical signal; A temperature signal converter (8) for generating an on or off signal in response to an output signal of the temperature sensor (7); After receiving the output signal of each of the engine and temperature signal converters 4 and 8 and executing a predetermined program, the damper motor driver 6 and the relay driver 10 transmit a drive signal or a shutoff signal in response to the result. A controller 9 selectively generated; A damper motor driver (6) for selectively driving damper motors (5) provided at both ends of the auxiliary passage (19) installed so as to bypass the intercooler (18) in response to the output signal of the controller (9); Low temperature startability of the turbo vehicle, comprising a relay driver 10 for selectively driving the ignition 1, 2 and the start motor driving relays IG1, IG2, START in response to the output signal of the controller 9. Enhancement device. The controller 9 receives the output signal of the engine speed detector 2 through the rectifier 3 and the engine signal converter 4 to determine whether the engine speed is "0" (that is, the engine is turned off). Detecting; As a result of the above detection, if the engine speed is "0", the output signal of the temperature sensor 7 is inputted from the temperature signal converting section 8 to continuously check whether the temperature of the coolant drops below a predetermined temperature (X ° C). Detecting; As a result of the above detection, if the temperature of the cooling water is lowered below the predetermined temperature (X ° C), the damper motor 5 on the auxiliary passage 19 installed in parallel with the enter cooler 18 is driven to allow the intake air to enter the enter cooler 18. Making a bypass to the auxiliary passage (19) without passing through and generating an 'on' signal from the temperature signal converter (8) to the controller (9); Outputting a start motor driving relay (START) driving signal from the control unit 9 to the relay driving unit 10 when the 'on' signal is generated in the temperature signal converting unit 8; Detecting whether the rotation speed is greater than a predetermined rotation speed (Z rpm) after outputting a signal for driving the start motor driving relay (START) as described above to confirm that the engine is completely started; As a result of the above detection, if the engine speed rises above the predetermined rotation speed (Z rpm), the ignition 1 and 2 driving relays (IG1, IG2) are operated until the temperature of the cooling water rises above the predetermined temperature (Y ° C). Driving the process; As described above, when the temperature of the coolant is continuously detected while the engine is started, when the temperature of the coolant rises above the predetermined temperature (Y ° C.), the temperature signal converter 8 turns off the control unit 9. Generating a signal; The control unit 9 which receives the 'off' signal from the temperature signal converter 8 reversely rotates the damper motor 5 on the auxiliary passage 19 so that the intake air flows into the intercooler 18 and relay drive unit. (10) a step of blocking the driving of the ignition 1 and 2 and the start motor driving relays (IG1, IG2, START) and returning to the initial process;