KR20020087763A - Low-temperature ignition improvement and its method for turbo vehicle - Google Patents

Abstract

PURPOSE: A starting improvement apparatus of a vehicle at low temperature and a method thereof are provided to enhance starting of a diesel engine by automatically starting the vehicle in lowering temperature of coolant during parking the vehicle on the plane. CONSTITUTION: A starting improvement device of a 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; an inclination detecting sensor(5) detecting parking on the inclined road; an inclination signal converting unit(6) converting the analog signal from the inclination detecting sensor into the 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 relay driving unit(10); and the relay driving unit driving ignition and start motor driving relays corresponding to the output signal from the control unit. Traveling and acceleration are improved by enhancing starting with automatically starting the vehicle 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 low temperature startability of a vehicle and a method thereof, and more particularly, to start an engine of a vehicle automatically when the temperature of the outside air falls below a critical temperature that is extremely low in a state where the vehicle is parked in an unsloped place. In order to improve starting performance, it is possible to prevent the occurrence of starting off and acceleration delays while driving. Invented.

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.

By the way, the conventional diesel vehicle is not equipped with any device for improving the startability at low temperatures, most drivers are prepared for this extent to cover the thermal insulation cover to the car in winter.

However, even if the 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, so that the starting performance 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 from diesel, the filter element in the fuel filter passes through the fuel filter while the wax component precipitated in the fuel is sucked into the engine. Because of this, 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 diesel vehicles, starting off during driving, excessive white smoke, and inability to accelerate during driving. There is also a problem leading to the occurrence of.

The present invention has been made to solve such a conventional problem, the temperature of the outside air or the temperature of the cooling water in a state in which the car is parked in a place that is not inclined more than a predetermined angle (for example -15 ℃) When the temperature falls below, the engine is automatically started to increase the temperature of the coolant, but when the temperature of the coolant rises above a predetermined temperature, the engine is automatically turned off. It is an object of the present invention to provide an apparatus and method for improving the low temperature startability of a vehicle which can improve the off and driving delay and the acceleration delay phenomenon while driving.

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; An inclination state detection sensor fixed to a predetermined portion of the vehicle and detecting whether the vehicle is parked at an inclined position by an electric signal; An inclination signal converting unit converting the analog detection signal output from the inclination state detecting sensor into a digital signal that can be recognized by the control unit; 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 control unit which receives the output signals of the signal converters, executes a predetermined program, and generates a driving signal or a blocking signal in response to the result; In response to the output signal from the controller, the relay driver is configured to selectively drive the ignition 1 and 2 and the start motor driving relay to park the vehicle in a flat place and turn off the ignition while the cooling water is turned off at a predetermined temperature. It can be achieved by automatically starting the engine when the temperature falls below 15 ° C. and automatically turning off the engine when the coolant temperature rises above a predetermined temperature.

Therefore, only when the car is parked in a place where the car is not inclined, the temperature of the outside air drops to a very low temperature in winter, so when the temperature of the coolant drops below a predetermined temperature, the vehicle starts automatically and the temperature of the coolant is automatically raised. This improves the startability of diesel engines, which can prevent starting failures caused by the cooling of fuel when starting the engine of the car in the future, as well as preventing the engine from turning off while driving or delaying acceleration. It can be.

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

Figure 2a, 2b is an operating state diagram of the tilt detection sensor of the present invention device.

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: Tilt state detection sensor 6: Tilt signal conversion unit

7: temperature sensor 8: temperature signal converter

9 control unit 10 relay driving unit

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.

Figure 1 shows a block diagram of the device of the present invention, Figures 2a, 2b shows an operating state diagram of the inclination detection sensor of the device 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;

An inclination state detection sensor 5 fixedly installed at a predetermined portion of the vehicle and detecting whether the vehicle is parked in an inclined place by an electric signal;

An inclination signal converter (6) for converting the analog detection signal output from the inclination state detection sensor (5) into a digital signal that can be recognized by the controller (9);

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);

A controller 9 which receives the output signals of the signal converters 4, 6, and 8, executes a predetermined program, and generates a drive signal or a cutoff signal to the relay driver 10 in response to the result;

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.

At this time, the inclined state detection sensor 5 is filled with the liquid 53 so that the both ends are closed and the bubble 52 of a predetermined diameter is provided inside the cylindrical body 51 having a predetermined length and diameter, The light emitting element 54 and the light receiving element 55 are installed in the upper and lower portions of the center of the 51 to receive light generated from the light emitting element 54 according to the position of the bubble 52 moving in response to the inclination angle of the vehicle. ) Is configured to selectively receive.

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

According to this, the control unit 9 receives the output signal of the inclination state detection sensor 5 through the inclination signal converting unit 6 and detects whether the vehicle is parked in the inclined position;

As a result of the detection, when the vehicle is parked in a place where the vehicle is not inclined, the output signal of the engine speed detector 2 is input through the rectifier 3 and the engine signal converter 4, and the engine speed is " 0 ". Detecting whether the engine is in a state (i.e., the engine is turned off);

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;

Generating a 'on' signal from the temperature signal converter 8 to the controller 9 when the temperature of the coolant drops below a predetermined temperature (X ° C.) as a result of the detection;

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 receives the 'off' signal from the temperature signal converter 8 to drive the ignition 1 and 2 and the start motor driving relays IG1, IG2, and START through the relay driver 10. Blocking and returning to the initial process; characterized in that consisting of.

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, the control unit 9 which performs various electronic controls on the vehicle rotating parts through a predetermined program receives the output signal of the inclination state detection sensor 5 through the inclination signal converting unit 6 and the position at which the car is inclined. It will continue to detect if you are parked on the street.

That is, the light emitting element 54 is disposed at the upper and lower centers of the cylindrical body 51 in which the liquid 53 is filled so that both ends thereof are closed and bubbles 52 having a predetermined diameter are provided inside the cylindrical body 51 having a predetermined length and diameter. And the inclination detection sensor 5 provided with the light receiving element 55 to detect whether the vehicle is inclined. If the vehicle is located in a flat place, the bubble 52 is cylindrical as shown in FIG. 2A. Since it is located at the center of the 51, the light generated from the light emitting element 54 is blocked by the bubble 52 so that the light receiving element 55 is maintained in the "off" state, on the contrary, in a place inclined more than a predetermined angle When the vehicle is parked at the position, the bubble 52 is moved to one side from the center portion of the cylindrical body 51 as shown in FIG. 2B, so that the light generated from the light emitting element 54 is transferred to the transparent liquid in the cylindrical body 51 ( The light receiving element 55 is transmitted to the light receiving element 55 through 53). 55 is keeping the "on" state.

On the other hand, the control unit 9 detects the inclination state of the vehicle as described above, if the vehicle is parked in a non-sloped state and recognizes it, and outputs the output signal of the engine speed detection unit 2 and the rectifier 3 and It is input through the engine signal converter 4 to detect whether the engine speed is "0", that is, the engine is turned off.

As a result of the detection as described above, if the engine speed is “0” because the vehicle is turned off, 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 temperature signal converter 8 generates an 'on' signal to the controller 9, so that the controller 9 generates an 'on' signal. Since the corresponding driving signal is output to the relay driver 10, the relay driver 10 drives the start motor driving relay START to start the engine, and 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 as described above lasts for a predetermined time or more, when the temperature of the cooling water rises above the predetermined temperature (Y ° C.), the temperature signal converting unit 8 sends an 'off' signal to the control unit 9. Since the controller 9 stops the driving of the ignition 1 and 2 and the start motor driving relays IG1, IG2, and START through the relay driver 10, the controller 9 returns to the initial process.

This series of control process is repeated every time the temperature of the coolant drops below a predetermined temperature (eg -15 ℃) when the engine is turned off while the vehicle is parked in a flat position. Even if it goes down, regardless of the driver's intention, it starts every time and the coolant temperature automatically rises, which greatly improves the startability of the engine.It prevents the starting failure due to the cooling of fuel when the engine is started in the future. In addition, it is possible to prevent the phenomenon that the start-up or the acceleration is delayed while driving.

In the meantime, the present invention is implemented only when the vehicle is not inclined, so that when the vehicle is started while the actual vehicle is parked at an inclined position, the vehicle may move due to vibration caused by the engine driving. Because there is.

In other words, the car is parked in an inclined place, but the engine is started in an unmanned state to prevent a safety accident that may be caused by the movement of the car due to the vibration of the engine.

As described above, according to the present invention, 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 diesel vehicle is automatically started to raise the temperature of the coolant automatically. Therefore, it is possible to improve the startability of the diesel engine, so that when starting the engine of the car in the future, the starting failure due to the cooling of the fuel can be prevented in advance, as well as preventing the engine from starting off or delaying acceleration. As a result, the driving and acceleration of the diesel vehicle can be greatly improved.

Of course, when the temperature of the coolant drops below the predetermined temperature and automatically starts the engine of the diesel vehicle, the vehicle must be parked in a flat place or a place having a tilt angle of less than a predetermined angle. It is a very useful invention, such as to make it possible to prevent the occurrence of a safety accident in advance because the car is moving in an unattended state, so as to increase the reliability of the low temperature start-up improver itself.

Claims (3)

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; An inclination state detection sensor 5 fixedly installed at a predetermined portion of the vehicle and detecting whether the vehicle is parked in an inclined place by an electric signal; An inclination signal converter (6) for converting the analog detection signal output from the inclination state detection sensor (5) into a digital signal that can be recognized by the controller (9); 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); A controller 9 which receives the output signals of the signal converters 4, 6, and 8, executes a predetermined program, and generates a drive signal or a cutoff signal to the relay driver 10 in response to the result; Improving low temperature startability of the 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. Device. The method according to claim 1, The inclined state detecting sensor 5 fills the liquid 53 so that both ends thereof are closed and a bubble 52 having a predetermined diameter is provided inside the cylindrical body 51 having a predetermined length and diameter, and the cylindrical body 51 The upper and lower portions of the light emitting element 54 and the light receiving element 55 are installed at the center of the light receiving element 55 to emit light generated from the light emitting element 54 according to the position of the bubble 52 moving in response to the inclination angle of the vehicle. Low temperature start-up improving device for cars characterized in that configured to selectively receive. Detecting whether the vehicle is parked at an inclined position by receiving the output signal of the inclination state detection sensor 5 from the control unit 9 through the inclination signal converting unit 6; As a result of the detection, when the vehicle is parked in a place where the vehicle is not inclined, the output signal of the engine speed detector 2 is input through the rectifier 3 and the engine signal converter 4, and the engine speed is " 0 ". Detecting whether the engine is in a state (i.e., the engine is turned off); 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; Generating a 'on' signal from the temperature signal converter 8 to the controller 9 when the temperature of the coolant drops below a predetermined temperature (X ° C.) as a result of the detection; 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 receives the 'off' signal from the temperature signal converter 8 to drive the ignition 1 and 2 and the start motor driving relays IG1, IG2, and START through the relay driver 10. Blocking and returning to the initial process; low temperature start-up method of the vehicle, characterized in that consisting of.