KR100244746B1 - Device of controlling coolant circulation for reducing warming up on the engine cooling time - Google Patents

Abstract

The present invention controls the cooling water circulating in the water jacket of the engine when starting the engine of the car to reduce the warm-up time until the coolant rises to a constant temperature when the engine is started in the cooling state, A coolant circulation control device for reducing the warm-up time during engine cooling that improves the combustion efficiency of an engine and ultimately reduces the incidence of unburned hydrocarbons in the exhaust gas. The cylinder head communicates with the water jacket of the cylinder block of the engine. A thermostat mounted in front of the discharge path of the coolant circulating through the water jacket, a throttle body and a heater for circulating the coolant through a supply line communicating with the coolant discharge path, and cooling the coolant by opening the thermostat And a water pump for pumping circulation of cooling water to the water jacket of the cylinder block. In the configured coolant circulation device, a thermocouple for sensing the coolant temperature around the combustion chamber in proximity to any one of the combustion chamber in the cylinder head, and receives the input signal of the thermocouple is mounted to the coolant discharge port to the water jacket of the engine A butterfly valve for controlling the discharged cooling water and a bypass line connected between the cooling water discharge port and the pumping circulation line of the water pump, and an excessive temperature change of the cooling water discharged at the opening of the butterfly valve mounted on the bypass line. It characterized in that it consists of a discharge coolant temperature control valve for bypassing the cooling water pumped into the pumping circulation line to the outlet to control the.

Description

Coolant circulation control device to reduce the warm-up time during engine cooling

1 is a schematic diagram of a cooling water circulation system for explaining the present invention.

2 is an excerpt of the main portion of the present invention.

<Explanation of symbols for main parts of drawing>

1: engine 2: cylinder block

3: cylinder head 4: cooling water outlet

5: combustion chamber 6: water pump

7: Throttle Valve 8: Heater

9,12: circulation line 10: thermostat

11: radiator 13,14: recovery line

20: thermocouple 21: butterfly valve

22: bypass line 23: exhaust coolant temperature control valve

24: electronic circuit

[Industrial use]

The present invention controls the coolant circulating in the water jacket of the engine when the engine of the vehicle is started, and reduces the warm-up time until the coolant rises to a constant temperature when the engine is started in the cooling state. The present invention relates to a cooling water circulation control device for shortening the warm worm time during engine cooling by improving the combustion efficiency of the engine and ultimately reducing the incidence of unburned hydrocarbons in the exhaust gas.

[Private Technology]

In general, automobile engines have adopted a method of circulating coolant in the water jacket of the cylinder block to prevent the engine from overheating.

The conventional cooling water circulator for preventing overheating of an engine includes a cooling water circulation line for cooling the engine while circulating around the engine, and a thermostat for opening a passage to circulate when the cooling water of the circulation line rises above a set temperature. Thermostat), a supply line and circulation line for supplying and circulating cooling water to a radiator during the opening operation of the thermostat, a water pump and pumping line for circulating the cooling water to a water jacket, and a circulation line of the engine It consists of a throttle body and a heater to which the cooling water of which temperature rises is supplied.

[Problems with Prior Art]

However, the conventional cooling water circulator configured as described above starts to circulate the cooling water present in the water jacket of the engine when the engine is started in the cooling state and the water pump is operated. Since the coolant is circulated at a low temperature, the engine is operated at a low temperature at the start of the engine, and thus combustion efficiency is lowered. Also, the coolant of the low temperature is supplied to the combustion chamber of the engine as the coolant circulates through the throttle body. The supplied air is also supplied at a low temperature to reduce the combustion efficiency. As a result, the combustion efficiency of the fuel decreases during the time from the start of the engine to the set temperature, that is, during the warm-up time, thereby lowering the engine output performance and fuel efficiency. There was a problem that a lot of unburned hydrocarbons are emitted.

[Problem to Solve Invention]

The present invention has been made to solve the above problems, the present invention is installed in the vicinity of the combustion chamber of the engine cylinder head of the thermocouple (Thermocouple) to sense the coolant temperature around the combustion chamber, and the cooling water around the engine Proportional control device consisting of a butterfly valve (Butterfly Valve) for controlling the flow rate and an electronic circuit for controlling the butterfly valve in response to the temperature detection signal of the thermocouple is mounted on the discharge path for discharging the coolant to each device installed in the When the engine is started during cooling, the cooling water stored in the water jacket is controlled so that the cooling water can be quickly heated to the set temperature, thereby reducing the engine warm-up time. Furthermore, the combustion chamber of the engine Heats up quickly and improves combustion efficiency of fuel, The air supplied to the combustion chamber is also preheated within a short time to maximize the combustion efficiency. The ultimate object of the present invention is to reduce the amount of unburned hydrocarbons in the exhaust gas by reducing the warm-up time of the engine as described above. To reduce the incidence.

[Means for solving the problem]

The present invention is a thermostat mounted in front of the discharge of the cooling water circulating in the water jacket of the cylinder head communicating with the water jacket of the cylinder block of the engine to achieve the above object, and the supply line in communication with the cooling water discharge path In the cooling water circulator comprising a throttle body and a heater for circulating the cooling water through, a radiator for cooling the cooling water by the opening operation of the thermostat, and a water pump for circulating the cooling water to the water jacket of the cylinder block, A thermocouple detecting a coolant temperature around the combustion chamber in proximity to any one combustion chamber in the cylinder head; A butterfly valve mounted on a coolant discharge port to receive an input signal of the thermocouple and controlling a coolant discharged through a water jacket of the engine; And a bypass line connected between the cooling water discharge port and a pumping circulation line of the water pump, and mounted to the bypass line and pumped to a pumping circulation line to control an excessive temperature change of the cooling water discharged when the butterfly valve is opened. A discharge coolant temperature control valve for bypassing the coolant to the discharge port; The butterfly valve is characterized in that it is installed on the outlet of the close position close to the water jacket.

EXAMPLE

Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system diagram of a cooling water circulator for explaining the present invention,

2 is an excerpt of the present invention, which shows the installation position of the butterfly valve, in which reference numeral 1 denotes an engine, wherein the engine 1 includes a cylinder block 2, a cylinder head 3, and It is composed of an oil pan (not shown), and the water jacket 2a of the cylinder block 2 is configured to communicate with the water jacket 3a of the cylinder head 3, and also the water jacket of the cylinder head 3 ( The discharge port 4 which discharge-circulates cooling water is formed in 3a).

A plurality of combustion chambers 5 are formed in the cylinder block 2 and the cylinder head 3, and the discharge port 4 is a pumping circulation line 6a and a throttle body 7 and a heater of the water pump 6. Circulation line (9) of (8) is connected, and in front of the discharge port (4) is equipped with a thermostat (10), the circulation line 12 for circulating the coolant to the radiator 11 and the throttle body ( 7) and recovery lines 13 and 14 for recovering the cooling water passing through the heater 8 and the radiator 11 are connected.

In the configuration of the coolant circulation device as described above, the engine 1 is a device for controlling the circulation operation of the coolant when the engine is started in the cooling state, in the present invention, the combustion chamber 5 of any one of the cylinder head (5) first; The thermocouple 20 was mounted close to the sensor so that the coolant temperature around the combustion chamber 5 could be sensed, and the outlet 4 for discharging the coolant from the water jacket 3a of the cylinder head 3 was initially started. Equipped with a butterfly valve 21 for controlling the discharge circulation of the cooling water, the bypass line 22 connecting the outlet 4 and the pumping circulation line 6a and the discharge coolant temperature in the bypass line 22 The control valve 23 is provided.

Referring to the present invention having the configuration as described above to control the cooling water circulation at the initial start of the engine (1) cooling to shorten the warm-up time of the engine as follows.

When the engine 1 is started in a cooled state, the engine is operated and the water pump 6 is also operated at the same time.

However, since the combustion chamber 5 is not heated at the beginning, the cooling water circulating in the water jackets 2a and 3a of the cylinder block 2 and the cylinder head 3 is in a low temperature.

Therefore, when the thermocouple 20 mounted close to one combustion chamber 5 of the cylinder head 3 senses the temperature circulating around the combustion chamber 5 and the detected temperature is below the set temperature, the butterfly valve By controlling the opening angle of the (21) to suppress the smooth circulation of the cooling water discharged to the cooling water outlet (4), it creates a condition that the cooling water present in the water jacket (2a) (3a) of the engine can be heated in a short time .

As described above, when the butterfly valve 21 controls the discharge of the cooling water in the water jacket 3a, the cooling water in the water jackets 2a and 3a is short-termed to the set temperature by the heat generated in each combustion chamber 5. When the cooling water of the water jacket is heated to the set temperature, the thermocouple 20 immediately detects the signal and sends a signal to the electronic circuit unit 24. The electronic circuit unit 24 receives the signal. By sending the output again to open the butterfly valve 21 to discharge the coolant heated above the set temperature, in this way, when the coolant discharged to the outlet 4 is heated above the set temperature, the thermostat 10 is The cooling water heated above the set temperature by opening is heat-exchanged while passing through the radiator 11 through the circulation line 12 and is recovered to the recovery line 14. The recovered cooling water is pumped out of the water pump 6. Over the pumping cycle line (6a) by the operation back to the circulation water jacket (2a) of the cylinder block (2), repeating the recovery operation is to repeat.

On the other hand, when the butterfly valve 21 controls the discharge of the cooling water as described above, when the cooling water rises to the set temperature, when the opening operation is performed, the temperature of the cooling water discharged to the outlet 4 and the pumping circulation line 6a and the throttle In order to prevent the coolant temperature on the circulation line 9 side connected to the body 7 and the heater 8 from being excessively changed, the butterfly valve 21 controls the discharge circulation and suddenly discharges the heated coolant. For a period of time from, by opening the discharge coolant temperature control valve 23 installed in the bypass line 22, part of the heated coolant discharged from the discharge port 4 is discharged to the discharge port 4, and then bypassed again. The temperature of the coolant flowing to the pumping circulation line 6a and each circulation line 9 and 12 connected to each device is controlled by causing the circulation to return to the outlet 4 through the line 22. It is possible to induce smooth circulation without phenomenon such as water hammer by preventing occurrence.

In the above, the thermocouple 20, the butterfly valve 21 and the discharge coolant temperature control valve 23 are controlled by the electronic circuit unit 24 to operate automatically, the electronic circuit unit 24 is a computer device of a vehicle Is controlled by an electronic control unit (ECU).

And the butterfly valve 21 for controlling the discharge circulation of the coolant at the initial start of the engine is preferably installed at a distance (L) closest to the engine 1, which is a water jacket while reducing the volume of the water jacket This is to provide the advantage that the cooling water in the jacket can be heated in a short time.

[effect]

According to the present invention, it is possible to improve the combustion efficiency of the combustion chamber by controlling the discharge circulation of the cooling water injected into the water jacket of the engine at the initial start of the engine cooling state to raise the cooling water of the water jacket to a temperature higher than the set temperature in a short time. In addition, by increasing the cooling water to the set temperature within a short time, the preheating action of the air supplied from the throttle body to promote the fuel ignition effect to increase the combustion efficiency, this effect is the fuel In addition to the expectation of complete combustion, exhaust gas has a characteristic of reducing the amount of unburned hydrocarbons, which contributes to preventing pollution and can provide an engine with excellent output performance and fuel efficiency.

Claims (2)

A thermostat mounted in front of the discharge of cooling water circulating in the water jacket of the cylinder head communicating with the water jacket of the cylinder block of the engine, and a throttle body and a heater for circulating the cooling water through a supply line communicating with the cooling water discharge path; And a radiator for cooling the coolant by the opening operation of the thermostat, and a water pump for pumping and circulating the coolant into the water jacket of the cylinder block. A thermocouple sensing the coolant temperature around the combustion chamber; A butterfly valve mounted on a cooling water discharge port which receives the input signal of the thermocouple and exits the engine to control an amount of circulation of the cooling water that is circulated through the water jacket of the engine; The bypass line is connected between the cooling water outlet and the pumping circulation line of the water pump, and the cooling water pumped to the pumping circulation line is installed in the bypass line to control the excessive temperature change of the cooling water discharged when the butterfly valve is opened. A discharge coolant temperature control valve for bypassing the discharge port; Cooling water circulation control device for reducing the warm-up time during engine cooling, characterized in that consisting of. The apparatus of claim 1, wherein the butterfly valve installed at the cooling water outlet is installed at a close distance close to the water jacket.