KR200216196Y1 - Engine Start-up and Cooling Efficiency Improvement Device - Google Patents

Abstract

The present invention allows a part of exhaust gas or air to be guided to the combustion chamber side according to the heating state of the engine, thereby facilitating preheating of the combustion chamber during cold start, thereby reducing the warm-up time and saving fuel, and immediately after the preheating The present invention relates to an apparatus for improving the cold startability and cooling efficiency of an engine to prevent overheating, and the present invention is an intake system for supplying air and fuel, and an exhaust system for discharging the combustion gas in a combustion chamber. In the engine structure is provided,

An air jacket 40 formed in the cylinder head 12 in proximity to the combustion chamber 13;

A supply passage 50 formed so that air is guided from the intake machine 20 and exhaust gas is guided from the exhaust system 30 to be supplied to the air jacket 40;

A discharge passage (60) for supplying air or exhaust gas guided to the air jacket (40) to the surge tank (23):

A solenoid valve (70) installed in the supply passage (50) to selectively supply air or exhaust gas to the air jacket (40); And

It is characterized in that it is provided as an electronic control device 80 for controlling the operation of the solenoid valve 70 by a signal from a temperature sensing means.

Description

Engine Start-up and Cooling Efficiency Improvement Device

The present invention relates to an apparatus for improving the cold startability and the cooling efficiency of an engine that variably adjusts a temperature around a combustion chamber according to an engine driving state.

The engine in the vehicle is a portion in which the driving force is generated by the combustion action by appropriately mixing the air and fuel sucked by the engine negative pressure, wherein the air is the air cleaner 2, the throttle body 3 and the surge as shown in FIG. Fuel is introduced into the engine 1 through the intake manifold 5 through the tank 4, and fuel is injected from the intake port provided through the intake manifold 5 and the combustion chamber to the engine side according to the amount of air introduced in this way. It is injected by the device and mixed with air to be supplied to the combustion chamber.

The mixture of fuel and air supplied to the combustion chamber is burned and then discharged through the exhaust manifold 6 and the exhaust pipe 7.

On the other hand, since the combustion power in the combustion chamber can be maximized only when the engine and the fuel are heated to a constant temperature, the warm-up is necessarily performed to prepare the engine for preheating during cold start.

In other words, the engine is cold during the initial start-up, so that the coolant that circulates the engine is recirculated back to the engine without passing through the radiator so that the engine is preheated.

If the engine is heated to a constant temperature immediately after performing such warm-up, the engine is prevented from overheating by the circulation of the cooling water from this time.

However, the conventional cooling system is only to prevent the engine from overheating, and the engine preheating during cold start simply prevents the circulation of the coolant, that is, flows to the radiator, so that the coolant circulates the engine and recycles the engine again in the heated state. Since the preheating is effected by the action of promoting the heating of the cooling water, a very long time is delayed until the engine is preheated, which leads to the consumption of unnecessary fuel for promoting the preheating, thereby deteriorating the emission.

Therefore, the present invention was devised to improve the above problems. The present invention allows some exhaust gas or air to be guided to the combustion chamber side according to the heating state of the engine. At the same time, it is an object of the present invention to provide an apparatus for improving the cold startability and cooling efficiency of the engine, which enables fuel saving and prevents overheating of the combustion chamber immediately after being preheated.

In addition, the present invention has another object to improve the engine durability by reducing the thermal load of the combustion chamber due to overheating while improving the emission during cold start by the early heating of the combustion chamber.

The present invention as a means for achieving the above object

In an engine structure provided with an intake system for supplying air and fuel and an exhaust system for discharging the gas burned in the combustion chamber,

An air jacket formed in the cylinder head in close proximity to the combustion chamber;

A supply passage configured to guide air from the intake system and guide exhaust gas from the exhaust system to be supplied to the air jacket;

A discharge passage for resupplying air and exhaust gas induced into the air jacket to a surge tank;

A solenoid valve installed in the supply passage to selectively supply air or exhaust gas to the air jacket; And

An electronic control device for controlling the operation of the solenoid valve by a signal from a temperature sensing means;

It is characterized by a configuration to be provided as.

1 is a schematic embodiment structure diagram according to the present invention

2 is a conventional engine structure diagram

※ Explanation of symbols for main parts of drawing

10: engine

13: combustion chamber

20: intake machine

30: exhaust system

40: air jacket

50: supply passage

60: discharge passage

70: solenoid valve

80: electronic control unit

This will be described in more detail with reference to the accompanying drawings.

1 shows an embodiment structure according to the present invention, 10 is an engine, 20 is an intake machine, 30 is an exhaust system.

The engine 10 is largely divided into a cylinder block 11, a cylinder head 12, and a combustion chamber 13. The intake system 20 includes an air cleaner 21, a throttle body 22, a surge tank 23, It consists of the intake manifold 24 and the intake pipe 25 which connects them, and the structure of the exhaust system 30 as the exhaust manifold 31, the exhaust pipe 32, and a catalyst is the same as before.

The present invention is to form an air jacket 40 to allow air or exhaust gas to pass to the combustion chamber 13 side of the cylinder head 12 is provided with a combustion chamber 13, the air jacket 40 The supply passage 50 through which the exhaust gas is introduced and the discharge passage 60 through which the inlet air or the exhaust gas is discharged are connected to each other, and the solenoid valve 70 is mounted on the supply passage 50 so that the intake system ( The air derived from 20 and the exhaust gas derived from the exhaust system 30 are selectively supplied to the air jacket 40.

In addition, the solenoid valve 70 is controlled by the electronic control device 80 by a signal from the temperature sensing means, in particular, the discharge passage 60 and the surge tank 23 of the intake machine 20 and To be connected.

On the other hand, in the structure as described above, the end of the intake system 20 side of the supply passage 50 is the throttle body 22 or air, which is the previous structure having a lower negative pressure than the surge tank 23 to which the discharge passage 60 is connected. It is more preferable to be connected to the intake pipe 25 connecting the cleaner 21 and the throttle body 22.

In addition, it is most preferable that the temperature sensing means, which is a signal means for switching the solenoid valve 70 to be checked by the electronic control device 80, is provided as a cooling water temperature sensor or an oil temperature sensor separately mounted on the bottom of the oil pan. .

In particular, the air jacket 40 may be formed as a structure that is close to the combustion chamber 13, but if it is impossible to form by a water jacket formed to be close to the layout of the combustion chamber 13, the air jacket 40 is a structure that is close to the water jacket. It can also be formed as an indirect control structure for forming and heating or cooling the cooling water passing through the water jacket.

Referring to the operation of the present invention according to the above configuration, since the temperature checked from the temperature sensor immediately after the engine is started is lower than the temperature preset in the electronic control device 80, the electronic control device 80 is a solenoid valve 70 Is operated to communicate the supply passage 50 extending from the exhaust system 30 with the air jacket 40.

Then, when the exhaust gas combusted during cold start is discharged through the exhaust manifold 31 and the exhaust pipe 32, some of the exhaust gas is supplied to the combustion chamber 40 through the supply passage 50 and the solenoid valve 70. Guided to jacket 40 promotes heating of combustion chamber 40.

The acceleration of the heating of the combustion chamber 40 by the exhaust gas promotes the heating of the cooling water at the same time and at the same time normalizes the viscosity of the oil to improve the combustion efficiency of the mixer in the combustion chamber 40, where the combustion chamber 40 Exhaust gas passing through is introduced into the surge tank 23 again to be re-burned in the combustion chamber 40 to significantly reduce the emissions of unburned gas.

In particular, since a large amount of fuel supply for the preheating promotion is unnecessary by the recirculation of the exhaust gas as described above, fuel consumption can be greatly reduced, and vehicle fuel economy is also improved at the same time.

On the other hand, when the engine is normally driven early and the temperature higher than the temperature preset by the temperature control sensor to the electronic control device 80 is checked, the electronic control device 80 operates the solenoid valve 70 again to operate the air jacket 40. In order to facilitate the cooling of the combustion chamber 13 by allowing the air to be guided from the intake system 20 while preventing the exhaust gas from being induced any more.

This accelerates the cooling of the combustion chamber 13, which has a higher thermal load than other parts of the engine, thereby preventing deformation or damage of particularly weak components such as valve seats due to overheating the combustion chamber 13, thereby preventing engine damage. To improve further.

Therefore, by improving the structure according to the present invention, it is possible to accelerate the preheating of the engine during cold start, thereby reducing the consumption of fuel and reducing the emission of harmful exhaust gas, and reducing the thermal load of the combustion chamber to reduce the engine load. There is a very useful effect that can increase durability.

Claims (5)

In an engine structure provided with an intake system for supplying air and fuel and an exhaust system for discharging the gas burned in the combustion chamber, An air jacket 40 formed in the cylinder head 12 in proximity to the combustion chamber 13; A supply passage 50 formed so that air is guided from the intake machine 20 and exhaust gas is guided from the exhaust system 30 to be supplied to the air jacket 40; A discharge passage (60) for supplying air or exhaust gas guided to the air jacket (40) to the surge tank (23): A solenoid valve 70 installed in the supply passage 50 to selectively supply air or exhaust gas to the air jacket 40; And An electronic control device (80) for controlling the operation of the solenoid valve (70) by a signal from a temperature sensing means; Apparatus for improving the cold startability and cooling efficiency of the engine, characterized in that the configuration to be provided as. The method of claim 1, Cold startability of the engine, characterized in that the inlet system 20 side end of the supply passage 50 is connected to the throttle body 22 having a lower negative pressure than the surge tank 23 to which the discharge passage 60 is connected And a cooling efficiency improving device. The method of claim 1, Cold startability and cooling efficiency of the engine, characterized in that the end of the intake system 20 side of the supply passage 50 is connected to the intake pipe 25 for connecting between the air cleaner 21 and the throttle body 22 Enhancement device. The method of claim 1, Temperature sensing means for supplying a control signal to the electronic control device (80) is an apparatus for improving the cold startability and cooling efficiency of the engine, characterized in that the cooling water temperature sensor for detecting the temperature of the cooling water in the cooling device. The method of claim 1, Temperature-sensing means for supplying a control signal to the electronic control device 80 is provided with an oil temperature sensor to be mounted separately to the bottom of the oil pan, the apparatus for improving the cold startability and cooling efficiency of the engine.