KR101343755B1 - Real Time Temperature Indicator for Engine Operation - Google Patents

Abstract

The present invention is an invention for real-time detection of temperature changes around the engine and in the engine room that can directly affect the combustion efficiency of the engine, the engine room not only serves as a space for installing the engine, but also intake air supply and cooling It is a space to share a direct relationship.

Whether it is a fixed space or a moving space such as a vehicle, the airflow of the engine room must be changed according to the operating characteristics, and the temperature change at this time is a factor that affects the engine intake air density and air volume, which is directly related to the engine performance and efficiency. By providing real time change, it is possible to secure a factor that can provide the combustion characteristics of the engine with high efficiency. As a result, real-time temperature information of the engine and its surroundings, that is, the engine room, varies for the engine's high efficiency operation depending on the coolant and the external cooling air flow. Therefore, the temperature sensor is installed on the surface of the engine's coolant outlet hose, and the air passage is secured to the sensor housing so that the cooling air flows to the temperature sensor according to the engine operation change. If the sensor is added or subtracted from the sensor inlet, it is possible to correct the detection signal according to seasonal and positional environment changes. It is a real-time temperature sensor of engine operation change configured to display engine surface temperature and external change information according to operation in real time.

Combustion efficiency, engine room, real-time detection, intake air, air density, coolant outlet hose

Description

Real Time Temperature Indicator for Engine Operation

The present invention relates to an internal combustion engine, that is, an engine, and the engine includes a four-stroke engine and a two-stroke engine. These strokes are divided according to the process of intake of fuel and air. The temperature change in the engine room where the engine is installed can only affect the engine intake air, so the engine temperature conditions change according to the engine room or engine running. The conditions for cooling the engine will also be different. The temperature of the engine is the coolant temperature, the cooling system that cools the coolant, and the external air flow and temperature changes that determine the engine's cooling. Detection of this change is an important factor in optimizing engine combustion. )

There are large changes in reciprocating engines or internal combustion engines.

There is an air-fuel ratio that determines the first intake air volume and fuel volume.

The air-fuel ratio is the ratio of air weight to incoming fuel weight, which is an important factor in determining combustion conditions.

Second, there is a compression ratio that defines the degree of compression.

Third, the displacement will be determined by the maximum volume of the combustion chamber and the combustion cylinder cylinder.

Fourthly, the firing angle of the firing angle that determines when to inject the fuel and in what state the spark is generated.

Fifth, the injection pressure of fuel and its particle diameter, that is, particle diameter

Sixth, how far can fuel particles go into the combustion chamber of compressed air? Spray particle reach

The ignition delay time, in which the combustion is extended to the whole in the seventh ignition state, is the element of combustion.

Among the above factors, the intake air density is affected by the temperature change around the intake engine, i.e. the room, and thus, the heated low density air and the cooled high density air are direct factors in the air-fuel ratio and volumetric efficiency that determine the engine performance.

[Literature information of the prior art]

1.Patent No. 10-1257202
2. 1997 National Studies; High efficiency electronic control of spark ignition internal combustion engine

   Development of Ignition System Technology: Ministry of Commerce, Industry and Energy

3. Internal Combustion Engine Hand Book: Japan

4. Internal Combustion Engine Technology Hand Book: Korea Society of Automotive Engineers

5. Automotive Engineering: Kwon Oh-sik, Ko Soo-young

6. Diesel Engine: Professor Seoul National University

7.Automatic Electric / Electronics: BOSCH

8. Automotive Electronic Control Theory: Kim Jae-hee

The most prominent phenomenon that occurs when the engine is running is that the engine temperature is increased in the case of a large combustion loss, and the engine temperature is maintained at an appropriate level in an engine with a small combustion loss.

This phenomenon can detect the loss of combustion efficiency by the temperature of the engine and optimize the temperature around the engine, ie the engine room, for proper combustion.

Not only the detection of the engine itself, but also the detection of changes in the ambient conditions in which the engine is installed can provide information that can directly and indirectly find the information that can optimally control the combustion atmosphere of the engine, thereby improving the efficiency of the engine.

The typical sensing method is to measure the temperature of the engine. The typical method is to install a water temperature sensor in the cooling water pipe to detect the temperature of the cooling water and display it on the temperature gauge.

This method cannot detect temperature changes around the engine.

In addition, in the case of an engine in which the engine is operated, the ambient conditions are continuously changed according to the cooling characteristics of the cooling system and the flow of external air, which is somewhat different from the operation of a stationary or fixed engine. Of course, even in a fixed engine, the change of intake air around the engine cannot be constant.

The factors of temperature change, such as the operating state of the cooling system, the load characteristics of the engine, external climate change, and position, are indeed varied.

Therefore, the operating temperature of the moving engine, the stationary engine, or the engine and the surrounding atmosphere, that is, the temperature change in the engine room can be detected in real time.

The above-mentioned factor of changing the atmosphere around the engine is the effect of temperature change of the engine. Secondly, the degree of operation of the cooling system with the operation of the engine is changing the temperature. Thirdly, when the engine is running, the moving equipment changes the cooling conditions as the air flows through the radiator, or cooler, as the movement changes. Fourth, the change in the amount of combustion fuel that causes the combustion temperature according to the load of the engine causes the engine temperature change. Fifth, there is a change in the atmosphere according to the external temperature, that is, climate and location characteristics.

It is not only complicated to detect and distinguish the complex temperature change that changes around these engines, but also it may be inconsistent with real life and may question the real-time control effect.

Therefore, the temperature of the engine is obtained from the change in the coolant temperature, but the ambient conditions are complex by detecting the difference in the cooling effect according to the operating conditions of the cooling system, the air flow according to the moving speed, the density of the outside air, and the temperature conditions. You need a sensor on the engine running temperature sensor to send the information in real time.

The effect that the present invention can cause in the internal combustion engine is to provide information that can control the engine operation in optimum conditions by detecting the ambient temperature of the engine. Through this information, it is sensing for the purpose of controlling the atmosphere around the engine as a condition for maximizing engine combustion efficiency. In addition, it is possible to prevent malfunctions and loss factors of components that control the combustion of the engine, so that complex information for engine protection can be continuously provided.

This invention can improve the combustion efficiency of the engine, can improve energy efficiency and also protect the air environment can be utilized throughout the industry, in particular contribute to the effective operation of the engine is a very useful invention.

In order to implement the present invention, as shown in Fig. 1, an indirect temperature sensor 1 in the engine room and the cab is connected to a detection signal 9 through a signal transmission line. To be installed in a sealed retractable structure (sensor) or the temperature sensor of the present invention was configured as an exposure-type indirect temperature sensor as shown in FIG.

The temperature sensor is shaped as shown in FIG. 2 (5) so as to be able to conduct indirect heat by banding the surface of the radiator coolant outlet hose so as to sense the engine temperature. It is a thermal plate (Fig. 3) utilizing a metal plate having a high thermal conductivity, for example, a metal plate such as copper plate. The temperature sensor 7 is installed at an appropriate position in FIG. 3, assembled to a sensor housing 6, and banded to the radiator hose with the bending portion of the heat conducting plate 5 exposed to the outside to enable temperature sensing. One exposed type indirect temperature sensor (Figure 2). In the sensor housing 6 of FIG. 2, the fixed side 3 and the adjusting side 4 can be adjusted to control the air flow by adjusting the air passage 2 in employing the air passage 2. .

This configuration can sense the change in the external air flow at the same time as the coolant temperature change of the engine, and in the case of a moving engine such as a vehicle, the result of the cooling of the exposed indirect temperature sensor (Fig. 2) by the external air flow (Fig. 5) is the result. It is supposed to be detected by the signal detector (9). In other words, by adjusting the air passage 2 of the sensor housing 6 to adjust the amount of cooling air flowing through the exposure-type indirect temperature sensor (Fig. 2), the indication value is corrected according to the purpose even in season change, position change and external environment change. This indication is configured such that the sensing content of the exposure type indirect temperature sensor is displayed on the detection signal 9 through the connecting line 8 as shown in FIG.

Fig. 5 illustrates the airflow phenomenon during the movement of the vehicle, and the position of the exposed type indirect temperature sensor Fig. 5 (1) installed on a radiator, a cooling fan, and a coolant outlet hose, The process of detecting the cooling change and transmitting the detected signal to the detection signal 9 installed in the cab is described.

As described above, it is an engine real-time temperature sensor that changes the temperature of the engine and the surroundings of the engine so as to be displayed as a signal.

1 is a layout view of the engine room and the cab of the present invention;

2 is a detailed configuration of the exposure-type indirect temperature sensor

3 is a view illustrating a temperature sensor installed on a heat conducting plate

4 is a circuit diagram of the present invention.

5 is an explanatory diagram of air flow to a cooling system and an exposed indirect temperature sensor in an on-vehicle engine;

***** Explanation of symbols in the drawings *****

In Fig. 1, reference numeral 1 denotes an exposed indirect temperature sensor, 2 air passages in Fig. 2, 3 fixed sides, 4 adjustable sides, 5 thermal conductive plates, 6 sensor housings, 7 temperature sensors,

In FIG. 4, 8 denotes a connection line, and 9 denotes a detection signal.

Claims (1)

In order to detect the change in the temperature of the engine and the surroundings when the engine is running, the exposed indirect temperature sensor 1 is installed in contact with the surface of the radiator coolant outlet hose of the engine. The exposure type indirect temperature sensor (Fig. 2) is a temperature sensor (7) suitable for temperature sensing in contact with the heat conducting plate (5) using a thermally conductive metal plate in contact with the sensor housing ( 6) It is a structure assembled in The engine and the outside are installed by installing an indirect type temperature sensor (FIG. 2) where the air flowing from the outside can flow when moving the engine, such as a cooling system of the engine itself and an automobile operated when the engine is running. Real-time detection of temperature changes according to air flow, The sensor housing uses the amount of cooling air flowing into the exposed indirect temperature sensor (Fig. 2) when the change in external environment, season, position and engine operation characteristics exceeds the limit on the temperature sensing. Engine real-time temperature sensor with a structure that can correct the displayed temperature indication by transmitting and adjusting the detected temperature signal through the connecting line (8) to the detection signal (9) through the fixed side and the control side installed in (6). (Real time temperature indicator for engine operation).

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