JPH0326267Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of an air supply system for a turbo engine with an intercooler.

(Prior art) The air supply system for a turbo engine with an intercooler is connected to an intercooler through which air supplied by the turbo passes, an air supply pipe that supplies air cooled by the intercooler to the engine, and this air pipe. It consists of an intake manifold and an intake manifold. However, if the wastegate stays closed or becomes difficult to open, or if the intercooler becomes clogged or its cooling fan breaks down, overboost or cooling performance decreases, causing the supply air temperature (boost temperature) to rise. As a result, the combustion temperature and the exhaust gas temperature rise, and the exhaust gas deteriorates, resulting in a lack of output. In order to prevent this, attempts have been made to use boost gauges, boost alarms, boost thermometers, etc., but all of them have the disadvantage of being expensive.

(Purpose of the invention) The purpose of the invention is to provide an air supply system for a turbo engine with an intercooler that has a simple structure and can release air when the temperature of the intake air reaches an abnormality, and can also warn of the abnormality. It is in.

(Structure of the invention) The air supply system for a turbo engine with an intercooler of the present invention is provided with a safety valve in a part of the air supply passage that supplies air that is supplied by the turbo of the turbo engine with an intercooler and has passed through the intercooler. This safety valve consists of a valve body that retains a low melting point metal that melts at this temperature when the supply air temperature reaches an abnormal set point, and this valve body also prevents the flow of air from escaping due to the melting of the low melting point metal. Therefore, it is characterized by having a recess that generates high-frequency sound.

According to this structure, abnormally high temperature air passing through the air supply passage automatically escapes, and the high-frequency sound generated when this air escapes can alert you to the abnormality. Since this is done using a safety valve with a simple structure, it can be implemented at low cost.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 shows an air supply system 10 for a turbo engine with an intercooler according to the present invention, and a turbo engine 12 with an intercooler is operated by the engine. It has a turbo 17 consisting of a turbine 14 that is driven and a compressor 16 that is started by the turbine 14 and generates compressed air. The air supply device 10 includes an air supply passage 2 that includes an air supply pipe 18 that supplies high-temperature compressed air from a compressor 16 and an intake manifold 20 that is connected to this air supply pipe 18.
It consists of 2. The intercooler 24 is provided in the middle of the air supply pipe 18 and cools the air supplied from the turbo 17. Although not shown, an abnormality in boost pressure is detected and turbo 1
Although a waste gate is provided to release the boost pressure supplied from 7, this waste gate may be omitted.

The air supply device 10 of the present invention includes a safety valve 26 provided in a part of the air supply passage 22. As shown in FIG. 2, this safety valve 26 consists of a valve body 30 that holds a low melting point metal 28 that melts at this temperature when the supply air temperature reaches an abnormal set value. It has a recess 32 that generates high-frequency sound due to the flow of air that escapes as the low melting point metal 28 melts. As the low melting point metal, Sn alloy, Pb alloy, type alloy, etc. can be used depending on the abnormal setting value. In the illustrated embodiment, the recess 3
2 is annular, but it may have another shape. In addition, the valve body 30 is located at 22 of the air supply passage 22.
aIt is screwed into the wall.

Therefore, when the supply air temperature reaches an abnormal set value due to a failure of the wastegate or intercooler, the low melting point metal 28 of the safety valve 26 melts, and the boost pressure causes this abnormal temperature air to flow into the supply air passage 2.
2 to the atmosphere through a safety valve 26. Furthermore, when this air at an abnormal temperature escapes, the annular recess 32 of the valve body 30 generates a large high-frequency sound, thereby making it possible to warn of the abnormality.

(Effects of the invention) According to the invention, as described above, abnormally high temperature air passing through the air supply passage automatically escapes, and the abnormality is alerted by the high-frequency sound generated when this air escapes. Furthermore, since these two functions are carried out by a safety valve of simple structure, there is a practical advantage that it can be carried out at low cost.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a turbo engine with an intercooler equipped with an air supply system according to the present invention;
The figure is an enlarged vertical cross-sectional view of the main parts of the air supply device of the present invention. 10... Air supply device, 12... Turbo engine with intercooler, 17... Turbo, 22... Air supply passage, 24... Intercooler, 26... Safety valve, 28... Low melting point metal, 30... Valve body, 3
2... Concavity.

Claims (1)

[Claims for Utility Model Registration] (1) A safety valve is provided in a part of an air supply passage that supplies air that is supplied by a turbo of a turbo engine with an intercooler and has passed through an intercooler, and the safety valve is configured to control the temperature of the air. a valve body that holds a low melting point metal that melts at this temperature when the temperature reaches an abnormal preset temperature, and the valve body generates high-frequency sound by the flow of air that escapes due to the melting of the low melting point metal. An air supply device for a turbo engine with an intercooler, characterized by having a recess. (2) Utility model registration claim 1, wherein the valve body is screwed into the wall of the air supply passage.
An air supply system for a turbo engine with an intercooler as described in 2. (3) The air supply system for a turbo engine with an intercooler according to claim 1, wherein the recess is annular.