Exhaust gas temperature reduction device for an engine of construction equipment

Abstract

The invention relates to an exhaust gas temperature reduction device for an engine of construction equipment. The exhaust gas temperature reduction device includes: a cooling fan (3) disposed on a side of an engine room (7) to introduce external air, thereby generating a cooling fan air current (9); a tail pipe (10) including a turbulence flow inlet port (14) and a first guide (13a) for guiding the cooling fan air current (9) into the inside of the engine room, the tail pipe (10) having one end connected to an exhaust gas reduction device (6) and the other end extending to the outside of the engine room (7) to discharge overheated gas discharged during recycling by the exhaust gas reduction device (6) to the outside; and a diffuser (20) including an external air inlet port (24) exposed to the outside of the engine room (7) and a second guide (23a) disposed adjacent to the external air inlet port (24) to guide introduced external air to the inside of the engine room, the diffuser forming a separate space surrounding an outer diameter of the tail pipe (10) to prevent the diffuser from directly contacting the tail pipe (10).

Description

technical field [0001] The invention relates to a device for reducing the exhaust gas temperature of a construction machine engine. More specifically, the present invention relates to an improved exhaust gas cooling device for a construction machine engine, wherein when the exhaust gas generated during combustion of the engine, preferably a diesel engine of a construction machine, passes through a diffuser and a tailpipe At this time, the exhaust gas is mixed with the cooling fan air flow and the outside air so that the cold exhaust gas can be discharged outside the engine compartment. Background technique [0002] Generally, in a diesel engine using fossil fuel or a hybrid type construction machine using fossil fuel and electric energy, a smoke suppressing device that regenerates and post-processes exhaust gas is generally used in the diesel engine or hybrid type construction machine. [0003] In particular, particulate matter (PM) contained in exhaust gas emitted from con...

AI Technical Summary

Problems solved by technology

[0008] However, a problem encountered in the conventional exhaust gas cooling device is that since the air flow 9 generated by the cooling fan 3 directly passes through the outer peripheral surface of the tail pipe 1, or the exhaust gas and the air flow 9 cannot effectively mix with each other in the tail pipe 1, the The temperature of the exhaust gas discharged outside through the tail pipe 1 reaches a high temperature, for example, about 500°C

[0009] As a result, this high-temperature exhaust gas causes overheating of the diffuser 4

In addition, although the high-temperature exhaust gas does not directly contact the tailpipe 1, there is a problem that it may cause fire or personal injury through contact with the diffuser 4

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