Work Vehicle Exhaust Mixing Pipe Cooling
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Solution Overview
Problem
Conventional work vehicles discharge high-temperature exhaust gas directly outside, posing a risk to nearby workers and deteriorating the working environment, as the exhaust gas purifying devices do not effectively manage the temperature of the exhaust gases.
Innovation Solution
A work vehicle design featuring an exhaust apparatus with a mixing exhaust pipe that draws ambient air and mixes it with the exhaust gas from the purifying device, discharging the cooled gas outward, thereby reducing the temperature and minimizing exposure to the operator and assistant workers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the exhaust gas is discharged straight to the outside through the upper end opening of the pipe element, then the exhaust gas purifying device can effectively remove particulate matter, but the high-temperature exhaust gas deteriorates the working environment and adversely affects assistant workers
Solution Approach 1:
The patent introduces a mixing pipe as an intermediary component between the exhaust gas purifying device and the discharge opening. This mixing pipe draws in ambient air and mixes it with the hot exhaust gas, thereby cooling the exhaust gas before discharge. The mixing pipe acts as a mediator that transforms the harmful high-temperature exhaust gas into a cooler, safer discharge while maintaining the purification effectiveness of the exhaust gas purifying device.
Solution Approach 2:
The patent changes the temperature parameter of the exhaust gas by introducing ambient air into the mixing pipe. The mixing of hot exhaust gas with cooler ambient air reduces the temperature of the discharged gas from high-temperature to a safer level, while maintaining the flow and discharge functionality of the exhaust system.
2Reliability
If the exhaust gas purifying device performs regeneration processing to burn captured particulate matter, then the capturing function is maintained, but the exhaust gas temperature increases and creates harmful effects
Solution Approach 1:
The mixing pipe serves as an intermediary that receives the high-temperature exhaust gas from the regenerating exhaust gas purifying device and mixes it with ambient air. This process cools the hot exhaust gas while allowing the regeneration function to proceed normally, thus maintaining particulate matter removal effectiveness while reducing the harmful temperature effects.
Solution Approach 2:
The patent converts the harmful high-temperature exhaust gas produced during regeneration into a beneficial cooling process. By intentionally mixing the hot exhaust gas with ambient air in the mixing pipe, the system transforms the harmful thermal energy into a controlled cooling mechanism that reduces exhaust gas temperature before discharge, turning a harmful effect into a useful temperature reduction.
3Device complexity
If the work vehicle is not provided with a cabin, then the structure is simpler, but both the operator and assistant workers are exposed to harmful influences from high-temperature exhaust gas
Solution Approach 1:
The mixing pipe acts as an intermediary cooling device that reduces exhaust gas temperature before discharge, providing protection to both the operator and assistant workers without requiring a cabin structure. This solution maintains structural simplicity while effectively mitigating the harmful effects of high-temperature exhaust gas exposure through passive cooling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively lowers the temperature of the exhaust gas, improving the working environment by reducing the risk of heat exposure and maintaining the effectiveness of the exhaust gas purifying device.
Implementation Method 1
a mixing exhaust pipe for drawing ambient air by the exhaust gas emitted from the exhaust pipe, mixing the exhaust gas with drawn ambient air, and discharging the mixed gas to the outside from a discharge opening
Implementation Method 2
The mixing exhaust pipe is arranged in a lower side position of the motor section on one side of a vehicle width direction with its axis extending along a longitudinal direction of the vehicle body and with the exhaust gas being discharged toward the front of the vehicle body
Data Source
AI summary
An exhaust gas purifying device is disposed in a portion of a motor section rearwardly of a vehicle body. A cylindrical mixing exhaust pipe is provided in a distal end portion of an exhaust pipe, through which exhaust gas discharged from the exhaust gas purifying device flows. The mixing exhaust pipe has a larger diameter than the exhaust pipe to overlap the exhaust pipe in a radial direction for drawing ambient air by the exhaust gas discharged from the exhaust pipe and mixing drawn air with the exhaust gas to discharge the mixed gas to the outside from a discharge opening. The mixing exhaust pipe is arranged in a lower side position of the motor section on one side of the vehicle width direction with the exhaust gas being discharged toward the front of the vehicle body.