Prime Mover Room Cooling Layout for Exhaust-Air Mixing
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Solution Overview
Problem
Existing working machines face issues such as operator fatigue due to prolonged use of operation members, limited accessibility to hydraulic devices, inefficient fuel tank design, poor weight balance, inadequate cooling efficiency, noise transmission, and temperature management, as well as challenges in cleaning radiators and oil coolers.
Innovation Solution
The design incorporates a cabin mounted on one side of the machine body with a prime mover on the other side, featuring a vertical orientation and improved cooling systems, along with a fuel tank shape that allows effective fuel consumption, enhanced pedal operation ergonomics, and a hydraulic fluid tank structure to manage temperature unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cabin is mounted on one side portion of the machine body and the prime mover on the other side portion, then the weight balance is improved, but the accessibility to hydraulic devices becomes limited
Solution Approach 1:
The machine body is divided into distinct functional zones: the cabin zone on one side for operator comfort and control, the prime mover zone on the other side for power generation, and a central hydraulic device zone for fluid power components. This segmentation allows each component to be optimally positioned for its specific function while maintaining overall system balance and accessibility.
2Volume of moving object
If the fuel tank is arranged below the operator seat, then the space utilization is improved, but the fuel consumption efficiency becomes limited
Solution Approach 1:
The fuel tank is repositioned from a vertical arrangement below the operator seat to a horizontal arrangement in the rear portion of the machine body. This dimensional change allows the tank to extend along the length of the machine rather than occupying vertical space, improving both space utilization and fuel flow characteristics for more efficient combustion.
3Adaptability or versatility
If the boom base is laterally offset with respect to the cabin, then the boom can stand up to the side portion of the cabin, but the weight balance in the machine width direction deteriorates
Solution Approach 1:
The boom base is intentionally positioned asymmetrically relative to the cabin, allowing the boom to operate effectively on the side portion of the cabin while the counterweight is strategically placed to compensate for this asymmetry. This creates a balanced configuration that maintains weight balance in the machine width direction while preserving boom positioning flexibility for various operational requirements.
4Temperature
If the cooling fan introduces outside air into the bonnet, then the prime mover cooling efficiency is improved, but the noise transmission to the operator seat increases
Solution Approach 1:
A noise barrier is introduced as an intermediary element between the prime mover bonnet and the operator seat. This barrier intercepts and blocks the transmission of noise generated by the cooling fan and prime mover operations, preventing it from reaching the operator seat while allowing the cooling air intake function to continue uninterrupted.
5Volume of moving object
If the radiator and oil cooler are arranged opposed to each other, then the space utilization is improved, but the cleaning accessibility becomes difficult
Solution Approach 1:
The oil cooler is designed with movable or detachable mounting that allows it to be repositioned or removed from its opposed arrangement with the radiator. This dynamic configuration enables the oil cooler to be accessed independently for cleaning and maintenance operations, while the radiator remains in its fixed position optimized for space utilization and cooling efficiency.
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
This configuration reduces operator fatigue, improves cooling efficiency, enhances accessibility, maintains weight balance, minimizes noise transmission, and facilitates easier cleaning of components, resulting in a more efficient and comfortable operating experience.
Implementation Method 1
the outside air is introduced into the bonnet by a cooling fan and thereby the prime mover is cooled by a cooling air generated by the cooling fan
Implementation Method 2
a exhaust fan for discharging the exhaust gas to the outside
Data Source
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AI summary
A working machine according to an embodiment of the present invention includes an air cooling system, wherein a cooling airflow flowing between a prime mover (E1) and a ceiling portion (183) of a prime mover room (ER) is mixed with an exhaust gas (203) from the prime mover inside the prime mover room and wherein the mixture is discharged to the outside of the prime mover room through a discharge portion (228).