Fuel Cell Vehicle Muffler Chamber Layout
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Solution Overview
Problem
In fuel cell vehicles, the installation of a muffler in the hydrogen tank chamber is hindered by limited space, leading to interference with the tank and a reduction in the occupant compartment volume.
Innovation Solution
The fuel cell vehicle is designed with a first chamber for the fuel cell stack and a second chamber behind it, where the muffler is placed between the tank and the side wall, allowing for its installation without interfering with the tank, and the chamber configuration reduces the volume impact on the occupant compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a muffler is installed in the hydrogen tank chamber, then exhaust sound reduction is achieved, but the tank and muffler interfere with each other due to limited space
Solution Approach 1:
The hydrogen tank chamber is divided into a front portion and a rear portion, with the muffler installed in the front portion and the tank positioned in the rear portion. This segmentation allows both components to coexist without interference while maintaining the exhaust sound reduction function.
2Object-affected harmful factors
If the hydrogen tank chamber is enlarged to accommodate a muffler, then muffler installation is possible, but the protruding region of the floor part expands and reduces the occupant compartment volume
Solution Approach 1:
The front portion of the hydrogen tank chamber is designed with a larger width to accommodate the muffler, while the rear portion has a reduced width for the tank. This local differentiation allows muffler installation without uniformly expanding the chamber and reducing occupant compartment volume.
3Reliability
If the muffler is installed in the hydrogen tank chamber, then drainage and reverse water flow prevention are improved, but the device complexity increases due to space constraints
Solution Approach 1:
The hydrogen tank chamber employs an asymmetric configuration where the front portion is wider than the rear portion. This asymmetric design efficiently accommodates the muffler and enables proper drainage function without requiring overly complex structural modifications.
Data Source
AI summary
A fuel cell vehicle includes a fuel cell stack, a tank, a discharge flow path discharging a fluid discharged from the fuel cell stack, a muffler attached to the discharge flow paths, and a vehicle member defining a first chamber and a second chamber, the first chamber accommodating the fuel cell stack and the second chamber being disposed behind the first chamber and accommodating the tank and the muffler. The second chamber is also provided with a front portion and a rear portion continuous with the front portion, the rear portion being shorter than the front portion in average length in a vehicle width direction. The muffler is disposed between the tank and one of a pair of side wall portions defining side walls of the front portion in the vehicle width direction.