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Fuel Injection Rail Example Oil Tube Example

Vibration analysis is a technology used to analyze what type of stress is put on an object being subjected to vibration. It also analyzes the level of vibration frequency that will cause the object to resonate, and with what level of acceleration.
Sanoh is able to optimally and quickly perform design by analyzing such points as what type of stress and what level of acceleration objects attached to the engine are subjected to while the engine is running.

• Vibration Analysis Example 1: Fuel Injection Rail (FIR)
- A study of stress and acceleration under the conditions equivalent to engine vibration

* FIR is a device attached to the upper portion of the engine to supply fuel to the engine.

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Stress distribution

Acceleration

This is an example of the analysis of an L-shape FIR for a four-cylinder engine.
Stress and acceleration of the feed tube of an FIR attached to an engine were analyzed as research to prevent fracturing and other damage to the FIR caused by engine vibration.

The above right graph indicates the measured resonance frequency and acceleration at the feed tube portion when vibrations from three directions, X, Y, and Z, were generated under the condition that the FIR's stays are bolted. The horizontal axis of the graph indicates the frequency, and the vertical axis indicates the acceleration.
This graph shows that there is a resonance at around 230 Hz in the Y direction, which is recognized from the peak of the graph, and that the acceleration in the Y direction is higher than those in other directions.

The above left image indicates the measured stress caused by vibration at 230 Hz in the Y direction, which causes higher acceleration than those in other directions. It can be seen that greater stress occurs at the base of the feed tube than at other areas because the feed tube is swung by the vibration.
However, the strength of the stress is within a tolerable range, and therefore, it is confirmed that this vibration is not problematic to the FIR as a product.

• Vibration Analysis Example 2: Oil Tube
- A study of stress and acceleration under the conditions equivalent to engine vibration

* Oil tube is a tubular product that is attached to the engine.

Stress distribution

Acceleration

This is an example of the analysis of an oil tube.
Stress and acceleration of an oil tube attached to an engine were analyzed as research to prevent fracturing and other damage to the FIR caused by engine vibration.

The above right graph indicates the measured resonance frequency and acceleration at the most displaced part when vibrations in three directions, X, Y, and Z, were generated under the condition that the both ends of the oil tube are bolted.
The horizontal axis of the graph indicates the frequency, and the vertical axis indicates the acceleration. This graph shows that although the acceleration in the Y direction is the highest among the three directions, there was no resonance (the peak of the graph) at any frequency within the measured range in any directions.

The above left image indicates the measured stress caused by vibration at 230 Hz in the Y direction, which causes higher acceleration than those in other directions. It can be seen that greater stress occurs at the base of the oil tube than at other areas because the oil tube is swung by the vibration.
However, the strength of the stress is within the tolerable range, and therefore, it is confirmed that this vibration is not problematic to the oil tube as a product.