Forming Process Anomalies in Diesel Fuel Injection Control Sleeve
The cold start advance solenoid sleeve was found leaking through the wall during troubleshooting complain of a diesel engine that failed to start in cold weather. The component was revealed to be a tubular product with a “bulb” section at one end and threads on the other. The manufacturing method used to create the bulb shape was hydroforming, using a 300 series stainless steel tube in the full-hard condition. The leak was attributed to a crack in the sleeve in the radius between the bulb area and the cylindrical portion of the sleeve. Fatigue cracks initiated at multiple sites...
Forming Process Anomalies in Diesel Fuel Injection Control Sleeve, ASM Failure Analysis Case Histories: Automobiles and Trucks, ASM International, 2019, https://doi.org/10.31399/asm.fach.auto.c0089258
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