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Turbocharger failure in Vehicle test 2007. 9. 12.

Turbocharger failure in Vehicle test 2007. 9. 12. Turbocharger failure in vehicle test. History - Turbocharger failure in LM T-CAR#04(2.0L, AT) vehicle brake test - Turbocharger failure was happened after the module replacement. - The module number failed is 7338-014.

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Turbocharger failure in Vehicle test 2007. 9. 12.

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  1. Turbocharger failurein Vehicle test2007. 9. 12.

  2. Turbocharger failure in vehicle test • History - Turbocharger failure in LM T-CAR#04(2.0L, AT) vehicle brake test - Turbocharger failure was happened after the module replacement. - The module number failed is 7338-014. - No issue was found to origin module though the mileage was short. - Oil pressure checking results in HMC after the turbo failure The oil didn’t flow to the turbocharger.

  3. Turbocharger failure in vehicle test • Root cause - There was a block in the inlet hole from the engine at the parting line. - The burr of 1mm thickness was occurred at the parting line because of the upper mold was not match with the lower mold. - This burr blocked the oil flow into the module from the engine, result in the oil couldn’t flow to the turbo. Parting line Clean part with no burr Closed part with burr

  4. Turbocharger failure in vehicle test • Oil supply path to turbocharger Oil discharge to the engine Oil inlet from the engine Oil flow path in the module Oil supply to the turbocharger Oil flow path in module inside

  5. Turbocharger failure in vehicle test • The countermeasure - Casting material Current : Inspection with the naked eye After : Add the process to remove the burr - Machining process for the inlet hole Current : No machining After : Add the machining process in the program

  6. Turbocharger failure in vehicle test • The compensation for the failure - The loss estimated by HMC 1 BSM scrapped 2 turbochargers and marginal parts : Almost KRW 30,000K - MD proposal 1 BSM replacement with no cost 4 BSMs delivery with no cost

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