Browse Publications Technical Papers 2017-01-1052
2017-03-28

Direct Injection Design Principles for Noise Vibration Harshness 2017-01-1052

1Engine ticking noise is one of the key failure modes in today’s direct injection (DI) engines. High ticking noise results in high Things Gone Wrong (TGW) index, which negatively affects customer satisfaction. In this paper, the root cause of the ticking noise from DI injector in direct mounting will be presented. Design principle such as injector impact force to cylinder head and DI injector isolator design with 2 stage stiffness is proposed.

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