After the motor vehicle is used for a long time, a little carbon deposit is formed in the needle valve surface of fuel injector and the fuel injection quality will be affected.
汽车经长时间使用后，喷油器针阀表面会形成少量积碳，影响其喷油质量。
By theoretical analysing and calculating, we find the short needle valve fuel injector can further decrease the impact stress of the needle valve to the sealed conical surface.
经理论分析和计算发现，短针阀喷油器可以进一步降低针阀对密封座面的冲击应力。
By theoretical analysing and calculating, we find the short needle valve fuel injector can further decrease the impact stress of the needle valve to the sealed conical surface.
经理论分析和计算发现，短针阀喷油器可以进一步降低针阀对密封座面的冲击应力。
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