Denso, Siemens Common Rail Idle Shim

Denso, Siemens CR Idle Shim - 077-113

The Denso – Siemens common rail (CR) idle adjustment shim is a highly functional adjustment component used in Denso and Siemens brand common rail diesel injectors. Operating with precision under high pressure, it contributes to maintaining stable injection pressure. By accurately regulating the amount of fuel injected during low-speed (idle) operating conditions, it ensures stable engine operation, improved fuel efficiency, and optimized emission values. This adjustment shim directly affects idle fuel flow and plays a decisive role in engine startup and low-RPM performance. It is used in injectors of both brands. To meet technical requirements such as high surface quality, wear resistance, and measurement precision, it is manufactured with tight tolerances using a high-precision lapping process.