Bosch Common Rail Idle Shim

Bosch CR Idle Shim - 077-102

The bosch common rail (CR) idle shim is an adjustment component in diesel injectors that operates precisely under high pressure and contributes to maintaining stable injection pressure. It plays a role in the precise control of the fuel quantity and directly affects the fuel injected during idle speed. It is a standard component in almost all Bosch diesel injectors. Unlike other calibration shims, it specifically regulates the amount of fuel produced by the injector during idle operation. To ensure high surface quality, wear resistance, and measurement precision, it is manufactured with high accuracy through a lapping process.