Bosch Common Rail Trigger Shim

Bosch CR Trigger Shim - 077-103

The bosch common rail (CR) trigger shim is a critical adjustment component in diesel injectors that operates precisely under high pressure and contributes to maintaining stable injection pressure. It ensures the precise control of the fuel quantity and directly affects the amount of fuel injected under mid-range operating conditions. It is a standard component in almost all Bosch diesel injectors. Unlike other calibration shims, it specifically regulates the amount of fuel delivered by the injector at mid-range engine speeds. To achieve high surface quality, superior wear resistance, and measurement precision, it is manufactured with high accuracy through a lapping process.