ISO 12251:2026
ISO 12251:2026 Diesel engines - Clamp mounted CR fuel injectors - Mounting dimensions
standard byInternational Organization for Standardization , 01/01/2026
standard byInternational Organization for Standardization , 01/01/2026
This document specifies dimensional requirements for clamp mounted CR fuel injectors and their corresponding cylinder head features in diesel engines.
u000bAccording to the injector nozzle capnut, the clamp mounted CR fuel injectors can be divided into two types:
u000bu000bTypeA, where the nozzle capnut is straight (see Figure4);u000bTypeB, where the nozzle capnut is stepped (see Figure5).u000bu000bEach clamp mounted CR fuel injector type is subdivided by a series of different sizes.
u000bNOTE This differentiation corresponds to the relationship between the two guide diameters of the clamp mounted CR fuel injectors.