CAT Injector (Remanufacture and Brand New)

1. Product Information

A Caterpillar injector is the fuel injector used on Caterpillar diesel engines to deliver precise amounts of diesel into each cylinder at the correct time and spray pattern. Caterpillar uses several injector technologies across its engine line:

Function: control fuel quantity, timing, and spray pattern to enable efficient combustion, power, and emissions control. Injectors are actuated by engine control signals (electronic or hydraulic) and work with fuel pumps/rails.

Common types used by Caterpillar

HEUI (Hydraulically actuated Electronic Unit Injection): uses high‑pressure engine oil actuation under electronic control (common on older Cat engines).
Common‑rail electronic injectors: electrically controlled injectors fed from a high‑pressure common rail (used on newer Cat engines and ACERT/modern platforms).
Mechanical or unit injectors: integrated pump‑injector units used on some older heavy‑duty designs.

Features: precision nozzle/needle, solenoid or piezo actuator (electronic types), internal metering and seals; may include return lines and pressure control components.