BS ISO 7876-5:2021 pdf download – Fuel injection equipment — Vocabulary Part 5: Common rail fuel injection system This document establishes a vocabulary for common rail (CR) fuel injection systems for diesel (compression‑ignition) engines and their components. The terms defined in this document are unique to common rail fuel injection systems, terms and definitions relating to other fuel injection systems are found in the other parts of the ISO 7876 series. 2 Normative references There are no normative references in this document. 3? Terms? and? definitions ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at https://www.electropedia.org/ 3.1 common rail fuel injection system common rail injection system CR fuel injection system common rail system CRS high‑pressure fuel injection system, comprised of the high pressure supply pump (3.3), the rail (3.9) or the distribution block (3.10), and the CR injectors (3.5). Note 1 to entry: It is also characterized by the following features: — the fuel pressure of a rail (3.9) or a distribution block (3.10) may be varied independently from engine speed and load and is electronically controlled; — the start and the end of the injections are controlled by an electrical valve at the CR injector (3.5); — the energy for the injections is supplied to the CR injectors (3.5) from a rail (3.9) or a distribution block (3.10) with highly pressurized fuel; — The injected fuel is supplied from a rail (3.9) or a distribution block (3.10). 3.2 fuel feed pump low‑pressure pump delivering fuel from the tank via one or several filters to the high‑pressure generating components 3.10 distribution block high‑pressure storage chamber with the function of supplying the CR injector (3.5) with fuel, and it doesn’t have a long shape 3.11 flow? limiter device located between the rail (3.9) or the distribution block (3.10), and each CR injector (3.5) designed to shut off the fuel flow in the pipe if the maximum permitted flow is exceeded 3.12 flow? damper device located between the rail (3.9) or the distribution block (3.10), and each CR injector (3.5) designed to moderate the fuel pressure pulsation in the pipe caused by each injection Note 1 to entry: This damper may also act as a flow limiter (3.11). 3.13 CR pressure sensor sensor designed to measure the pressure within the rail (3.9) or the...
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