GB/T 25368-2023Electronic control common rail system for diesel engines—High pressure pump (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 25368-2010 "Technical Conditions for High-pressure Fuel Supply Pump Assembly of Electronically Controlled Common Rail Injection System of Diesel Engines" and is consistent with Compared with GB/T 25368-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The term "rotor fuel supply pump" is deleted (see 3.2 of the 2010 edition);

b) Added the terms "gear type oil transfer pump" and "vane type oil transfer pump" (see 3.3 and 3.4);

c) Changed the description of phase identification of the fuel supply pump (see 4.2, 4.2 of the 2010 edition);

d) Delete the provisions on the installation dimensions of the rotor-type oil supply pump (see 4.3 of the 2010 edition);

e) Changed the pressure value of compressed air at the oil inlet of the oil supply pump (see 4.4.2, 2010 version of 4.4.2);

f) Delete the provisions on the oil supply efficiency of in-line oil supply pumps and rotor oil supply pumps (see 4.5.1 and 4.5.2 of the 2010 edition);

g) Delete the provisions on the unevenness of each cylinder of in-line oil supply pumps and rotor oil supply pumps (see 4.6.1 and 4.6.2 of the 2010 edition);

h) The calculation formula for the unevenness of oil supply in each cylinder of the oil supply pump has been changed (see 4.6, 4.6.3 of the 2010 version);

i) Delete the cleanliness requirements for the rotor fuel supply pump assembly (see 4.7.3 of the 2010 edition);

j) Added cleanliness requirements for radial oil supply pump assembly (see 4.7.3);

k) Delete the cleanliness requirements for oil transfer pumps (see 4.8.4 of the 2010 edition);

l) The technical requirements for oil transfer pumps have been changed to those for gear type oil transfer pumps and vane type oil transfer pumps (see 4.8.4, 2010 edition 4.8.5);

m) Changed the accuracy requirements for flow testers (see 5.1.2, 2010 version of 5.1.2);

n) Changed the technical requirements for test oil (see 5.1.6, 2010 version of 5.1.6);

o) Changed the technical requirements for oil supply pump sealing test (see 5.2, 2010 version of 5.2);

p) Changed the pressure control method of the oil supply pump (see 5.3.1, 2010 version of 5.3.1);

q) The requirements for the fuel supply efficiency test of the fuel supply pump have been changed (see 5.3.2, 5.3.2 of the 2010 edition);

r) Changed the fuel supply pump fuel supply test method (see 5.3.3, 2010 version of 5.3.3);

s) Changed the cleanliness determination method (see 5.5, 2010 version of 5.5);

t) The requirements for the performance test of the oil transfer pump have been changed to comply with the provisions of JB/T 13476 (see 5.6, 5.6 of the 2010 edition);

u) Changed the fuel supply pump reliability test method (see 5.7, 2010 version of 5.7);

v) Added visual inspection requirements for oil supply pumps (see 5.8);

w) Added inspection rules (see Chapter 6).

1 Scope

This document specifies the technical requirements, test methods, inspection rules, markings, and packaging of the high-pressure fuel supply pump assembly in the electronically controlled common rail system of a diesel engine. loading, transportation and storage.

This document is applicable to high-pressure fuel supply pump assemblies of electronically controlled common rail systems used in automobiles, engineering machinery, agricultural machinery, generators and marine diesel engines. design and manufacturing.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 2828.1 Enumeration sampling inspection procedures Part 1: Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)

GB/T 10826.5 Fuel injection device vocabulary Part 5: Common rail fuel injection system

GB 19147 Diesel for vehicles

GB/T 25365.1 Technical conditions for diesel engine electronically controlled common rail injection system assembly Part 1: Mechanical

GB/T 25366 Diesel engine electronically controlled common rail system common rail pipe assembly

JB/T 6295 Piston fuel injection pump installation type and connection dimensions

JB/T 12850 Cleanliness Testing of Diesel Engine Electronically Controlled Common Rail Injection System

JB/T 13476 Diesel engine electronically controlled common rail system gear oil pump

JB/T 13794-2020 Diesel engine electronically controlled common rail system reliability test methods and evaluation rules

3 Terms and definitions

The following terms and definitions as defined in GB/T 10826.5 and GB/T 25365.1 apply to this document.