ISO 21042:2018 PDF

Name: ISO 21042:2018 — Gasoline engines with direct fuel injection (GDI engines) — Installation of the high pressure fuel pump to the engine
SKU: ISO 21042:2018
Price: 25 EUR
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Gasoline engines with direct fuel injection (GDI engines) — Installation of the high pressure fuel pump to the engine

Название (английский):

ISO 21042:2018

Gasoline engines with direct fuel injection (GDI engines) — Installation of the high pressure fuel pump to the engine

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 5
Дата публикации:: 20 августа 2018 г.
Издание:: ISO IS 21042 edition 1 version 1
ICS:: 43.060.40

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Описание (английский):

This document specifies dimensions required for the installation and integration of the high pressure fuel pump in gasoline (GDI) engines. The location of the fuel connections and the dimensions of the pump outside shape are not defined since they vary according to the manufacturer of the pump and to the particular application.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 21042:2018 provides dimensional and tolerance guidance for the installation and integration of the high-pressure fuel pump in gasoline direct injection (GDI) engines. The standard focuses on the engine-side flange interface and mounting characteristics required for robust, repeatable assembly. It does not prescribe the external pump housing shape or the precise location of fuel connections, which vary by pump supplier and application.

Why this matters: correct flange dimensions, bolt patterns and connector compatibility reduce integration risk, improve interchangeability between suppliers and simplify service and assembly procedures.

Key Topics

Engine flange interface and tolerances

Preferred bore and mounting details include D1 = 35H7 and options for D2 = 32H7 or 26H7 where applicable.
Bolt size: preferred M8 (M6 optional) and common mounting pitch values (e.g., 66 mm preferred; alternatives listed).
Bore depth and effective screw depth: minimum bore depth values are given (e.g., 12 mm min.), and a practical minimum effective screw depth of around 15 mm is recommended to match material quality and bolt size-final values to be agreed between pump supplier and engine manufacturer.

Pump intrusion / height and guiding

The document addresses the pump intrusion (lower housing height) and guiding cylinder for the tappet to ensure correct mechanical engagement with the camshaft lobe.

Low-pressure connector requirements

Low-pressure inlet tube diameters: 8 mm (5/16") or 9.5 mm (3/8").
Connectors shall comply with ISO 13948-2:2016 (type C) or SAE J2044. If SAE J2044 is used, bead radii must avoid sharp edges and ensure a minimum 0.25 mm annular flat for the female connector.

High-pressure connector requirements

High-pressure connections shall comply with ISO 18418-1 or ISO 2974.

Lubrication on assembly

Ensure the pump plunger and tappet are supplied with lube oil during assembly. If assembled top-down, provide a drain or evacuation feature to remove oil and debris.

Applications

Engine designers integrating a cam-driven high-pressure pump into cylinder heads.

Pump suppliers preparing mounting interfaces for OEM engines to achieve interchangeability.

Manufacturing and service teams needing clear dimensional references for assembly, inspection and maintenance.

Practical benefits: reduced rework at prototype and production stages, improved parts interchangeability, and clearer supplier–OEM agreements on interface design.

Related Standards

ISO 18418-1 - Medium pressure fuel supply connections (GDI)

ISO 2974 - 60° female cones for high-pressure injection components

ISO 13948-2:2016 - Low-pressure (push-on) connections

SAE J2044 - Quick connect coupling for liquid fuel systems

ISO 18418-2 and ISO 19724 - related fuel system assembly and cleanliness guidance

For implementation, refer to the full ISO 21042:2018 document and coordinate final dimensions and material suitability between pump suppliers and engine manufacturers.

ISO 21042:2018 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

ISO 13948-2:2016

Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 2: Non-threaded (push…

BS ISO 18418-1:2026

Gasoline engines. High pressure liquid fuel supply connections. 60° concave cone connectors.

ISO 2974:2016

Diesel engines — 60° female cones for high-pressure fuel injection components

BS ISO 18418-2:2022

Gasoline engines. High pressure liquid fuel supply connections. Pipe assemblies.

BS ISO 19724:2016

Gasoline engines with direct injection. Cleanliness assessment of fuel injection equipment