ISO 8984-2:1993 PDF

Diesel engines — Testing of fuel injectors — Part 2: Test methods

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Title (English):

ISO 8984-2:1993

Diesel engines — Testing of fuel injectors — Part 2: Test methods

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 3
Publication date:: December 16, 1993
Edition:: ISO IS 8984 edition 2 version 1
ICS:: 43.060.40

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Description (English):

Specifies tests which may be performed on fuel injectors for diesel engines (requiring fuel delivery of up to 300 mm^3/(injection × cylinder) at full load) using hand-lever-operated testing and setting apparatus, as specified in ISO 8984-1. These tests are: nozzle opening pressure, chatter (atomization), spray pattern, seat leakage, back-leakage.

Technical details

Technical committee: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
SKU: ISO 8984-2:1993

Abstract

Overview

ISO 8984-2:1993 defines standardized test methods for fuel injectors used in diesel (compression-ignition) engines. It applies to injectors requiring fuel delivery up to 300 mm3/(injection × cylinder) at full load and is intended for use with the hand-lever-operated testing and setting apparatus specified in ISO 8984-1. The part focuses on repeatable bench tests to assess injector performance and leakage characteristics under controlled conditions.

Key topics and requirements

Scope and test apparatus
- Tests are carried out using hand-lever-operated apparatus conforming to ISO 8984-1.
- Calibration fluid shall conform to ISO 4113.
- Operating fluid temperature: 23 °C ± 5 °C (seek manufacturer guidance if outside this range).
- Injector-to-apparatus adaptor: specified by the injector manufacturer.
Specified tests (may be performed as required by manufacturer)
- Nozzle opening pressure - point at which fluid emits from the nozzle tip; monitor pressure rise and/or drop.
- Chatter (atomization) - assessed by sound, visual observation of spray, and feel of the operating handle.
- Spray pattern - observed by rapidly depressing the handle and compared to manufacturer specifications (do not assess during some other tests).
- Seat leakage - after verifying nozzle opening pressure, raise pressure (typically to 2 MPa / 20 bar below recorded nozzle opening pressure), hold and check that no drops separate from the tip after 10 s. Additional rules apply for calibrating injectors per ISO 4008-3.
- Back-leakage - flush injector, raise to a predetermined pressure PA, release handle and measure pressure decay time between Ps and Pc. Parameters PA/PB/PC and acceptable leakage rates reference ISO 4008-3; PA ≥ 0.5 MPa and Ps at least 2.5 MPa below nozzle opening pressure; PB and PC are referenced as 3 MPa (30 bar) where specified.

Practical applications and users

Injector manufacturers: type approval, production QC and diagnostic procedures.
OEMs and test laboratories: bench testing, component validation and supplier audits.
Service and repair workshops: diagnostic bench checks and setting of injectors when matching manufacturer procedures.
Regulatory/standards bodies and research organizations that require consistent, repeatable injector performance data.

Related standards

ISO 8984-1: Hand-lever-operated testing and setting apparatus
ISO 4113: Calibration fluid for diesel injection equipment
ISO 4008-3: Fuel injection pump testing - application and test procedures
ISO 7440-1: Calibrating nozzle and holder assemblies

Keywords: ISO 8984-2:1993, diesel engines, fuel injector testing, nozzle opening pressure, chatter, spray pattern, seat leakage, back-leakage, hand-lever-operated testing.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Scope and test apparatus
- Tests are carried out using hand-lever-operated apparatus conforming to ISO 8984-1.
- Calibration fluid shall conform to ISO 4113.
- Operating fluid temperature: 23 °C ± 5 °C (seek manufacturer guidance if outside this range).
- Injector-to-apparatus adaptor: specified by the injector manufacturer.
Specified tests (may be performed as required by manufacturer)
- Nozzle opening pressure - point at which fluid emits from the nozzle tip; monitor pressure rise and/or drop.
- Chatter (atomization) - assessed by sound, visual observation of spray, and feel of the operating handle.
- Spray pattern - observed by rapidly depressing the handle and compared to manufacturer specifications (do not assess during some other tests).
- Seat leakage - after verifying nozzle opening pressure, raise pressure (typically to 2 MPa / 20 bar below recorded nozzle opening pressure), hold and check that no drops separate from the tip after 10 s. Additional rules apply for calibrating injectors per ISO 4008-3.
- Back-leakage - flush injector, raise to a predetermined pressure PA, release handle and measure pressure decay time between Ps and Pc. Parameters PA/PB/PC and acceptable leakage rates reference ISO 4008-3; PA ≥ 0.5 MPa and Ps at least 2.5 MPa below nozzle opening pressure; PB and PC are referenced as 3 MPa (30 bar) where specified.

Practical applications and users

Injector manufacturers: type approval, production QC and diagnostic procedures.
OEMs and test laboratories: bench testing, component validation and supplier audits.
Service and repair workshops: diagnostic bench checks and setting of injectors when matching manufacturer procedures.
Regulatory/standards bodies and research organizations that require consistent, repeatable injector performance data.

Related standards

ISO 8984-1: Hand-lever-operated testing and setting apparatus
ISO 4113: Calibration fluid for diesel injection equipment
ISO 4008-3: Fuel injection pump testing - application and test procedures
ISO 7440-1: Calibrating nozzle and holder assemblies

Keywords: ISO 8984-2:1993, diesel engines, fuel injector testing, nozzle opening pressure, chatter, spray pattern, seat leakage, back-leakage, hand-lever-operated testing.

ISO 8984-2:1993 PDF

Technical details

Abstract

Overview

Key topics and requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Practical applications and users

Related standards

Related standards

Road vehicles — Testing of fuel injectors for compression-ignition engines — Part 1: Hand-lever-operated test…

Road vehicles — Calibration fluid for diesel injection equipment

Road vehicles — Fuel injection pump testing — Part 3: Application and test procedures — Amendment 1

Road vehicles — Fuel injection equipment testing — Part 1: Calibrating nozzle and holder assemblies