GB 17691-2005 English PDF

GB 17691-2005: Limits and measurement methods for exhaust pollutants from compression ignition and gas fuelled positive ignition engines of vehicles (III, IV, V)
Delivery: 9 seconds. Download (and Email) true-PDF + Invoice.
Newer version: (Replacing this standard) GB 17691-2018
Get Quotation: Click GB 17691-2005 (Self-service in 1-minute)
Historical versions (Master-website): GB 17691-2018
Preview True-PDF (Reload/Scroll-down if blank)


ICS 13.040.50
Z 64
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
GB 17691-2005
Replace of GB 17691-2001
Replace of part of GB 14762-2002
Limits and measurement methods for exhaust
pollutants from compression ignition and gas
fueled positive ignition engines of vehicles (III, IV, V)
Issued on May 30, 2005 Implemented on January 1, 2007
Jointly issued by State General Administration of Quality Supervision, Inspection
and Quarantine of the people's Republic of China and ministry of
Environmental Protection of the people's Republic of China
GB 17691-2005
National Standard of the People's Republic of China
Limits and Measurement Methods for Exhaust Pollutants
from Compression Ignition and Gas Fuelled Positive Ignition Engines of
Vehicles (III, IV, V)
Replace of GB 17691-2001
Replace of part of GB 14762-2002
1. SCOPE
This standard stipulates limits and measurement method for gaseous and particulate pollutants
from exhaust gas of compression ignition (C.I.) engines for road vehicle use and vehicles
equipped with C.I. engines, and for gaseous pollutants from motor vehicles equipped with
positive ignition engines fuelled with natural gas (NG) or liquefied petroleum gas (LPG) and
such engines.
This standard applies to the C.I. engines (including positive ignition engines fuelled with gaseous
fuel) used for driving motor vehicles of categories of M2, M3, N1, N2 and N3 having a design
speed exceeding 25 km/h and vehicles of categories M1 having a total mass exceeding 3500 kg,
and to the type approval, the inspection of conformity of production and the inspection of
conformity of in-service vehicles.
This standard dose not apply to the C.I. engines used by category N1 and M2 power−driven
vehicles which are approved according to GB 18352.3-2005 Limits and measurement methods
for emissions from light-duty vehicles (III, IV).
2. NORMATIVE REFERENCE
The following standards contain provisions, which, through reference in this text, constitute
provisions of this standard. For undated references, the latest edition of the document referred to
applies.
GB/T 15089-1994 Motor Vehicles and Trailers—Classification
GB/T 17692 Measurement Methods of Net Power for Automotive Engines
GB 18047 Automotive Compressed Natural Gas
GB 18352.3-2005 Limits and measurement methods for emissions from light-duty vehicles (III,
IV)
GB/T19147 Automotive Diesel
GB19159 Automotive Liquefied Petroleum Gas
3. TERMS AND DEFINITIONS
For the purposes of this Standard, following terms and definitions apply:
3.1 exhaust pollutants
mainly include gaseous pollutants and particulate matters.
GB 17691-2005
14
5.3.1 With the exception of the case mentioned in paragraph 5.3.2, the approval of a parent engine shall
be extended to all family members without further testing, for any fuel composition within the
range for which the parent engine has been approved (in the case of engines described in
paragraph 5.2.2) or the same range of fuels (in the case of engines described in either paragraphs
5.1 or 5.2) for which the parent engine has been approved.
5.3.2 Secondary test engine
In case of an application for type-approval of an engine, or a vehicle in respect of its engine, that
engine belonging to an engine family, if the technical service determines that, with regard to the
selected parent engine the submitted application does not fully represent the engine family
defined in Annex AB, an alternative and if necessary an additional reference test engine may be
selected by the technical service and tested.
6 ENGINE MARKINGS
6.1 The engine approved as a technical unit must bear:
6.1.1 the name, type and trademark of the engine
6.1.2 the name of the manufacturer of the engine
6.1.3 the type approval number
6.1.4 in case of an NG engine, one of the following markings to be placed after the type approval
number:
--H in case of engine being approved and calibrated for the H-range of gases;
--L in case of engine being approved and calibrated for the L-range of gases;
--HL in case of engine being approved and calibrated for both the H-range and L-range gases;
--Ht in case of engine being approved and calibrated for a specific gas composition in the
H-range of gases and transformable to another specific gas in the H-range of gases by fine tuning
of the engine fuelling;
--Lt in case of engine being approved and calibrated for a specific gas composition in the L-range
of gases and transformable to another specific gas in the L-range of gases after fine tuning of the
engine fuelling;
--HLt in case of engine being approved and calibrated for a specific gas composition in either the
H-range or the L-range of gases and transformable to another specific gas in either the H-range or
the L-range of gases by fine tuning of the engine fuelling.
6.1.5 Labels
In the case of NG and LPG fuelled engines with fuel range restricted type approval, the following
labels are applicable:
6.1.5.1 Content1):
1) If lack of space attaches such labeling, a simplified code may be used. In this event, explanatory notes containing all the
following information must be easily accessible to any person filling the fuel tank or performing maintenance or repair on the
engine and its accessories, as well as to the authorities concerned. The site and content of these explanatory notes will be
GB 17691-2005
15
The following information must be given:
in the case of paragraph 5.2.1.3, the label shall state “ONLY FOR USE WITH NATURAL GAS
RANGE H”. If applicable, “H” is replaced by “L”.
in the case of paragraph 5.2.2.3, the label shall state “ONLY FOR USE WITH NATURAL GAS
SPECIFICATION…”, or “ONLY FOR USE WITH LIQUEFIED PETROLEUM GAS
SPECIFICATION…”, as applicable.
The letters and figures must be at least 4mm in height.
6.1.5.2 Properties
Labels must be durable for the useful life of the engine. Labels must be clearly legible and their
letters and figures must be indelible. Additionally, labels must be attached in a manner that their
fixing is durable for the useful life of the engine, and the labels cannot be removed without
destroying or defacing them.
6.1.5.3 Placing
Labels must be secured to an engine part necessary for normal engine operation and not normally
requiring replacement during engine life. Additionally, these labels must be located so as to
readily visible to the average person after the engine has been completed with all the auxiliaries
necessary for engine operation.
6.2 In case of an application for type approval for a vehicle type in respect of its engine and for a
vehicle type with an approved engine, the marking specified in paragraph 6.1.5 shall also be
placed close to the fuelling aperture.
7 SPECIFICATIONS ANT TESTS
7.1 General
7.1.1 Emission control equipment
The components liable to affect the emission of gaseous and particulate pollutants from diesel
engines and the emission of gaseous pollutants from gas engines shall be so designed,
constructed, assembled and installed as to enable the engine, in normal use, to comply with the
provisions of this standard.
7.1.2 Functions of emission control equipment
7.1.2.1 The use of a defeat device and an irrational emission control strategy is forbidden.
7.1.2.2 An auxiliary control device may be installed to an engine, or on a vehicle, provided that the
device:
--operates only outside the conditions specified in paragraph 7.1.2.4;
-- is activated only temporarily under the conditions specified in paragraph 7.1.2.4 for such
purposes as engine damage protection, air-handling device protection, smoke management, cold
start or warming-up;
--is activated only by on-board signals for purposes such as operational safety and limp-home
determined by agreement between the manufacturer and the approval authority.
GB 17691-2005
16
strategies.
7.1.2.3 An engine control device, function, system or measure that operates during the conditions
specified in section 7.1.2.4 and which results in the use of a different or modified engine control
strategy to that normally employed during the applicable emission test cycles will be permitted if,
in complying with the requirements of sections 7.1.3 or 7.1.4, it is fully demonstrated that the
measure does not reduce the effectiveness of the emission control system. In all other cases, such
devices shall be considered to be a defeat device.
7.1.2.4 For the purposes of paragraph 7.1.2.2, the defined conditions of use under steady state and
transient conditions (1) are:
— an altitude not exceeding 1 000 meters (or equivalent atmospheric pressure of 90 kPa);
— an ambient temperature within the range 283 to 303 K (10 to 30 °C),
— engine coolant temperature within the range 343 to 368 K (70 to 95 °C).
7.1.3 Special requirements for electronic emission control systems
Documentation requirements
The manufacturer shall provide a documentation package that gives access to the basic design of
the system and the means by which it controls its output variables, whether that control is direct
or indirect.
The documentation shall be made available in two parts:
(a) the formal documentation package, which shall be supplied to the technical service at the time
of submission of the type-approval application, shall include a full description of the system. This
documentation may be brief, provided that it exhibits evidence that all outputs permitted by a
matrix obtained from the range of control of the individual unit inputs have been identified. This
information shall be attached to the documentation required in paragraph 4;
(b) additional material that shows the parameters that are modified by any auxiliary control
device and the boundary conditions under which the device operates. The additional material
shall include a description of the fuel system control logic, timing strategies and switch points
during all modes of operation.
The additional material shall also contain a justification for the use of any auxiliary control
device and include additional material and test data to demonstrate the effect on exhaust
emissions of any auxiliary control device installed to the engine or on the vehicle.
This additional material shall remain strictly confidential and be retained by the manufacturer,
but be made open for inspection at the time of type-approval or at any time during the validity of
the type-approval.
7.1.4 To verify whether any strategy or measure should be considered a defeat device or an irrational
emission control strategy according to the definitions given in paragraphs 3.30 and 3.32, the
type-approval authority and the technical service may additionally request a NOx screening test
using the ETC which may be carried out in combination with either the type-approval test or the
procedures for checking the conformity of production.
7.1.4.1 As an alternative to the requirements of Annex BD to this standard, the emissions of NOx during
GB 17691-2005
17
the ETC screening test may be sampled using the raw exhaust gas and the technical prescriptions
of ISO DIS 16183, dated 15 October 2000, shall be followed.
7.1.4.2 In verifying whether any strategy or measure should be considered a defeat device or an irrational
emission control strategy according to the definitions given in paragraphs 3.30 and 3.32, an
additional margin of 10 %, related to the appropriate NOx limit value, shall be accepted.
7.1.5 Transitional provisions for extension of type approval
7.1.5.1 This paragraph shall only be applicable to new compression-ignition engines and new vehicles
propelled by a compression-ignition engine that have been type-approved to the stage III
requirements of the tables in paragraph 7.2.1.
7.1.5.2 As an alternative to paragraphs 7.1.3 and 7.1.4, the manufacturer may present to the technical
service the results of a NOx screening test using the ETC on the engine conforming to the
characteristics of the parent engine described in Annex A, and taking into account the provisions
of paragraphs 7.1.4.1 and 7.1.4.2.
The manufacturer shall also provide a written statement that the engine does not employ any
defeat device or irrational emission control strategy as defined in paragraph 2 of this standard.
7.1.5.3 The manufacturer shall also provide a written statement that the results of the NOx screening test
and the declaration for the parent engine, as referred to in paragraph 7.1.4, are also applicable to
all engine types within the engine family described in Annex A.
7.2 Specifications concerning the emission of gaseous and particulate pollutants and smoke
Diesel engine:
For type approval to stage III requirements of the tables in paragraph 7.2.1, the emissions shall be
determined on the ESC and ELR tests with conventional diesel engines, including those fitted
with electronic fuel injection equipment, exhaust gas recirculation (EGR), and/or oxidation
catalysis. Diesel engines fitted with advanced exhaust aftertreatment systems including NOx
catalysis and/or particulate traps, shall be additionally tested on ETC test.
For type approval testing to either stage IV and stage V requirements of the tables in paragraph
7.2.1 or EEV test, the emissions shall be determined on the ESC, ELR and ETC tests.
Gas engine:
For gas engines, the gaseous emissions shall be determined on the ETC test.
The ESC and ELR test procedures are described in Annex BA, the ETC test procedure is
determined in Annex BB and Annex BC.
The emissions of gaseous pollutants, particulates and smoke by the engine submitted for testing
shall be measured by the methods described in Annex BD. Annex D describes the recommended
analytical systems for the gaseous pollutants, the recommended particulate sampling systems,
and the recommended smoke measurement system.
Other systems or analyzers may be approved by the technical service if it is found that they yield
equivalent results on the respective test cycle. The determination of system equivalency shall be
based upon a 7 sample pair (or larger) correlation study between the system under consideration
and one o...