This part specifies the parameters used to determine the technical specifications of the engine group and select the parent engine of the group. This part applies to stationary engines and marine auxiliary engines that may need to be modified or adjusted to adapt to the conditions of field use. GB/T 8190.8-2003 Emission measurement of reciprocating internal combustion engines Part 8: Determination of engine group GB/T8190.8-2003 standard download decompression password: www.bzxz.net

GB/T8190.8-2003/IS08178.8:1996 (issued on April 15, 2003, implemented on September 1, 2003) Foreword
This part of GB/T8190 is equivalent to IS08178-8:1996 "Emission measurement of reciprocating internal combustion engines Part 8: Determination of engine series" and the writing format is basically consistent with GB/T1.1-2000 "Guidelines for standardization work Part 1: Structure and writing rules of standards". GB/T8190, under the general title of "Emission Measurement of Reciprocating Internal Combustion Engines", consists of the following parts: - Part 1: Test bench measurement of gaseous and particulate emissions; - Part 2: Field measurement of gaseous and particulate emissions; - Part 3: Definition and measurement method of exhaust smoke density under steady-state conditions; - Part 4: Test cycles for engines of different purposes; - Part 5: Test fuels;
Part 6: Test report;
- Part 7: Determination of engine families; - Part 8: Determination of engine groups; - Part 9: Test bench measurement of exhaust smoke density for engines used in non-road mobile machinery. This part was proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Standardization of Internal Combustion Engines. Drafting units of this part: Shanghai Internal Combustion Engine Research Institute, Shanghai Diesel Engine Co., Ltd. The main drafters of this part are: Zhai Junming, Song Guochan, Chen Linshan, Zhuang Guogang. Introduction
Different from road engines, non-road engines have a very wide power range, a variety of structural forms, and can be used in many different occasions. The purpose of GB/T8190 is to rationalize the test methods for non-road engines so that regulations can be drafted, engines of various specifications can be developed and engines can be certified simply, economically and effectively to control engine gas and particulate emissions. In order to achieve these goals, GB/T8190 includes four concepts: a) Classification by engine use to reduce the number of test cycles, see GB/T8190.4: b) Use measured effective power to express specific emissions, see GB/T8190.1: c) Use the concept of "engine family" so that engines with similar emission characteristics and structures can be represented by an engine in the family; d) Use the concept of "engine group" to explain: 1) Engines can be adjusted or modified on the test bench; 2) Engines of basically the same form or model can be classified into one category, even if the engine needs to be adjusted or modified after the test bench measurement; 3) The adjusted or modified engine must comply with the applicable emission limits. The parameters of the specified engine group are more stringent than the parameters of the specified engine family.
The concept of engine groups is generally applicable to both large and small series production engines. The concept also has the potential to reduce the number of engines that require certification testing for modifications during production or use. 1 Scope
Emission measurement for reciprocating internal combustion engines
Part 8: Determination of engine groups
GB/T8190.8-2003/IS08178.8:1994 This part of GB/T8190 specifies the parameters used to determine the technical specifications of engine groups and to select the parent engine of the group. This part applies to stationary engines and marine auxiliary engines that may need to be modified or adjusted to adapt to field conditions. 2 Normative references
The provisions of the following documents become the provisions of this part through reference to this part of GB/T8190. For any dated referenced document, all subsequent amendments (excluding errata) or revisions do not apply to this part, however, parties to agreements based on this part are encouraged to investigate whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this part. GB/T8190.4-1999 Emission measurement for reciprocating internal combustion engines Part 4: Test cycles for engines for different purposes (IDT IS08178-4: 1996) GB/T8190.7-2003 Emission measurement for reciprocating internal combustion engines Part 7: Determination of engine families (IS08178-7: 1996, IDT) 3 Terms and definitions
This part of GB/T8190 uses the following definitions. 3.1 Engine group enginegroup
A class of engines that require adjustment or modification after test bench measurement to ensure that they meet the emission and performance requirements on site Note: An engine group is a class of engines with stricter restrictions than the engine family specified in GB/T8190.7. The determination of the group and the selection of the parent engine shall be agreed upon by the parties concerned. 3.2 Parent engine
An engine that is representative of the emission performance of an engine series (see Chapter 7) agreed upon by the parties concerned. 4 General
Some engines, mainly marine and stationary engines, require modification or adjustment to adapt to the conditions of use in the field. In such cases, the parties concerned may agree to select a group of engines with limited basic characteristics and specifications for limited modification and adjustment. The selection procedure for the parent engine should preferably be such that the selected engine has those characteristics that have an adverse effect on the emission of the relevant exhaust components. On the other hand, the procedure must be adapted to the production volume of the engine manufacturer. Therefore, the parent engine may be the first prototype in a product series, or in some cases a test engine related to it. The determination of the engine series and the selection of the parent engine should be agreed upon by the parties concerned. 5 Parameters for determining the engine series
The engine series can be determined by the basic characteristics and specifications common to the engines in the series. The engine manufacturer shall be responsible for describing the engines included in each series in its product series, and this shall be agreed upon by the parties concerned. In order to identify engines as belonging to the same series, they must have the following characteristics and specifications in common. a) Combustion cycle:
-two stroke:
-four stroke.
b) Cooling medium:
air:
-engine oil.
c) Cylinder:
bore:
stroke.
d) Maximum rated power per cylinder at maximum rated speed: the manufacturer shall indicate the range of allowable reduction in engine power within the group, and it shall be agreed by all parties concerned. e) Intake method:
1) Non-supercharged:
2) Supercharged:
Constant pressure;
-pulse system.
f) Supercharged intercooling method:
with/without intercooler:
-intercooler stage number.
g) Fuel type:
Diesel;
Gasoline; bzxZ.net
Combustible gas:
Alcohol;
Other fuels.
h) Combustion chamber type:
Open type:
Separated type.
i) Valve and airway (structural arrangement, size and quantity): Cylinder head;
Cylinder liner:
Crankcase.
i) Fuel system type:
1) For fuel only
Combined pump-pipe-nozzle system:
In-line pump;
Distribution pump;
Monomeric pump:
Pump nozzle:
Gas valve;
Throttle section injection:
2) Fuel and air:
3) Carburetor.
k) Other features:
1) Exhaust gas recirculation:
2) Emulsion or water injection;
3) Air injection:
4) Turbocharger intercooler system:
5) Exhaust aftertreatment:
-Oxidation catalyst;
Reduction catalyst:
Thermal reactor:
Particulate filter;
6) Dual fuel:
7) Ignition type:
Compression:
Ignition;
Glow plug.
6 Criteria for adjustments or modifications within the engine group 6.1 Conditions for adjustments and modifications
With the agreement of the parties concerned, minor adjustments and modifications to the engine within the engine group are allowed after certification (type test) or final measurement on the test bench. a) If the on-site measurement confirms that the adjusted or modified engine can meet the applicable emission limits. With the consent of all parties concerned, different test conditions and different test points may be selected in accordance with the requirements of GB/T8190.4 during on-site measurement, if such adjustment or modification complies with the provisions of the engine group b) If the information provided by the engine manufacturer confirms that the adjusted and modified engine can meet the applicable emission limits. 6.2 Examples of adjustments and modifications
a) Minor adjustments required to adapt to site conditions: Adjustment of injection timing to compensate for different fuel properties; Adjustment of injection timing to optimize maximum cylinder pressure; Adjustment of fuel supply uniformity in each cylinder;
Adjustment of other features listed in 5k).
b) Minor modifications required to optimize performance:
1) Modification of turbocharger;
2) Modification of injection pump components:
-Plunger specifications;
-Outlet valve specifications:
3) Modification of injection nozzles;
4) Modification of cam profile:
Intake valve and/or exhaust valve:
Injection pump cam:
5) Modification of combustion chamber:
6) Modification of other features listed in 5k).
7 Parent engine selection criteria
Sometimes it is not always possible to select the parent engine for small-batch production engines in the same way as for mass-produced engines. Therefore, the manufacturer should state how to select the parent engine to represent the engine family, and it must be agreed upon by all parties concerned. Note: The selection criteria applicable to the engine family are described in Chapter 5 of GB/T8190.7-2003.
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