This part specifies the parameters used to determine the technical specifications of engine families and to select the parent engine. This part applies to reciprocating internal combustion engines for land, rail traction and marine use, but does not include motor vehicle engines used primarily as road vehicles. This part can also be used for engines that take off power and/or drive such as agricultural equipment, road construction and earth-moving machinery, industrial trucks, generator sets, etc. GB/T 8190.7-2003 Emission measurement for reciprocating internal combustion engines Part 7: Determination of engine families GB/T8190.7-2003 Standard download decompression password: www.bzxz.net

ICS13.040.50
National Standard of the People's Republic of China
GB/T 8190.7--2003/IS0 8178-7: 1996 Reciprocating internal combustion engines--Exhaust emissionmeasurement-Part 7 :Engine family determination(ISO 8178-7:1996,IDT)
Published on April 15, 2003
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on September 1, 2003
GB/T 8190.7-2003/1S0 8178-7: This part of 1996GB/T8190 is equivalent to ISO8178-7:1996 "Emission measurement of reciprocating internal combustion engines Part 7: Determination of engine families". 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 cycle for engines of different purposes; - Part 5: Test fuel;
- 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 of engines for non-road mobile machinery. This part was proposed by China Machinery Industry Federation. This part is under the jurisdiction of 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. Main drafters of this part: Qu Junming, Jiang Liqing, Song Guochan, Chen Linshan, Zhuang Guogang GB/T 8190.7—2003/IS0 8178-7:1996 Introduction
Unlike road engines, non-road engines have an extremely wide power output 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 developed, and engines certified simply, economically and effectively to control the gaseous and particulate emissions of engines. To achieve these goals, GB/T8190 includes four concepts: classification by engine use to reduce the number of test cycles, see GB/T8190.4; a) using measured effective power to express specific emissions, see GB/T8190.1; b) using the concept of "engine family" so that engines with similar emission characteristics and structures can be represented by one engine in the family; c) using the concept of "engine group" to explain the modification and adjustment of the engine (see GB/T8190.8). This part of GB/T8190 explains the concept of engine family. The concept of engine family has the potential to reduce the number of engines that must be submitted for type certification testing, and can also assure the relevant parties that all engines in the family meet the certification requirements. Scope GB/T 8190.7--2003/1S0 8178-7: 1996 Emission measurement of reciprocating internal combustion engines Part 7: Determination of engine families This part of GB/T 8190 specifies the parameters used to determine the technical specifications of engine families and select the parent engine. This part of GB/T 8190 applies to reciprocating internal combustion engines for land, railway traction and marine use, but does not include motor vehicle engines mainly used as road vehicles. This part can also be used for engines that take off power and/or drive such as agricultural equipment, road construction machinery and earth-moving machinery, industrial trucks, generator sets, etc. 2 Terms and definitions This part of GB/T 8190 uses the following definitions: 2.1 ||Engine familyenginefamily
A class of engines that the manufacturer is expected to have similar emission characteristics through its design. All engines in this family must comply with the applicable emission limits.
parentengine
An engine selected from the engine family to have those characteristics that have an adverse effect on the emissions of the relevant exhaust components. Note: It can be expected that this is an engine with higher emissions. 3 General
The manufacturer should provide a list and specifications of the engines that it considers to belong to the same family, and agree with the relevant parties on which one should be selected based on experimental and technical considerations ( The parent engine selection procedure should ensure that the selected engine has those characteristics that have an adverse effect on the emissions of the relevant exhaust components. The parties concerned should have the possibility to select a different engine for finalization or production consistency testing to ensure that the entire engine family can meet the requirements.
4 Parameters for determining engine families
Engine families can be determined by the basic characteristics common to the engines in the family. In some cases, the parameters will interact with each other. Therefore, these effects must also be considered to ensure that only engines with similar emission characteristics are included in the same engine family. For example, for some engines For some engines, the number of cylinders may be a relevant parameter due to the different aspiration methods or fuel systems used, but for other structures, the emission characteristics are independent of the number of cylinders or the structural arrangement. The engine manufacturer shall be responsible for specifying the engines included in the same family in its product line. In order to identify engines as belonging to the same family, they must have the following basic characteristics (but not technical specifications) in common. If some engines have other characteristics that are considered to affect emissions, these characteristics should be identified and taken into account when selecting the engines to be included in the family. a) Combustion cycle:
two-stroke;
one-four-stroke.
GB/T 8190.7—2003/IS0 8178-7: 1996 Cooling medium:
- air;
- water;
engine oil.
Single cylinder displacement: The single cylinder displacement of each engine has a deviation of ±15% (if the relevant parties agree, the deviation may be greater than ±15%). Number of cylinders and cylinder arrangement (applicable only to spark ignition engines). d)
Aspiration mode:
Non-supercharged;
Supercharged. bzxZ.net
Fuel type:
—Diesel;
—Gasoline;
Gas;
—Alcohol;
Other fuels.
Combustion chamber type:
Open;
—Separated.
Valve and airway (structural arrangement, size and quantity): h)
—Cylinder head:
Cylinder liner;
Crankcase.
Fuel system type:
For fuel only:
Combined pump-pipe-nozzle system;
In-line pump;
Distributor pump;
Monoblock pump;
Pump nozzle;
Gas valve;
-throttle section injection;
Fuel and air;
Carburetor.
i) Other features:
1) Exhaust gas recirculation;
Emulsion or water injection;
Air injection;
Turbocharger and intercooler system;
Exhaust aftertreatment:
Oxidation catalyst;
Reduction catalyst;
-Thermal reactor;
Particulate filter
6) Dual fuel;
7) Ignition type:
-Compression;
——-Ignition;
——Glow plug.
5 Selection criteria for mother engine
GB/T 8190.7—2003/IS0 8178-7: 1996 The following introduces two methods for selecting mother engines. The selected method should be agreed upon by the relevant parties. Method 1 is to select an engine whose characteristics and properties make it difficult to achieve low emissions based on experience. This method requires detailed knowledge of the engines in the family, but it can generally accurately select the high-emission engine (see 5.1). Method 2 is more arbitrary because it only considers the fuel supply rate of the engine at intermediate speed and rated speed. This method is relatively simple to implement, but it may result in the selected engine having emissions that are not as high as those selected by other methods (see 5.2). If necessary, alternative criteria may be formulated to select the parent engine after agreement among the parties concerned. 5.1 Method 1
The selection of the parent engine of the family according to emission control can be based on the engine having the most unfavorable characteristics in terms of comparative emissions [expressed in g/kW·h). It is also possible to select more than one engine to represent the family. The following characteristics may be considered to be unfavorable to emissions, but the combination of various basic characteristics in the engine specifications must be considered when selecting. The engine has injection or ignition timing adjustment independent of speed; a)
The engine has injection or ignition timing adjustment independent of load; The engine has the lowest maximum injection pressure;
The engine has the highest charge air temperature at the cylinder inlet; d)
The engine has the lowest charge air pressure at the cylinder inlet; e)
The engine has the fewest cylinders and the lowest rated power at the rated engine speed; g)
The engine has the lowest rated engine speed;
The engine has the lowest low-speed;
j) The engine has the fewest fuel injection points.
If the engines in the family have other variable characteristics that are believed to affect emissions, these characteristics should also be identified and taken into account in the selection of the parent engine.
5.2 Method 2
The parent engine of the family can be selected using the maximum fuel delivery per stroke at the maximum rated torque speed as the primary criterion. If there are two or more engines that meet this primary criterion, the parent engine should be selected based on the maximum fuel supply per stroke at rated speed as the second criterion.
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