GB/T 725-2008Internal combustion engines - Nomenclature and code of designations (English PDF)

4.1 General

4.1.1

The internal combustion engine model by the Arabic numerals (hereinafter referred to as digital), the Chinese phonetic alphabet or international common abbreviated English alphabet (hereinafter

Said the letter) Composition 4.1.2 Model preparation should be preferred in Table 1, Table 2, Table 3 letters, allowing manufacturers to choose other letter is necessary, but not with

Table 1, Table 2, Table 3 letters repeat. Overlapping symbols used, but should be represented in Figure 1 sequence.

4.1.3

should be concise model of the internal combustion engine, the second part of the provisions of the symbol must be represented, but the first part of the third part and the fourth part symbol Yun

Xu manufacturers increase or decrease depending on the circumstances, the same product type should be consistent, not free to change.

4.1.4

by the internal combustion engine imported products allowed to keep the original product or extend the original model based on the model. After the localization of products

Should be in accordance with the standard provisions.

4.2 Model composition

4.2.1

The internal combustion engine model includes the following four parts showing the method shown in Figure 1.

4.2.2 The first part

the manufacturer code or series of symbols. This part of the code by the manufacturer to select the appropriate word 1 to 3 as needed

Female representation.

4.2.3 The second part

the number of cylinders, cylinder layout pattern sign stroke symbol type, bore symbols.

a) number of cylinders indicated by 1 to 2 digits;

b) the cylinders are arranged according to type of symbol specified in Table 1;

c) when the four-stroke cycle type of symbol is omitted, the two-stroke is represented by E;

d) Bore Symbol Bore general use or Bore/Stroke numerals should be available for engine displacement or power numbers. The unit by the system

Custom manufacturer.