This standard specifies the rules for formulating the names and models of carburetors for small gasoline engines. This standard applies to carburetors for small gasoline engines, and carburetors for other types of gasoline engines can also be implemented with reference. JB/T 6731.3-1993 Rules for compiling product names and models of carburetors for small gasoline engines JB/T6731.3-1993 Standard download and decompression password: www.bzxz.net

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Machinery Industry Standard of the People's Republic of China
JB/T6731.3-93
Carburetor for small gasoline engines
Product name and model Compilation Rules
Released on 1993-07-29
Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-01-01
Machinery of the People's Republic of China Industry standards
Carburetors for small gasoline engines
Product name and model compilation rules
1 Subject content and scope of application
This standard specifies carburetors for small gasoline engines Name and model compilation rules. JB/T 6731.393
This standard applies to carburetors for small gasoline engines. Carburetors for other types of gasoline engines can also be implemented with reference. 2 Model compilation rules
2.1 The Chinese characters of the carburetor model are the first letter of Chinese Pinyin, and the numbers are Arabic numerals. 2.2 The carburetor model consists of the following three parts. 2.2.1 Header: carburetor structure type symbol, all expressed by letters. 2.2.2 Middle part: The outlet size symbol of the carburetor mixing chamber, expressed in numbers. 2.2.3 Tail: carburetor installation method, series symbol and sequence number of the same variant. The first two are represented by letters, and the latter are represented by numbers. The order of carburetor models is stipulated as follows: 2.2.4
000000
Use numbers to indicate the sequence number of the same variant
series symbols, without symbols to indicate prototypes, use ABC, D, ...Indicates the sequence of modifications
Installation mode model: J represents clamping type, D represents hanging type, no symbol represents flange type
Mixing chamber outlet size: Use mixing chamber outlet The diameter is expressed in millimeters, only integers are taken
Throat type symbol: Z represents plunger type, D represents equal vacuum type, and represents gate type. There is no symbol to represent fixed throat type. Air flow direction symbol: Use S means up-suction type, P means flat-suction type, no symbol means down-suction type
Carburetor type symbol, M means chip type, no symbol means float type
3 carburetor model Example
3.1 diaphragm type, flat suction, fixed throat type, mixing chamber outlet diameter is 20mm, flange type installation, prototype carburetor marked: MP20 carburetor
3.2 float Chamber type, flat suction, plunger type, mixing chamber outlet diameter is 14mm, clamping type installation, the first variant carburetor is marked: PZ14JA type carburetor
3.3 float chamber type, flat suction, Equal vacuum type, mixing chamber outlet diameter is 36mm, clamping type installation, prototype carburetor marked: PD36J carburetor
3.4 ??float chamber type, upper suction, fixed throat type, mixing chamber outlet diameter It is 24mm, flange-type installation, and the prototype carburetor is marked: S24 carburetor
3.5 float chamber type, downdraft, fixed throat type, mixing chamber outlet diameter is 30mm, flange-type installation, The carburetor with the first variant and variant series membrane number 1 is marked as
Approved by the Ministry of Machinery Industry on 1993-07-29
Implemented on 1994-01-01
1|| tt||30A1 type carburetor
JB/T6731.3-93
3.6 float chamber type, flat suction, plunger type, mixing chamber outlet diameter is 8mm, hoisting installation, prototype The carburetor is marked: PZ8D carburetor | |tt||Additional notes:
This standard is proposed and managed by the Sekijin Internal Combustion Engine Research Institute. This standard is drafted by Tianjin Internal Combustion Engine Research Institute, and the main drafter of this standard is Lou Shouhua.
Since the implementation of this standard, NI438-86% small gasoline engine carburetor product name and model compilation rules are invalid.
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