Detailed explanation of auto parts
1. Classification by production source of auto parts
Auto parts can be classified into three categories according to their production source: original equipment (OEM), aftermarket parts and self-made parts
(1) Original equipment: refers to the equipment parts that are matched with the vehicle manufacturer, such as pure brand parts that have passed the strict quality inspection of the automobile manufacturer. Their performance and quality can fully meet the vehicle requirements
(2) Aftermarket parts: refers to spare parts produced by professional spare parts manufacturers. Although they are not matched with the vehicle manufacturer and installed on new vehicles, they are produced according to the manufacturer's standards and meet the manufacturer's technical indicators
(3) Self-made parts: refers to spare parts produced by spare parts manufacturers based on their understanding of automobile spare parts standards. Their appearance and use effect are similar to qualified spare parts, but their technical indicators are guaranteed by the spare parts manufacturer. Whether the manufactured parts are qualified has nothing to do with the vehicle manufacturer.
Whether the self-made parts are qualified mainly depends on the spare parts manufacturer's production technology level and quality assurance measures.
All auto parts sold on the market, whether they are aftermarket or self-made, must pass quality inspection and meet national standards.
2. Classification by standardization
Auto parts are divided into five categories: engine parts, chassis parts, body and accessories parts, electrical and electronic products, and general parts.
According to the terminology and definition of automobiles, parts include assemblies, sub-assemblies, sub-assemblies, units, and parts.
(1) Assembly: A combination of several parts, several sub-assemblies, or any combination of them to form a certain assembly level or a certain functional form. The part with assembly decomposition characteristics is the assembly.
(2) Sub-assembly: A part that is composed of two or more parts and sub-assemblies combined by assembly processes and has a subordinate assembly level relationship to the assembly is a sub-assembly.
(3) Subassembly: A part that is composed of two or more parts through an assembly process or combination and has a subordinate assembly level relationship with a subassembly is a subassembly
(4) Unit: A functional combination with a certain functional characteristic composed of any combination of parts. Usually, the part that can work independently in different environments is a unit.
(5) Part: A single finished product or a single component that is not made through an assembly process, or a component that is composed of two or more parts connected together with a specified function and usually cannot be decomposed is a part.
3. Classification by the system to which auto parts belong
According to different systems, auto parts are divided into engine system, transmission system, steering system, cooling system, brake system, suspension system, intake and exhaust system, body and accessories, interior parts and accessories, heating and air conditioning system, electrical system, vehicle accessories, etc.
