The narrow sense of standard parts, what is called standard parts

Copy definition of the standard part:

1. Standard parts refer to the structure, size, drawing method, marking and other aspects have been completely standardized, and are produced by professional factories of commonly used parts (parts), such as threaded parts, keys, pins, rolling bearings, etc.

2. In a broad sense, it includes standardized fasteners, couplings, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts.

3. In the narrow sense, only standardized fasteners are included. The standard parts commonly known in China are the abbreviation of standard fasteners, which is a narrow concept, but the existence of a broad concept cannot be ruled out. In addition, there are also industry standard parts, such as automotive standard parts, mold standard parts, etc., which also belong to generalized standard parts.

Yongnian Zhongxingfu Standard Parts Manufacturing Company is located in Yongnian County Standard Parts Industrial Zone, China, since its establishment, the company has always adhered to the premise of high-quality service, customer concept as the center, to provide customers with reasonable and high-quality products. All of the company's products are produced with state-of-the-art equipment and unique technology. Ensure a wide range of products with consistent quality.

Main products: drywall nails, belt bolts, belt buckles, U-shaped wires, rivets, iron rivets, carriage bolts, drill tail wires, pear tip wires, bridge wires, bucket wires, all kinds of special-shaped parts and non-standard products customized to drawings and samples according to customer requirements.

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Standard parts are parts produced in accordance with national standards (GB), industry standards, or foreign standards, mainly for the convenience of maintenance and replacement.

capacity, such as screws, keys, flanges, bearings, etc. are standard parts, which can be directly purchased from the market when designing, without the need for special separate production, which reduces the cost and improves labor efficiency.

Non-standard parts are those parts that cannot be purchased directly from the market and must be customized by contacting specialized manufacturers. Of course, the cost is relatively high, and the maintenance is more troublesome, and generally try not to use non-standard parts. There are also some parts that do not have a unified standard at present, and cannot form a standard, such as gears and pulleys.

It must be processed separately.

The mixture is too thin, which means that there is less fuel in the mixed gas and more air BAI gas, which means that the DU air-fuel ratio is too large, usually.

The ideal DAO air-fuel ratio is: 1, which is expressed as Lambda =1 in the process of calibration, and the actual vehicle under closed-loop control is about >.

In the calibration process, the control of the injection volume is calculated according to the intake volume, and after the map is formed, it is executed according to the pre-calibration procedure and fine-tuned according to the strategy.

Now your car is showing an error, which proves that the engine has behaved outside of what was designed. That is, there is air outside the predetermined air entering the intake manifold, or the amount of fuel injected is insufficient.

Therefore it is recommended that you:

1. Start with the air intake system, especially check whether there is leakage in the air intake system parts behind the throttle valve body.

2. Whether the injector is blocked.

Standard parts refer to the structure, size, drawing method, marking and other aspects have been completely standardized, and are commonly used by professional factories to produce common parts (parts).

For example, threaded parts, keys, pins, rolling bearings, etc. are all standard parts.

Mechanical parts and components with a high degree of standardization and strong industry versatility are also known as universal parts. Broad standard parts include fasteners, couplings, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs, etc., all of which have corresponding national standards and have strong cross-industry versatility.

1. Assemblies and connecting pairs.

The standard parts of the assembly are used to combine, for example, a machine screw and a flat washer can be combined; The standard parts of the connecting pair are a special bolt, nut and washer for combined use, such as the hexagonal head bolt connection pair with high strength for the steel structure.

2. a washer. The washer is a kind of oblate annular standard part, which is generally installed between the bolt, screw or between the supporting surface of the nut and the surface of the connecting parts, which can increase the contact area of the connected parts, reduce the pressure in a certain area, and ensure that the connected parts will not be damaged; There is also an elastic washer that also prevents the nut from loosening.

3. There is also a standard part called "pin".

This kind of standard parts are generally used to locate parts, sometimes they can also be connected, fixed, and some can be used to transmit power or lock other fasteners.

4. Welding nails. There is also a standard part called a welding nail, which is made up of a nail rod and a nail head, and it is fixed to another part by welding to make them join together.

5. Rivets. This standard part has two parts, the head and the nail bar, and the two parts with through holes are connected and fastened, so that they become a whole. This connection method is called rivet connection, and sometimes it is directly called riveting.

This connection is not detachable, because if you want to separate the two parts, you must destroy the rivets on the parts.

All the items that need to correspond to the standard are standard parts, including fasteners, flanges, gaskets, bearings, pipeline accessories, steel pipes, etc., too much. For example, a fastener has: hexagon bolts, hexagon bolts, carriage bolts, expansion bolts, butt lock bolts, U-bolts, self-tapping screws, machine screws, set screws, studs, tooth strips, hexagon nuts, nylon nuts, metal lock nuts, square nuts, thin nuts, cap nuts, wing nuts, flange face nuts, rivet nuts, round nuts, eyebolt nuts, fancy nuts, flat washers, spring gaskets, retaining rings, snap rings, toothed washers, wave washers, non-standard washers, circlips, hinges, pins, round bars, wire screw sleeves, rivets, blind rivets Marine hardware standard parts, materials and non-standard parts and other related products; Pipe fittings include:

Valves, flanges, elbows, stainless steel pipes, etc.

Allen socket screws, washers, butterfly springs, nuts, etc.

Standardized fasteners are actually a kind of connectors, but because of a wide variety of applications, they are used in a single category, or even referred to as standard parts, and more detailed information can be found on the fastener industry network.