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Found 6 results

  1. The significance of automotive parts repair is to repair old and waste, reduce the consumption of new parts, thereby saving raw materials, energy and manpower for manufacturing parts. The damage of automobile parts mainly includes four types: deformation, fracture, corrosion and wear. The first three types of damage are usually repaired by cold working, hot working or gluing. If the general parts deformation can be cold-pressed or hot-pressed after correction for mechanical repair; shaft parts can be broken by inlaying, welding, forging and other methods to repair; cylinder block water jacket cracks can be repaired by welding, riveting or adhesive methods. Parts wear is the most common damage. Parts that have not worn out beyond the specified repair size are processed according to repair size. Parts that have worn out beyond the repair size are repaired by surfacing, spraying, electroplating and other metal covering processes and adhesive methods. Automatic surfacing is to install parts on the surfacing machine and turn them on side. Commonly used automatic surfacing has three technologies: vibration surfacing, carbon dioxide protection welding and submerged arc welding. Carbon dioxide protection welding is carried out under the covering of carbon dioxide gas. Because carbon dioxide can react with carbon in molten iron to form carbon monoxide at high arc temperature, some carbon monoxide gases escaped from molten iron pool and become pores in the welding layer, thus affecting the surfacing quality. Therefore, in order to reduce the porosity, carbon dioxide shielded welding mostly uses special low-carbon manganese-silicon alloy steel wire with low carbon content and sufficient deoxidizer. The wire diameter is 0.4-0.6 mm. The surfacing layer has high strength, few pores and no cracks, but the hardness is low. This method is suitable for repairing cab, leaf plate and other thin plate parts.
  2. Failure concept The failure of automobile parts to lose the functions specified in the original design is called failure. Failure refers not only to the complete loss of original functions, but also to functional degradation and serious damage or hidden dangers, continued use will lose reliability and safety components. Basic form of failure Classification of failure according to failure mode and failure mechanism is an important part of failure study. Automobile parts can be classified into five types according to their failure modes, i.e. wear, fatigue fracture deformation, decay and aging. Several failure modes or failure mechanisms may exist simultaneously for each part. Feilong jiangli try his best to take all the conditions into consideration to develop the best water pumps and other parts for the customers.
  3. Common failures of electronic-controlled engines are as follows: difficult starting; unstable idle speed; unstable idle speed of hot vehicles; engine tempering; engine running weakness; engine intermittent failure; cylinder starvation; excessive fuel consumption; poor acceleration and other symptoms. There are various reasons for every failure. 1.4Reasons for intermittent engine faults (1) Loose wiring connectors, tighten each item firmly; 2) Inspect the ignition system and the cylinder high-voltage spark (3) Check the status of distributors (4) Check whether the vacuum tube has air leakage (5) artificial vibration, observe whether the fault phenomenon changes. Feilong Jiangli will share other faults analysis of electronically controlled engine.
  4. Analysis of common faults of electronically controlled engines Common failures of electronic-controlled engines are as follows: difficult starting; unstable idle speed; unstable idle speed of hot vehicles; engine tempering; engine running weakness; engine intermittent failure; cylinder starvation; excessive fuel consumption; poor acceleration and other symptoms. There are various reasons for every failure. 1.1 Idle speed instability (1) Inlet system problems, make the mixture too thin (2) auxiliary air valve operation is not normal (3) injector injection time is not correct (4) ignition system is not correct (5) valve clearance is not correct (6) cold start injector leakage and other 1.3 engine operation of the main reasons for powerlessness (1) low fuel pressure, Poor fuel supply (2) poor ignition system or ignition timing (3) poor engine compression system (4) insufficient air flow meter or intake pressure sensor (5) engine wear seriously, insufficient cylinder compression Feilong Jiangli will share other faults analysis of electronically controlled engine.
  5. Other Engine failures 1) water tank rust and scaling. Rust and scaling are the most common problems in engine water tanks. Rust and scale will restrict the flow of coolant in the cooling system, reduce heat dissipation caused by engine overheating, and even cause engine damage to form acid, corrosion of metal parts in the tank, resulting in tank damage, leakage. Regular use of tank tension efficient cleaning agent to clean the water tank, remove rust and dirt which ensure the normal operation of the engine, and can extend the overall life of the water tank and engine. 2)the cooling system is in bad condition. The lubrication system is especially important for automobile engine maintenance, and little attention is paid to the cooling system. It is unknown that the most common troubles of automotive engines, such as piston cylinder pulling, knock cylinder punch internal leakage of serious noise, acceleration power drop is due to the abnormal temperature of the automotive engine, excessive pressure caused by poor condition. The bad condition of the cooling system will directly lead to the engine can not work at normal temperature, which will lead to the above serious failure phenomenon. Feilong Jiangli will share other kind of failure.
  6. Repairing methods for worn parts can be divided into two categories: machining worn parts to restore the correct geometric shape and fit characteristics, and obtaining new geometric dimensions. Surfacing, spraying, electroplating and electroless plating are used to supplement the worn parts, or expanding (reducing) upsetting is used to increase (or reduce) the size of the worn parts, and then mechanical processing is carried out to restore the nominal size, geometry and surface roughness. Repair of deformed parts can be done by pressure correction and flame straightening. The cracks and damages on the parts can be repaired by welding, brazing, bench work or bonding. The worn parts are machined by repairing dimension method and inserting sleeve method to make them have correct geometry. Repair dimension method is widely used in automobile repairing. In order to balance the service life of parts, repair dimension method is used in many parts, such as cylinder, piston, piston ring, piston pin, crankshaft and bearing, which have high wear rate and short service life. In automobile use, some of them are only local wear or abrasion. When the structure and strength permit, the wear parts can be reduced (shaft) or enlarged (hole) to a certain size (usually 2-3 mm) and then embedded into a sleeve by interference fit method to restore the basic size of the repair process. Such as: cylinder liner, valve guide and all kinds of bushing. Thanks for the help of Feilong Jiangli