Essential General Knowledge for Auto Repair Apprentices
I. The basic structure of the automobile has four parts,? These four parts are: engine, chassis body and electrical equipment parts.
II. The four-stroke gasoline engine consists of a body, crank linkage mechanism, air distribution mechanism cooling system, lubrication system, fuel system and ignition system (diesel engines do not have an ignition system) and other components.
three. Four-stroke gasoline engine work process is divided into intake, compression, work, exhaust four processes. Four-stroke engine is the four processes in the piston up and down movement of the four strokes to complete.
IV. The role of the body and crank connecting rod mechanism is: combustion of fuel in the cylinder gas pressure on the top of the piston, with the help of connecting rods into the crankshaft torque, so that the crankshaft drives the work machinery to do work, the body and the crank connecting rod mechanism of the main parts of the cylinder block, cylinder head, piston, connecting rods, crank, flywheel and so on.
V. The role of the gas distribution mechanism according to the needs of the work, the timely opening and closing of the intake and exhaust valves, the timely introduction of gas into the cylinder and exhaust gas. At the same time, drive the distributor, gasoline pump and other parts of the work. The main parts of the gas distribution mechanism include: intake valve, exhaust valve, camshaft drive components.
VI. Cooling system is: the heat of the high-temperature parts of the heat dissipated into the atmosphere to keep the engine working at normal temperature. Water cooling system generally consists of engine water jacket, water pump, radiator, fan, thermostat, water temperature gauge and drain switch and other components.
VII. Water-cooled engine normal operating temperature should be 80-90 degrees. Engine temperature to liberation CA10B type car for example, according to the temperature of the engine, pull out (that is, open) or launch (that is, open and close) the driver's cab within the shutter maneuvering handle, change the amount of air into the radiator, so as to adjust the temperature of the engine.
VIII. Lubricating oil role: lubricate the friction parts, reduce friction resistance, can reduce power consumption. Cooling effect: oil circulation flow, can be friction belt away. Reduce the temperature of the machine parts. Cleaning role: the impurities on the surface of the machine parts flushed away, reduce wear and tear. Sealing effect: maintain the oil layer between the piston and the cylinder wall, can increase the sealing.
nine. Observe the oil pressure gauge on the cab dashboard: ? Normal oil pressure is 200-500 kPa for gasoline engines; 600-1000 kPa for diesel engines.
X. The construction of the carburetor can be divided into five devices: starting device; idling device; medium load device; full load device; acceleration device. The role of the carburetor is: according to the needs of the engine in different situations, the gasoline gasification, and mixed with air in a certain proportion into a combustible mixture. Timely and appropriate amount into the cylinder.
Expanded informationAutomotive maintenance technicians in strong demand? Constructing a high-quality training system is imminent
People's Daily Online Beijing, January 20 (Yan Feng) January 19 morning, high-quality automotive maintenance technician training system conference was held in Beijing. Huaqi Group, Jinyu Aviation, Saidi network three parties reached a strategic cooperation agreement at the meeting, in the future will *** with the improvement of the automotive aftermarket industry talent training industry chain, for the training of automotive repair technicians to bring a new concept and mode of operation.
Huaqi Group Chairman Wei Tongwei also believes that China's annual automotive aftermarket industry scale reached 800 billion yuan, the annual growth rate of 30% of the rapid development. However, at present, China's automotive aftermarket market players are small in size and scattered distribution, the industry has not formed a perfect unified standards and industry norms, greatly restricting the pace of market development.
The real demand of automotive aftermarket makes the establishment of talent training mode and system imminent. Therefore, by providing the hardware equipment and site environment for professional training, introducing the aviation talent training system of Jinyu Aviation and the Internet+education platform of Saidi.com, the three parties will ****together to build a high-quality, standardized aviation-level automotive maintenance technician training system, so that the development of the automotive aftermarket will increase in quality and quantity.
In addition to this, the establishment of training courses and training platforms is an important carrier, and the Internet+ platform provides the greatest convenience and best opportunities for this. Liu Xingbo, president and editor-in-chief of SEDI, elaborated on SEDI's platform advantages and resource elucidation. In the future cooperation, Sadie's education platform will provide online course services for training, saving training manpower, material resources and time costs, and facilitating management while being more flexible.
It is reported that the three parties will also carry out more cooperation in the future in the direction of aviation innovation application, automotive after-market field innovation incubation, etc., to promote the gradual improvement of the vocational norms of the automobile repair industry.
Reference? People's Daily Online - Automotive Channel