mercedes

1. Dissipate heat The tank dissipates the heat of the cooling water by absorbing heat. Cycle the temperature to ensure the normal operation of the engine. 2. Protect the engine When the water temperature of the engine is high, the pump is repeated to reduce the temperature of the engine. At the same time, the electric radiators can dissipate the excess heat in the engine from the engine, so that the engine speed or driving conditions can be maintained at normal temperature.

The tensioner is divided into accessory tensioner (generator belt tensioner, air conditioning belt tensioner, mechanical supercharger belt tensioner, etc.) and timing belt tensioner according to the location. The tightening wheel can be divided into mechanical automatic tightening wheel and hydraulic automatic tightening wheel according to the tightening way.

Common rail diesel injectionA device that injects fuel into the intake pipe to enrich the mixture and improve the cold starting performance of the engine during cold starting. The cold start common rail fuel injection system is an auxiliary injector or a cold start electric valve to improve the engine's cold start performance.

In order to maintain proper belt tightening force, avoid belt slip and compensate the elongation caused by belt wear and aging, a certain torque is required in the actual use of the tightening wheel. When the belt tension wheel is running, the moving belt may cause vibration in the belt tension wheel, which can cause premature wear of the belt and tension wheel. To this end, a resistance mechanism is added to the tightening wheel. However, because there are many parameters affecting the torque and resistance of the tightening wheel, the influence of each parameter is not the same, so the relationship between the parts of the tightening wheel and the torque and resistance is very complicated. The change of torque directly affects the change of resistance, and is the main influencing factor of resistance, and the main influencing factor of torque is the parameter of torsion spring. Properly reducing the middle diameter of the torsion spring can increase the resistance value of the tension wheel.

Air intake pipe form an integral part of the cooling system. The main function is to transfer the coolant and assist the coolant to dissipate heat from the engine. The air intake tube are divided into: upper turbo intake hose, lower car air intake hose.

The led tail lamp of the car plays the role of prompting, telling the driving state of the car in front at this time to the car behind, which can prevent the occurrence of accidents. At present, automobile taillights mostly use LED lamp body groups with beautiful appearance and high luminous efficiency, so that the led rear lights can see the driving state of the front car more clearly. The tail light assembly is installed at both ends of the front of the car to illuminate the car when driving at night or on a road with dim lights.

The role of the steel rim wheel is actually only one, which is to install the tire, so its shape, specification and size must be compatible with the tire. In terms of shape, it can be roughly divided into two types: panel type and spoke type. Among them, the panel type is generally used in steel car wheels, and is more widely used on trucks; while the spoke type wheels are generally made of aluminum alloy. Basically, it is used in passenger cars.

Engine support pad broken common manifestations: 1, driving under the resistance of large torque, there will be a phenomenon of shrugging the car, reversing will also appear in the car, must increase the throttle can be solved; 2, start or open the air conditioning refrigeration engine shaking is very large, high-speed driving steering wheel vibration is obvious, while the acceleration and brake pedal also have a shock; 3, the second or third gear acceleration, often hear the sound of rubber rubber friction; 4. When the engine foot glue is found to have the above problems, it can be determined that the foot glue has been damaged, please replace it in time. Without effective shock absorption and support of the engine, some components will be damaged, which will affect the performance of the engine, not only the operation jitter, but also the phenomenon of unstable shaking of the engine.

A McPherson front suspension rigid-elastic coupling model was established by ADAMS/CAR, and the sensitivity of the suspension rubber bushing stiffness was analyzed by ADAMS/insight. The bushing stiffness, which has great influence on wheel positioning parameters, was selected as the design variable, and the minimum variation of wheel camber Angle, front beam Angle, kingpin internal Angle and kingpin rear Angle was taken as the objective function. The wheel positioning parameters were improved by experimental design and multi-objective optimization method. The results show that the kinematic characteristics of suspension can be effectively improved by changing the axial stiffness, torsional stiffness, radial stiffness, axial stiffness and torsional stiffness of front bushing on the lower control arm shaft. After optimized design, the suspension performance is obviously improved compared with the original scheme.