the rebound after the shock absorbing and impact from the road. After a rough road, although shock-absorbing spring can filter road vibration, but the spring itself will have reciprocating motion, while the shock absorber is used to inhibit this spring jump. Shock absorber is too soft, the body will be jumping up and down, shock absorbers too hard or too much resistance will impede the spring work. Modifications on the suspension system in the process, the hard spring shock absorber to be matched with the hard, while the spring stiffness and weight are closely related and, therefore heavier cars generally use the harder the shock absorber. Chen cited the crankshaft and connecting the device, used to counter the torsional vibration of the crankshaft (ie, the ignition cylinder crankshaft by the impact of the phenomenon of the pipe.)

    The structure of shock absorber piston rod into the cylinder with a piston in the cylinder full of oil. Orifice on the piston, making the Pistons out of the two parts separated by space, the oil can complement each other. With viscous damping is through the orifice when the oil produced, the smaller the orifice, the greater the damping force, the greater the viscosity of the oil, the greater the damping force. If the orifice size of the constant, fast work when the shock absorber, the damping effect through the General Assembly on the impact absorption. Therefore, the exit orifice to set up a disc of a valve spring, when the pressure becomes large, the valve is open the top, larger orifice opening, the damping becomes smaller. As a two-way movement of the piston, so both sides are equipped with spring piston valves, valves and done are called compression valve.

    Binoculars shock absorber according to their type and structure can be divided into monocular type. Duplex style is both internal and external shock absorber cylinder, piston cylinder, including the movement into and out of the piston rod, the volume of oil within the cylinder increases along with the contract, so to be exchanged with the outer tube to maintain barrel of oil in the balance. So have four valves in the shock absorber binocular, that in addition to the above-mentioned two throttle piston, there are mounted on the inside and outside the cylinder to complete exchange between the valve and the flow compensation valve.

    Compared with the binocular-type, single cylinder type shock absorber structure is simple, reducing a valve system. It is in the lower part of the cylinder with a floating piston (the so-called floating piston rod refers not control its movement), following the floating piston to form a sealed chamber, filled with high-pressure nitrogen. As mentioned above, the piston rod out of the oil liquid level changes caused by the floating piston to float to automatically adapt to it. In addition to the two shock absorber described above, there are resistance adjustable shock absorber. It can be changed by an external operation to the size of the orifice. Recent automotive electronic control damper as standard equipment, through the driving state sensor, the computer to calculate the best damping force, the shock absorber damping force adjusting mechanism automatically.

    Auto parts manufacturers from the automobile companies and the formation of specialized parts group, is becoming a global trend. The world's leading automobile and parts companies, almost all of China has established a joint venture or wholly-owned enterprises, technology joint ventures, has more than 1,000. Number of domestic high-tech, effective, large-scale automobile and auto parts enterprises to gradually grow up. With the introduction of the international automotive industry parts, "global sourcing" strategy and the implementation of multinational auto companies localization strategy, the domestic market will be a huge gap in supply spare parts. By 2010, domestic output value of China's auto parts will reach 7000 billion yuan.

The article above is transfered from glow plug, and spark plug