Vehicle combination damping system, is the current vehicle on the four separate role of the fluid (liquid or gas) as the medium of the shock absorber combined into two groups, constituting a shock absorption system, the overall effective slowing down of the vehicle in traveling all kinds of vibration, in order to improve the safety of the vehicle and the purpose of comfort.

Vehicle shock absorber is the vehicle traveling shock absorption and safety devices, common spring, liquid and gas and other types. With the development of science and technology, especially automotive technology is changing rapidly, for a variety of new shock absorbers for automobiles continue to come out, the structure of the suspension or non-suspension, the medium of liquid or gas, etc.. They usually have four, respectively, placed on top of their respective wheels, each independently to withstand the vehicle traveling in the direction of the vibration and play a shock absorbing buffer function. In recent years in the vehicle appeared in the electronically controlled active hydraulic (air) suspension, although it through the computer will shock absorber combination for the system, and greatly improve the vehicle's damping performance. But need to set up an independent hydraulic power or air pressure source, not only the system is more complex, expensive to make the recent difficult to popularize, and more energy consumption.

Vehicle combination damping system, is currently on the vehicle four separate role of the fluid (liquid or gas) for the medium of the shock absorber combined into two groups, constituting a shock absorption system, the overall effectiveness of slowing down the vehicle in traveling all kinds of vibration, in order to achieve the purpose of improving the safety and comfort of the vehicle.

The shock absorbing system is realized by the following technical solutions: four shock absorbers placed on the four corners of the vehicle are named right front (RF), left front (LF), right rear (RB) and left rear (LB), and the two shock absorbers in the diagonal orientation are respectively combined into two groups (RF and LB are one group; LF and RB are another group), and the two two-position four-way solenoid valves (1DT and 2DT) put the When 1DT and 2DT are not energized, the upper and lower chambers of the two shock absorbers in this group are interconnected (i.e., parallel); when 1DT and 2DT are energized, the two shock absorbers in this group are interconnected due to the solenoid valve commutation, which changes the upper and lower chambers of the cylinder into a cross-connected one, so that this group of shock absorbers will have two working states after combination. 1DT and 2DT are energized or not, depending on the relevant sensors on the vehicle. Whether 1DT and 2DT are energized or not depends on the relevant sensors on the vehicle to measure the road surface conditions and vehicle driving conditions or the relevant instructions issued by the vehicle electronic control system.

The vehicle combination damping system, with simple structure and low cost, can effectively play the overall function of the combination damping system and improve the safety and comfort of vehicle operation; it can be used in simple vehicle control system or matched with electronically controlled active suspension, which is widely applicable.

Figure for the working principle of the vehicle combination damping system, on which RF, LF, RB and LB are respectively located in the four corners of the vehicle shock absorber, where the check valve and throttle valve is the original device within the hydraulic shock absorber, in order to repeatedly damp the fluid to realize damping, the vibration energy is converted into the thermal energy of the fluid.

The technical solution is further described below in conjunction with the figure, using a commonly used hydraulic shock absorber as an example:

The damping process of the system is, when the vehicle traveling in a straight line due to road surface unevenness caused by vibration, at this time 1DT and 2DT are not energized, the groups of shock absorbers in the two shock absorber cylinder upper and lower cavities with the help of solenoid valves in parallel, if the right front wheel encountered a sudden bump in the road surface, the RF shock absorber cylinder body uplifted, the car body of the right front part of the inertia due to lagging uplifted, the lower cavity of the shock absorber cylinder oil pressure rises, the cavity of oil in addition to through the internal passage of the shock absorber. At this time, the cavity oil in addition to repeated damping through the internal channel of the shock absorber for energy conversion to realize the function of damping, but also through the 2DT solenoid valve shunt flow to the diagonal of the LB shock absorber cylinder cavity, in reducing the rising trend of the car body and the RF shock absorber cavity pressure at the same time and make the lower chamber pressure of the LB shock absorber, increase the body of the left rear of the resistance to the drop capacity. In this way, after the combination of RF and LB two shock absorbers comprehensive role is to make the body of the right front rise reduced, and reduce the body of the left rear of the decline; when the right front wheel suddenly encountered potholes in the road surface, the body of the car due to inertia hysteresis sinking, the RF shock absorber cylinder downward, the cylinder upper chamber pressure rises, at this time the cavity of the oil in addition to the shock absorber through the internal channel repeatedly damping to achieve the function of vibration damping energy conversion, but also through the The 2DT solenoid valve distributes the oil to the upper chamber of the diagonal LB shock absorber, which reduces the downward trend of the car body and the pressure in the upper chamber of the RF shock absorber and at the same time makes the pressure in the upper chamber of the LB shock absorber rise, increasing the resistance to rising of the left rear part of the car body. In this way, the combined effect of the two shock absorbers RF and LB is to reduce the sinking of the right front of the car body and to reduce the rising of the left rear of the car body. Obviously, under these two road conditions, the combined shock absorber helps to some extent in the event of sudden road surface unevenness.