When discussing the light bus type, there is always a special suspension, its name is "Hodgsky suspension"; the car brand with this suspension as the selling point is Jiangling Ford, such as the Quanshun new generation of this car has been talking, but what is the difference between this suspension and the "leaf spring integral bridge" used by ordinary light passengers?
In fact, there is no difference in essence, first of all, its basis is the overall bridge, because such models are always mainly front-mounted rear-drive; the rear-drive use of the overall bridge can effectively improve the bearing capacity, to put it bluntly, the cargo carrying capacity will be stronger. Therefore, under the premise of the same infrastructure, the difference is nothing more than steel plates.
This is the composition of the overall bridge and leaf springs, Hodgsky suspension is only a special steel plate; but the application of this suspension is actually very extensive, in pickup trucks and other light trucks have been used for more than half a century, the current mainstream pickup trucks are using this suspension, the concept is two or more pieces of different steel plate composition.
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Such a combination is white is the variable section leaf spring, this spring can be divided into equal rigidity, gradient rigidity, two-stage stiffness three kinds; Hoczski suspension is the use of gradient rigid leaf springs, so also called "gradient stiffness leaf spring suspension"; its concept is that the stiffness of the spring assembly will not change linearly, but by the lower stiffness of the spring responsible for light load, after the full load causes the main spring to be pressed to combine with the secondary spring, the overall rigidity of the spring will be enhanced, to put it bluntly, it is to rely on the secondary spring to strengthen, At this time, the vibration damping capacity becomes poorer but the load carrying capacity becomes stronger.
It cannot be denied that the combination of gradient spring plates can take into account the driving experience of heavy load and light load, especially when it is light load, it will feel that the bumps are not so serious, but the overall rigidity of the gradient spring is generally not very high; so the light passengers with heavy loads or too many nuclear loads often use the same rigid spring plates, but in the light passengers of independent brands, there are also Chase V90, Jacques Xingrui and other cars that use gradient spring plates, but the heavy-duty options in these cars use a combination of rigid high-strength spring plates. In fact, the general variable section spring suspension has also had a good driving experience, and the gradient steel plate is far less than the experience of the coil spring or the torsion bar spring; so there is no need to mythologize the light passenger of Jiangling Ford, the internal combustion engine technology of the brand car has lagged behind, and it is actually quite embarrassing to focus on the steel plate.
There is another related model to discuss about the Hoczyski gradient steel plate suspension, which is the pickup truck.
Pickup truck is a light truck, the truck of course needs to use a strong bearing capacity of the overall bridge, if the use of independent suspension may appear more serious problems; because the independent suspension is not easy to match the leaf spring, with the coil spring as the main, torsion bar spring as a supplementary option, some vehicles will use air spring (compressed air support). Compressed air bag springs are not repeated, the cost is too high, no pickup truck will be used; the main option is the coil spring, which is prone to technical fatigue, which has been reflected in passenger cars. Many vehicles with frequent full loads or heavy loads will have the problem of "collapsing butts" after several years of driving, that is, the rear of the car has become much lower, especially in taxis; this is caused by severe metal fatigue of the spring and shorter compression stroke.
Pickup trucks will always carry goods at a high frequency, and it is still "overloaded as the norm"; the service life of ordinary coil springs will become very short, and the stiffness of high-standard reinforced coil springs is not lower than that of leaf springs, which has no effect on improving the driving experience, and the manufacturing cost will be relatively high. Therefore, many high-end pickup trucks still use gradient leaf springs, which are actually not suitable for the use of passenger car standard suspension.
In summary, the characteristics of the Hochsky suspension are like this, in fact, there is nothing special; ordinary vehicles can also be replaced, the replacement is nothing more than a gradient spring plate, but the strength standard of the spring plate should match the standard of heavy load, otherwise it may cause problems such as tail sinking or even steel plate breaking, which is not a small problem.
The steel plate used in some off-road vehicles can be upgraded with confidence, after all, these cars will not have high-frequency heavy loads, and there are very few off-road vehicles that really drive frequently; as long as the selected spring plate matches the strength needs of the vehicles analyzed by themselves, there will be no risk in driving the vehicle off-road.
Edit: Day and Auto - Automotive Science Island
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