The general belief, multi link ( Multi-Link ) from the cross arm and the trailing arm type suspension evolved. The cross arm and the trailing arm is decomposed into a number of connecting rods, in order to achieve the equivalent movement or force transmission effect. Even after the car carefully study the spatial type multi link, more than the traditional rocker to more variable motion ( motion here refers to the suspension action, rather than the movement of the vehicle performance ). According to the connecting rod of the layout, we still can be most multi-link design, divided into " Mcpherson style" or " wishbone ", and very few cases, some of the multi-link complex degree is difficult to such summary. Because R & D cost is higher, and the occupied space is relatively large, multi-link suspension form used for intermediate to advanced models.
The connecting rod and the rocker arm
First of all to the connecting rod and the rocker arm concept of partition. From the project definition, only at the two ends of the rod body force, and makes the rod body around the axial twisting tendency of torque, known as the " rod "; at the same time by various direction force and torque, known as the " arm ". Therefore the stress form with different kinds of connecting rod and the rocker arm, is to distinguish the main basis. Of course, the appearance on the differences but also enough to make a person will be able to tell the difference, because the stress is the main push and pull rod shape, more slender, and arm because they have to bear more complex force and torque, the arm body itself will be more robust, while at the same time with the frame or a plurality of hinged joint steering knuckle, perhaps the hinge joint structure and stronger. And the rocker arm and the connecting rod combination of multiple link system, such as Fawkes, Toyoda Eishi Ford Mazda 3/ / Lexus IS rear suspension, is called " multiple connecting rod ".
Multi link characteristics
Many people say that a multi-link suspension is comfortable suspension, really? Multi link uses a complex geometry of motion through the connecting rod, different constraint conditions, come in line with the car plant requirements of the instantaneous motion center ( steering section around a point of rotation, which is located in a tract of arc, a particular position corresponding to the central ) and the corresponding motion trajectory. And walk this system is suspension system guided by the way of exercise, can according to the connecting rod design, produce different characteristics. However, as the senior car comfort requirements of increasingly high, multi-link more time is used to " manufacture " comfort. For example, in suspension uplink ( simulation of obstacle encountered protrusions ), kingpin inclination angle to the direction of the moving through the protrusions, process is more smooth, then the car factory will be below the connecting rod design of steering knuckle for uplink will pull back to section, while the top of the connecting rod is upward when the steering knuckle push forward, so the steering knuckle kingpin uplink, anteversion angle increases, through the barrier can be more smooth, can meet the comfort requirement. But in some models, it can also be designed high sports, such as Nissan GTR, Porsche 911, the rear suspension is the use of multiple linkage system.
Multi link modification
Multiple constraint conditions, multiple linkage system in design stage, would have to involve very complex kinematics calculation theory, as well as a series of simulation test. The modified business, multi-link set-up is also makes them quite a headache. Now the sale of multi-link modified products, for the effectiveness of propaganda, most is " to restore factory settings", or " corrected within eight at fetal phenomenon", this recovery effect, little present " significantly enhance the control performance of this kind of rhetoric ". In order to improve the performance of driving rod, unless have the raw data, and were comparable to those of depot suspension engineering technology. More complex, want by adjusting to obtain absolute positive effect, the more difficult it.
The connecting rod and the rocker arm
First of all to the connecting rod and the rocker arm concept of partition. From the project definition, only at the two ends of the rod body force, and makes the rod body around the axial twisting tendency of torque, known as the " rod "; at the same time by various direction force and torque, known as the " arm ". Therefore the stress form with different kinds of connecting rod and the rocker arm, is to distinguish the main basis. Of course, the appearance on the differences but also enough to make a person will be able to tell the difference, because the stress is the main push and pull rod shape, more slender, and arm because they have to bear more complex force and torque, the arm body itself will be more robust, while at the same time with the frame or a plurality of hinged joint steering knuckle, perhaps the hinge joint structure and stronger. And the rocker arm and the connecting rod combination of multiple link system, such as Fawkes, Toyoda Eishi Ford Mazda 3/ / Lexus IS rear suspension, is called " multiple connecting rod ".
Multi link characteristics
Many people say that a multi-link suspension is comfortable suspension, really? Multi link uses a complex geometry of motion through the connecting rod, different constraint conditions, come in line with the car plant requirements of the instantaneous motion center ( steering section around a point of rotation, which is located in a tract of arc, a particular position corresponding to the central ) and the corresponding motion trajectory. And walk this system is suspension system guided by the way of exercise, can according to the connecting rod design, produce different characteristics. However, as the senior car comfort requirements of increasingly high, multi-link more time is used to " manufacture " comfort. For example, in suspension uplink ( simulation of obstacle encountered protrusions ), kingpin inclination angle to the direction of the moving through the protrusions, process is more smooth, then the car factory will be below the connecting rod design of steering knuckle for uplink will pull back to section, while the top of the connecting rod is upward when the steering knuckle push forward, so the steering knuckle kingpin uplink, anteversion angle increases, through the barrier can be more smooth, can meet the comfort requirement. But in some models, it can also be designed high sports, such as Nissan GTR, Porsche 911, the rear suspension is the use of multiple linkage system.
Multi link modification
Multiple constraint conditions, multiple linkage system in design stage, would have to involve very complex kinematics calculation theory, as well as a series of simulation test. The modified business, multi-link set-up is also makes them quite a headache. Now the sale of multi-link modified products, for the effectiveness of propaganda, most is " to restore factory settings", or " corrected within eight at fetal phenomenon", this recovery effect, little present " significantly enhance the control performance of this kind of rhetoric ". In order to improve the performance of driving rod, unless have the raw data, and were comparable to those of depot suspension engineering technology. More complex, want by adjusting to obtain absolute positive effect, the more difficult it.
As shown in the figure, it is typical from the Mcpherson type suspension improved to two link front suspension. Two connecting rods on the steering knuckle connection point, and the shock absorber column of the kingpin axis are coaxial, such suspension telescopic will not bring caster ( Caster ) changes.
Mercedes-Benz C63 AMG five link rear suspension, we count. Don't drive shaft also number in oh. This suspension is typical, in compression when the kingpin caster angle will change, make through the protruding obstacle smoother design.
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