Odyssey car diary: why is it easy to drive? Look at the suspension carefully!

From the first generation to the fourth generation, Odyssey has always been regarded as the best MPV in its class (even across the class) by all kinds of automobile media at home and abroad. The reason why the Odyssey is easy to drive is inseparable from the excellent adjustment of Honda's experienced technicians. Of course, a "natural" good foundation is even more indispensable. The jack of Odyssey is easy to operate. Honda is considerate enough to customers. The chassis structure of the latest generation (the fourth generation) Odyssey is the front double wishbone and the rear multi-link, which is not much different from the third generation. It is a common collocation that pays attention to chassis stability and sports vehicles. It mainly adjusts some geometric parameters and optimizes them to better suit the road conditions in China. Red line is the simplest way to identify double wishbone/double wishbone. Honda always emphasizes handling, so the designer chose a higher specification double wishbone suspension instead of McPherson suspension (not to say that McPherson is not good). The external structure of this suspension is not very complicated, but the parameters to be adjusted are much more complicated and precise than McPherson suspension. Especially on the front drive, due to the placement of the transmission shaft and steering mechanism, the design of the whole front subframe needs very careful calculation to play the characteristics of the double wishbone. The double wishbone suspension consists of two upper and lower V-shaped or A-shaped control arms with different lengths and a strut hydraulic shock absorber. Generally, the upper control arm is shorter than the lower control arm. One end of the upper control arm is connected with the strut shock absorber, and the other end is connected with the vehicle body; One end of the lower control arm is connected to the wheel and the other end is connected to the vehicle body. The upper and lower control arms are also connected by connecting rods, and the connecting rods are also connected to the wheels. In the whole suspension structure, the integrity of the upper and lower control arms and the whole suspension is improved by connecting multiple fulcrums. The structure under the suspension is much more complicated than McPherson's, and even the stabilizer bar is not fixed on the shock absorber strut like McPherson's, which is very different. Odyssey's chassis protection is not very comprehensive, and the oil pan is clearly visible. Although it is not prominent, users should always pay attention to chassis protection when driving. The lower control arm supports the shock absorption strut and also fixes the transmission shaft, which is not equal to the length of the upper rocker arm. The red arrow refers to the connecting rod connecting the upper control arm and the brake disc. You may not know what the functional characteristics of the double wishbone are, so I will explain it to you now. It has an upper fork arm and a lower fork arm, and the lateral force is absorbed by both fork arms at the same time, while the column only bears the weight of the car body, so the lateral stiffness is large. The upper and lower A-arms of double wishbone suspension can accurately locate various parameters of the front wheel. When the front wheel turns, the upper and lower fork arms can absorb the lateral force on the tire at the same time. The lateral stiffness of the two fork arms is large, so the turning roll is small, which is one of its advantages. Double wishbone suspension usually adopts wishbone with unequal length (short upper part and long lower part), which can automatically change camber when the wheel moves up and down, reduce the change of track distance and tire wear, and can adapt to the road surface, with large tire contact area and good ground adhesion. The front wheel brake adopts ventilated disc, which is small in size, but the actual braking effect is good. Judging from the wear marks of the disc, the brake pads and the disc surface work well, without eccentric wear, and the quality is very good. It is not new to use multi-link rear suspension in this class of vehicles, but Odyssey's multi-link is somewhat special, and its structural arrangement is different from that of the conventional multi-link rear suspension, such as the multi-link rear suspension of Volkswagen PQ46 platform, and its connecting rod, shock absorbing strut and rocker arm basically form a straight line with the subframe. On the other hand, Odyssey's subframe is farther back, and the connecting rod, shock absorber and rocker arm are placed in front. This structure is relatively rare. Honda calls it a double wishbone independent suspension, regardless of whether it is a double wishbone for the time being. This suspension structure is helpful to improve the seating space of the carriage, because the subframe is installed in the position of the third row of cushions, and the actual performance does not occupy the third row of leg space. The green, blue and red arrows refer to the connecting rod of the rear suspension, and the orange arrow refers to the stabilizer bar. In addition, the shock-absorbing strut does not "top" on the top of the wheel arch, but leans against the inside of the car body, leaving more space for the seating space. The red arrow refers to the brake oil pipe, and the orange arrow refers to the subframe made of red steel pipes inside the car. Obviously, it is biased towards the rear stabilizer bar of the whole rear suspension, which is very thick, and anti-roll is very helpful. In fact, the roll of Odyssey in the fast turn is not obvious, and it can even be compared with mid-to high-end cars. You can see the sensor connector, which is the point where the body stability system (VSC) collects the rear wheel information (as shown by the arrow in the above figure). As long as the preset value of the connecting rod deviates, the signal will be immediately transmitted to the ECU, and then the corresponding rescue signal will be started. In fact, as long as the car is equipped with a body stability system, there will be this sensor on the connector of each wheel, but the position is different. The rear wheel brake adopts the configuration of one-way piston+solid disk, which looks small (in fact, it is not small), but the braking effect is good and it can be used with confidence. A large space is reserved in the middle of the subframe, which is obviously reserved for the rear differential, because the Odyssey sold in Japan has a four-wheel drive system, although it is not provided in China, the chassis structure will not change. This "exploration" of Odyssey suspension has come to an end. We have learned a set of complicated chassis suspension, and we know what supports the chassis fit of Odyssey and the side roll of the car when turning.