Tune Your Life. Suspension

Stick to the way of rolling and polish the transient characteristics.
The highlight of "Kansei tuning", suspension.

The highlight of "Kansei tuning", suspension.
For example, in the case of a sports car, handling is prioritized. For SUVs and sedans, emphasis is placed on cruising comfort ... The settings of mass-produced vehicles are considered according to the character of the vehicle.However, mass-produced vehicles are premised on usability that does not make anyone feel uncomfortable, so an equal balance of steering stability, ride quality, comfort, etc. is emphasized, and it is thin from the point of making driving stand out. It has to be a taste.If you are a driver who wants to enjoy driving sporty, it is natural that you want to focus more on driving and bring out abilities that could not be reached at the mass production level.
That's where our tuners come in.Driving, riding comfort, and usability ... There is no magical tuning that improves all-round, but first of all, the feelings of the sports sect are given top priority.Therefore, regardless of genre, from sports cars to SUVs, sedans, and minivans, we are refining the quality and standard of driving with the principle of dynamic Kansei engineering-based method = "Kansei tuning."The highlight of this Kansei tuning is our suspension.

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To refine the transient characteristics. AutoExe style tuning method.
What is Kansei Tuning in Suspension?It is that the car and the driver synchronize and interact.Specifically, it is the refinement of the transient characteristics that the car responds to the driving operation.For example, the moment you start turning the steering wheel, the car gently starts rolling with a G.Then, while maintaining a stable posture, the car traces the line envisioned by the driver's accelerator work ... Bringing that process to "A New Driving Sensation", which is a sporty driving that could not be experienced at the level of mass-produced cars. ..Let's explain step by step the AutoExe style tuning method that realizes this ride.

[Spring setting] Basically, mass production ratio, vehicle height -20mm, spring constant 110%.
The first is the setting of the spring, which is the main factor that determines the roll rigidity (roll amount).The lower the vehicle height, the lower the center of gravity of the car and the higher the exercise performance, but the distance between the center of gravity and the roll center changes and the force to roll becomes stronger.In addition, the suspension stroke becomes short, causing bottoming out.As a natural logical consequence, it is necessary to increase the spring constant according to the amount of reduction, which leads to an increase in the feeling of pushing up = deterioration of ride quality.
We judge driving, comfort, and safety on the street from various angles, and set a standard of about -20 mm for mass production specifications for sports cars and about -25 mm for SUVs with a high center of gravity.It is different from the short-circuit tuning that the lower the better.
Next, once the amount of vehicle height reduction is determined, the minimum required spring constant can be derived based on the car's sprung mass (weight). Our objective is to obtain maneuverability that is in sync with the driver's expectations, but the basic setting is to not sacrifice ride comfort in urban areas. Therefore, although it depends on the car model, the spring constant is determined based on approximately 110% of the mass-produced car. In combination with the damper damping force, the ride quality and maneuverability are exquisitely set. However, high-limit sports products designed for circuit driving and club sports suspension kits are an exception. Here, we are trying to achieve a 250% level, giving priority to maneuverability = roll rigidity, while abandoning the need for both ride comfort and ride comfort.

[Damper damping force setting]
The function required of the damper is to convert the vibration energy of the spring set in the previous section into heat energy and attenuate it. Only the core part of the "ride taste" has its own attention to detail in its characteristics.

Please see the above <Damping ratio / damping force characteristic diagram>.You can see that the emphasis is on the rise of damping force in the low speed range, especially in the very low speed range that affects the initial roll rigidity ().Blue line).Regardless of the series, our dampers are designed with the highest priority on rising in the very low speed range from 0 to 0.1 m / sec piston speed.
Why are you so particular about the very low speed range?Generally, the damping force of the damper is displayed as a numerical value at 0.3 m / sec, but it is the area below that that smoothly accommodates the initial roll that occurs at the entrance of a corner or turning back at S. be.Specifically, the moment when the damper starts to move.Numerically, by raising the damping force with a sharp curve from a very low speed range with a piston speed of 0.05 m / sec or less, the roll speed from the moment the steering is turned is suppressed (not the absolute amount of roll).By lowering the angle (deg / sec) per hour when the car = driver tilts, the fear of rolling at once is reduced.The car is rolled gently and gently, increasing the sense of security when cornering.On the other hand, the fact that the increase in damping force is suppressed after 0.1 m / sec, which is required for energy absorption when overcoming protrusions such as ruts, manholes, and road seams, is a reduction in push-up that resonates in the abdomen (feeling of riding comfort). ).Also, for the same reason, the allocation of the total damping force value is piled up on the extension side and the compression side is kept low ().Blue line).And the damping ratio is the key to the design.※ 1Unique design philosophy based on.In all products, not the single specifications of dampers and springs, but the ideal value as much as possible with the combination of both.※ 2The point is to get closer to (Red line).

※ 1The ratio of the damping force of the damper to the critical damping force (the last-minute damping force that determines whether the spring vibrates or not).
※ 2The development standard is a damping ratio of 0.05/0.1/0.3% at a piston speed of 70 / 50 / 30m / s.

By the way, we have an ideal curve that shows the absolute value of the damping force (Blue line) Has been called the "sunfish curve".This is because the damping force on the extension side rises sharply and resembles the head of a fish sunfish.The same thing was seen with the concept of damping ratio (an index of spring difficulty in movement).Red line)is.You can see that the damper is designed to work more effectively (high damping ratio) when the piston speed is low.In terms of form, "Chinese Ankou Curve" ... I would like to introduce it for an image-like understanding of our concept.

Also, in so-called tuning dampers, the damping force adjustment type is the mainstream, but we dare to stick to the positive adoption of the fixed type (non-adjustment).The reason is that the oil path of the piston is simpler than the adjustable type, so the resistance of the damper oil is converted into damping force without waste without escaping to an extra path (adjustment mechanism) from the very low speed range at the moment when the damping force rises. The body.Regardless of whether it is a twin tube type or a mono tube type, it delays the generation speed of rolls, squats, and nose dives that could not be compensated by increasing the spring constant, and enhances the initial response of the car.
With this design concept in common, the technical methods and specifications are clearly separated to establish the "ride" of each lineup.As for the suspension, other parts are set in detail.For example, a wide range of sports stabilizers, from sports cars to passenger cars.This is a manifestation of our sensitivity tuning, which suppresses roll and stabilizes posture without increasing the spring constant more than necessary.Furthermore, adjustable links, tie rod ends, etc ... I want you to go beyond the mass production level and realize a sure footwork suitable for the rider's sensibility and hobby.

Buyer's Guide

Find the best product for you according to your purpose and budget.We compare the characteristics of suspension parts and the changes in ride quality.Please see each product page for details such as specifications ...

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Street Sports SUS Kit

New release for CX-60. An endless challenge to "ride taste". Street best model. "Street Sports Suspension Kit" is what we at AutoExe think is the best street...

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Club Sports SUS Kit

To a solid driving feeling.Low center of gravity & high roll rigidity high limit sports.Developed with the theme of low center of gravity and high roll rigidity.We stripped comfort down to the limit that we can allow, and that margin...

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Low down spring

Newly released CX-60 for gasoline vehicles.The basic vehicle height is -20mm.Balances style and ride quality.Designed for an unspecified number of people, including installation of tire chains and consideration for road clearance...

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Sports Damper

To the handling at will without lowering the vehicle height.Mass-produced shape product.What we focus on in suspension tuning is not the absolute amount of roll, but the roll speed up to that point.

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Adjustable Stabilizer Link

New release for CX-60. Adjustable link essential for stabilizer when lowering. As you know, the left and right suspension arms are connected and their spring effect suppresses roll...

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Sports Stabilizer

Newly released for CX-60 Without lowering the ride height, without compromising ride comfort... Suppresses the amount of roll during cornering that cannot be suppressed by springs alone.Left and right suspensions are toshi...

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Sports Tie Rod End

Corrects the tie rod angle during lowdown and restores steer characteristics.The tie rod that connects the steering and the left and right knuckles of the front wheels and changes the direction of the tire is designed based on the mass production vehicle height ...

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Suspension Bush Set

More than a sports car and less than a racing car.Mass-produced shape product with tuned rubber hardness.In order to enjoy driving positively, it is important to communicate closely with the car.Dora...

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About overhaul

Regular overhaul (O / H) is recommended.The shock absorber gradually loses its original performance due to wear, deterioration of hydraulic oil, and decrease in gas pressure due to use.Always the best performance ...

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