Jump to content

  • Welcome to Auto Parts Forum

    Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even sign up with social network platforms such as Facebook, X, and LinkedIn. 

     

Recommended Posts

The greater the damping force of the shock absorber, the faster the vibration is reduced, but the effect of the parallel elastic elements can not be fully exerted. At the same time, the excessive damping force may also lead to damage to the connecting parts and frame of the shock absorber. In order to solve this contradiction between elastic elements and shock absorbers, the following requirements are put forward for shock absorbers.

(1) In the compression stroke of the suspension, the damping force of the shock absorber should be small so as to make full use of the elasticity of the elastic elements to mitigate the impact.

(2) In the suspension stretching stroke (the distance between the bridge and the frame) the damping force of the shock absorber should be large in order to reduce the vibration rapidly.

(3) When the relative speed between the axle (or wheel) and the frame is too high, the shock absorber should be able to automatically increase the area of the liquid flow passage, so that the damping force is always within a certain limit to avoid excessive impact load.

Cylinder shock absorber is widely used in automobile suspension system, and it can reduce vibration in compression and stretching stroke. It is called bidirectional action shock absorber, and a new type of shock absorber is adopted, which includes air-filled shock absorber and resistance adjustable shock absorber.

P8R9aQ.jpg

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Content

  • Similar Topics

    • By OReilly Auto Parts
      Automotive Shock and Strut Overview | What do they do and why are they important?
    • By Counterman
      KYB said it has developed an environmentally friendly hydraulic fluid for shock absorbers.
      The newly developed SustainaLubeliminates the environmental risks associated with petroleum, according to KYB. The  
      Full release to the market is planned for 2026.
      The new fluid contributes to carbon neutrality by switching from petroleum-derived base oil to naturally derived base oil. It absorbs CO2 from the atmosphere during cultivation of the plants used for the base-oil raw materials, also reducing CO2 emissions during transportation, according to KYB.  
      SustainaLub is biodegradable up to 60% or more according to the Eco Mark certification standard (OECD301). The base-oil and additive formulation is recyclable, reducing environmental issues in the long term, KYB noted.
      “As a specialized global manufacturer of hydraulic equipment, KYB has long been involved in maintaining and improving the safety and comfort of automobiles,” the company said in a news release. “Using that experience, we are striving to achieve environmental balance without compromising performance or reliability. Not only does SustainaLub improve maneuverability and stability by applying it to the various damping force valves that we already offer, but it also improves the feel of the product by applying friction-control technology, for example KYB Prosmooth shock absorbers.”
      Replacing petroleum-based oil in KYB shock absorbers with this new hydraulic fluid will save up to 15.6 million liters of oil per year, according to KYB.
      Tested in Japan
      All new KYB products undergo reliability evaluation at the KYB Development Center in Japan.
      “Thorough performance and quality evaluation involves both bench tests and actual vehicle testing on our state-of-the-art test track,” KYB said. “This in-house design of a hydraulic oil recipe is unique to a manufacturer specializing in shock absorbers.”
      The KYB team participating in the All Japan Rally Championship JN-2 class introduced SustainaLub to their vehicles from Round 6 onwards They analyzed and verified the performance and durability in the harsh race environment, KYB noted.  
      In addition, SustainaLub was trialed in the vehicle used in the Lexus ROV (Recreational off-Highway Vehicle) Concept customer-experience program. It was used for Lexus’s first ROV equipped with a hydrogen engine. The data accumulated also contributes to technology development for future practical applications, and work toward the realization of a carbon-neutral society.
      “KYB plans to ultimately apply the technology to all hydraulic products involved in realizing a sustainable mobility society,” the company said. “As a specialized manufacturer of hydraulic equipment, KYB has long been working to improve the ride comfort and handling stability of automobiles. Based on this experience, KYB will continue to pursue advances in performance and reliability while keeping environmental impact at the forefront of development.”
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Counterman
      The Volkswagen Group is utilizing DCC Pro electronically controlled shock absorbers from KYB Corp. to equip new Tiguan, Passat Variant, SKODA Superb and Kodiaq models.
      The new models are scheduled to hit the market in the first quarter of 2024.
      DCC Pro (Dynamics Chassis Control Pro) systems use double-valve shock absorbers to independently control the extension and compression oscillations caused by the car body and the wheel movements while driving.
      These valves react to road conditions and driving situations in a few milliseconds, according to KYB. The ECU activates the respective extension and compression solenoids to adjust independently the internal pressure of the shock absorber to suit road conditions and the driver’s preference (from comfortable to very sporty).
      The damping characteristics are automatically adjusted in a continuous way, which, in conjunction with the full independence between extension and compression movements, “brings the vehicle comfort and control to the highest level.”
      “This provides safe, dynamic maneuverability and an unprecedented ‘flying-carpet’ ride experience,” KYB adds.
      KYB and the VW Group have been working together for several years. Since collaborating on the Audi RS suspension, KYB and Volkswagen have cooperated extensively for the VW brand.
      “KYB will continue growing in advanced technologies that provide high added value to our customers in these challenging times for the automotive sector,” the company said in a news release.
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Counterman
      If a customer mentions that they’re seeing fluid trickling from a suspension bushing, their eyes aren’t playing tricks on them. That bushing could be hydraulic.
      Hydraulic suspension bushings were developed in response to customer demands for smoother, quieter and better-handling vehicles. To achieve this, sophisticated suspension components are needed. Modern suspension systems look a lot different than they used to, with multiple links used to maintain suspension geometry.
      A non-hydraulic suspension bushing typically will feature a number of empty voids inside them. These voids are a product of clever engineering, and they allow for deflection/compression in a specific direction when placed under load. Hydraulic bushings fill those empty voids with a fluid. This fluid works like a hydraulic damper, while still allowing for deflection/compression when under load.
      The word “hydraulic” might imply that hydraulic fluid or oil is used inside these bushings, but they typically use a glycol mixture instead. Oil or hydraulic fluid would break down the rubber inside the bushing and cause it to fail prematurely. If you’ve ever seen a radiator hose that got coated in engine oil, you know what we’re talking about.
      These bushings are engineered with a certain tire and wheel combination in mind. This means increasing the tire and/or wheel sizes can throw this off, and the suspension may need to be repaired more frequently.
      Hydraulic bushings are able to isolate noise, vibration and harshness (NVH) from entering the vehicle cabin more effectively than standard bushings. Hydraulic bushings can be firmer without compromising passenger comfort, leading to crisp steering response and road feel. They will deflect less under load, such as braking or hard cornering, and this means better vehicle stability.
      But, all bushings eventually will wear out and need to be replaced. Hydraulic bushings may crack, rip or tear, just the same as non-hydraulic bushings will. The big giveaway is the hydraulic fluid leaking from the bushing.
      Failing hydraulic bushings typically exhibit one or more of the following symptoms:
      Clunking or knocking noises while braking or turning Evidence of fluid leaks coming from the bushings Unwanted suspension movement Tire wear (from excessive suspension movement) Increased NVH transferring into the vehicle cabin Replacement Tips
      Hydraulic bushings likely will be more expensive to replace than standard bushings. Here are a few tips and tricks to share with your customers.
      Let’s start with the most important tip: Always check the OE service information. Even if your customer has performed this type of repair in the past, it’s still a good idea to check the service information to see if anything has been updated recently. They should road-test the vehicle before and after the repair.
      If your customer is pressing a hydraulic bushing into or out of a suspension arm, they should be careful not to apply force directly against the rubber part of the bushing. Doing this will most likely rupture the rubber bushing, causing the hydraulic fluid to spill all over the floor. Once this happens, the bushing is ruined and must be replaced. Be sure to only apply force against the outer race or sleeve.
      Modern bushings likely will feature some sort of locating mark, notch or indicator. Reference the OE service information to learn how to correctly align the bushing to the suspension arm. Doing this will allow the suspension to articulate properly. Failure to do this may cause the suspension to bind up during movement, and/or cause the bushing to wear out or fail prematurely.
      It’s strongly recommended to wait to torque the fasteners down to specification until the suspension has been set to normal ride height. If the fasteners are tightened down with the vehicle in the air, the bushing will be forced to twist when the vehicle is lowered onto the ground. This means that the bushing will always be twisting at normal ride height, and this will surely lead to premature wear, tearing and/or failure.
      Finally, your customer should perform a four-wheel alignment if the service information calls for it. Some suspension components may not require an alignment after service; it depends on the make, model and application.
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • A-premium Auto Parts:5% OFF with Code GM5.
    • By RockAuto
      Get a $25 rebate with purchase of four KYB Shocks, Struts and Strut / Coil Spring / Mount Assemblies for your truck, SUV or crossover. View on RockAuto.com

×
  • Create New...