KW Functional & Quality Features

CUSTOMIZED SUSPENSION LOWERING

Fulfills Every Wish

KW coilover suspensions, KW coilover springs, and KW DLC AirSuspensions allow the suspension to be steplessly lowered within the framework of the certified technical component report. For example, our Street Comfort products allow for a customized height setting with gentle suspension lowering from 10 - 50 mm, while the Street Performance products allow the maximum technically possible suspension lowering range from 45 - 85 mm, depending on the vehicle. This means that the suspension can be lowered to suit the personal needs of the user and, depending on the product category, a setting ranging from Comfort to Performance can be chosen.

REBOUND STAGE ADJUSTMENT TECHNOLOGY

Two-Step Rebound Valve with Adjustable KW TVR-A Rebound Stage Damping Technology (Twin-Valve Rebound Adjustable)

The rebound stage damping is precisely tuned to the respective vehicle on our in-house drive dynamics test facility, with the setting fixed in the mid range. Individual customization can be achieved in 16 precise click positions, allowing you to choose between more comfort or more body control. The two-step patented TVR-A technology allows the damper oil to flow through an adjustable, conical low-speed valve during slow piston speeds, while during higher piston speeds the main rebound stage valve opens to handle the flow of large volumes of oil. This provides major improvement in ride comfort without influencing the high-speed in the safety-relevant zone.

COMPRESSION STAGE ADJUSTMENT TECHNOLOGY (LOW-SPEED)

Two-Step Compression Stage Valve with Low-Speed KW TVC-A Adjustment Technology (Twin-Valve Compression Adjustable)

The patented compression stage valve with TVC-A technology features two separate spring pre-tensioned valves for small and large volume flow. The compression stage is tuned to the respective vehicle type on our 7-post rig and is delivered with a mid-level factory setting. Within 12 precise clicks the adjustable compression stage valve can increase or decrease the cross-section in the low speed valve, thus providing more or less compression damping. At the same time, in the case of sudden high piston speeds, the spring pre-tensioned needle valve opens along with the spring pre-tensioned main valve to its maximum valve cross-section, to prevent unwanted progressive power surges in the high-speed range with its blow-off feature. This makes it possible to brace the vehicle body better while still offering more comfort than the conventional valve technology during high wheel acceleration. The compression stage damper setting is always supplied in combination with a separate rebound setting, only one independent 2-way damper setting allows for true performance optimization.

COMPRESSION STAGE ADJUSTMENT TECHNOLOGY (LOW & HIGH-SPEED)

Two-Step Compression Stage Valve with Low and High-Speed KW TVCLH-A Adjustment Technology (Twin-Valve Compression with Adjustable Low/High Speed)

This is the high-end motor sports technology for the most demanding street and track performance customers. Two separate valves and a two-way adjustable compression stage valve allow separate compression damping changes in the low and high-speed range. The adjustments are made via two adjustment dials with click increments that feature 16 settings (with 15 clicks) in the high-speed valve housing and 7 settings (with 6 clicks) in the low-speed housing. During tuning at the KW drive dynamics test facility, the groundbreaking V4 coilover suspension is tuned to a mid-level basic setting for the best road performance with an additional recommended setting for occasional track day use. The 3A Clubsport coilover suspension is tuned to a mid-level factory setting especially for track day use, with an additional recommended setting for the drive to the race track. Starting from the factory setting, the damping can be set firmer or softer for low and high-speed. The TVCLH-A technology has a blow-off feature with large cross-sections. The resulting high low-speed forces create the best bracing for the vehicle body to keep the tires on the road in the case of wheel-induced high damper speeds (driving over curbs). The separate low and high-speed setting is always supplied with an additional rebound setting, to ensure an independent three-way damper setting.

COMPOSITE SPRING SEAT

Because the Devil is in the Details

The KW coilover spring seat is made from a wear resistant and friction-optimized polyamide composite material with a stainless steel insert. In contrast to the anodized aluminum adjustable spring seats, the polyamide composite material prevents any possible oxidation. In combination with the Inox Line, this guarantees the long-term functionality of the height setting.

TRAPEZOIDAL THREAD

The Perfect Height-Adjustable Coilover

In comparison to common coilovers, KW uses a friction -optimized and dirt insensitive trapezoidal thread that displays low adjustment forces. Its large cross-sectional area allows for a higher load-bearing capacity.

INOX-LINE

The Only Truly Permanent Corrosion Resistance

KW’s coilover suspension struts are manufactured from high-quality stainless steel that is rust-proof. In contrast to other solutions, coatings will not wear off while adjusting the suspension settings making KW coilover struts 100 percent corrosion resistant with an unlimited lifespan. Lowering the suspension using the dirt-insensitive trapezoidal thread in combination with the polyamide composite collar guarantees long driving pleasure. Even after years the stepless suspension lowering is not affected by environmental influences.

RESERVOIR

KW Twin-Tube Technology Knows No Limits

The use of KW reservoirs provides additional volume for additional oil and additional cooling capacity for particularly high-stressed systems. The reservoir, which is filled with low gas pressure, can be fitted anywhere and accommodate the adjustable compression stage valve to provide the damper with more working space.

7-POST DRIVE DYNAMICS TEST STAND

Testing Like in Formula 1

Used regularly by automobile manufacturers and international racing teams, KW’s in-house 7-post drive dynamics test facility optimally tunes the KW coilover suspensions according to the design and target group. The 7-post drive dynamics test facility is essential for perfect fine tuning along with road trials on public roads and race tracks. In objective laboratory conditions, which can be reproduced at any time, we work everyday to give our customers the internationally-esteemed KW driving experience.

UNIBAL TOP MOUNT

Provides More Track Performance Adjustment Options

Depending on the vehicle application, the aluminum uniball top mounts feature scaled camber adjustment and caster can be optionally adjusted. This means that the camber angle can be set, allowing the maximum tire-contact area to be achieved when cornering, making handling even more direct. Please note: increased camber values are only recommended for track day use as they reduce tire lifespan when used on the road.

TECHNICAL COMPONENT REPORT

Certified Safety

The technical component report is always included in the package and outlines the individual options for lowering the suspension of the respective vehicle. Allowing for an inspection and subsequent entry into the vehicle documents to be carried out without any problems. The technical component report also includes precise vehicle classification, requirements, and tips for safe fitting.

KW TVR-A Technology

Twin Valve Rebound – Adjustable

The rebound stage damping is tuned to suit the respective vehicle on our in-house drive dynamics test stand and is set in the mid range when delivered. For custom settings the user has 16 precise click positions at their disposal, allowing them to choose between more comfort or more body control.

The two-step, patented TVR-A technology enables the small volume to flow through an adjustable, conical low-speed bypass in the case of slow damper speeds, while in the case of higher piston speeds, the main rebound stage valve opens for the large volume flows. This pro-vides a big improvement in terms of ride comfort without influencing the high-speed in the safety-relevant range.

OIL FLOW FACTORY SETTING 8 CLICKS

The rebound stage bypass channel is open in a mid-range setting. For slow damper speeds, low oil flows through the bypass in the main valve and the adjustable bypass opening.

The result: a basic setting which conforms to our target parameters for the respec-tive vehicle type and application, and ensures an optimum rebound and deflect ratio.

OIL FLOW DURING HARD REBOUND STROKE

Rebound stage bypass channel is closed. The entire volume of oil is throttled through a setup-specific preset spring valve on the piston. The maximum possible rebound damping forces are achieved.

Result: the sporty/firm tuning of the rebound stage helps to provide even tighter control over vehicle rolling and pitching.

OIL FLOW DURING SOFT REBOUND STROKE

Rebound stage bypass channel is open. The bypass oil quantity is no longer available to the spring valve on the piston, the rebound stage damper forces are reduced in the low-speed range and the lowest possible low-speed rebound damping is achieved.

The result: the low rebound damping increases travel and ride comfort.

HIGH-SPEED CHARACTERISTIC

In the case of high damper speeds and large volume flows the spring-loaded main valve opens in addition. The oil flows through a maximum valve cross section.

The result: the rebound stage setting works in the comfort-relevant low-speed range and has no safety-relevant effect on the high-speed range.

KW TVC-A Technology

Twin Valve Compression – Adjustable

The patented compression stage valve with TVC-A technology features two separate spring pre-tensioned valves for low and high volume flows.

The compression stage which is tuned to the particular vehicle type on our 7-post rig is supplied with a mid-range factory setting. With 12 precise clicks the adjustable compression stage valve can increase or decrease the cross section in the low-speed valve to achieve more or less compression stage damping. At the same time, in the case of sud-den high piston speeds, the spring pre-tensioned needle valve and the spring pre-tensioned main valve open to their maximum cross section, utilizing the blow-off feature to prevent undesired progressive power surges in the high-speed range. This allows for improved bracing of the vehicle body while simultaneously offering more comfort than with con-ventional valve technology in the case of high wheel acccelleration. The compression stage damper setting is always supplied in combination with a separate rebound stage setting, as only one independent 2-way damper setting allows for true performance optimization.

OIL FLOW IN BASIC SETTING 6 CLICKS

The spring-loaded adjustable bypass valve is open in a mid-range basic setting. In the case of slow damper speeds the small volume of oil flow runs through the bypass valve. The spring-loaded main valve is closed in the case of slow damper speeds, thus enabling additional low-speed compression damping.

Result: optimum, vehicle-specific tuning with very good bracing against rolling and pitching.

OIL FLOW DURING CLOSED COMPRESSION STAGE IN DUMP VALVE

Closing the spring-loaded bypass valve results in higher compression stage damping in the low-speed range. The closed compression stage generates a more progressive low-speed compression damping characteristic without influencing the high-speed damping.

Result: a sporty/firm tuning of the low speed compression stage can be used for more bracing against body roll or for deliberate tire warming without influencing high speed damping comfort.

OIL FLOW DURING OPEN COMPRESSION STAGE IN DUMP VALVE

The low-speed compression stage damping is reduced by opening the spring-loaded bypass valve.

Result: the reduced low-speed damping allows for more comfort, e.g. to compensate for a harder tire construction without influencing the safety-relevant bracing of the vehicle in the high-speed range.

BLOW-OFF FEATURE

The main compression stage valve opens in the case of higher damper speeds for a tran-sition to a degressive compression stage damping characteristic. In the case of sudden high speed excitation, the main compression stage valve and the spring pre-tensioned, adjustable low-speed bypass valve open to their maximum cross-section. This takes place independently of the selected low-speed setting and enables the flow of an additional vol-ume of oil.

Result: this blow-off feature means that in the case of sudden high-speed excitation, e.g. driving over curbs or expansion joints on highways, wheel contact with the road is ensured – independently of the selected low-speed damping.

KW TVCLH-A Technology

Twin Valve Compression Low Highspeed – Adjustable

High-end motor sports technology for the most demanding street per-formance and track performance customers. Two separate valves and a 2-way adjustable compression stage valve enable separate compres-sion damping changes for low and high-speed. The adjustments are made via two adjusting dials using incremental clicks in the valve hous-ing which feature 16 setting positions for the high-speed range (with 15 clicks) and 7 setting positions for the low-speed range (with 6 clicks).

During tuning, on the KW drive dynamics test stand, the V4 coilover suspension is tuned to a mid-level basic setting for best road perfor-mance with an additional recommended setting for the occasional track day use. The Clubsport 3-way coilover suspension is tuned to a mid-level factory setting especially for track day use, with an addi-tional recommended setting for the drive to the race track. Starting from the factory setting, the damping can be set harder or softer for low and high-speed. The TVCLH-A technology has a blow-off feature with large cross-sections which allows for high low-speed forces for optimum bracing of the vehicle body without raising the body in the case of wheel-induced high damper speeds (driving over curbs). The separate low and high-speed setting is always supplied with an ad-ditional rebound setting for an independent 3-way damper setting.

OIL FLOW IN BASIC SETTING 8 CLICKS HIGH-SPEEDAND 3 CLICKS LOW-SPEED

KW Clubsport 3-Way Coilover Suspension - Track Setup
KW V4 Coilover Suspension - Street Performance Setup
The low-speed valve is open in the basic setting. At low damper speeds the oil flows through the open bypass. The spring-loaded high-speed pressure disk is closed.

Result: optimum, vehicle-specific tuning with very good bracing against rolling and pitching. The setting enables a good vehicle response to the driving situation. The high-speed valve opens in the case of driving over curbs or expansion joints and allows the deflection of the wheel. The influence of the excitation on the body is reduced, the body remains quieter.

OIL FLOW DURING CLOSED HIGH AND LOW SPEED COMPRESSION STAGE

In a closed low-speed setting the oil flows through the smallest throttle cross-section. At slow damper speeds the compression damping increases.

Result: the adaptation of the damper characteristic to slow body movements such as accelleration out of bends or turning into bends. Adaptations for various tire characteristics are possible in this way. Tire characteristics are an equally possible influence on the cornering behaviour of the vehicle. The closed high -speed range provides the vehicle body with considerably stronger protection against mounds and troughs. The vehicle remains more stable.

OIL FLOW DURING FULLY OPEN HIGH AND LOW-SPEED COMPRESSION STAGE

In an open low-speed setting the oil flows through the largest throttle cross-section. At slow damper speeds the compression damping is reduced.

Result: a reduction in the low-speed pressure reduces smaller jolts and excitations in the body, the comfort is increased. The tire load is reduced. Rolling and pitching are increased. A reduced high-speed damping reduces the “body impact” when driving over curbs.

BLOW-OFF

At higher damper speeds and large volume flows the high-speed valve opens in addi-tion. The oil flows through a maximum valve cross section. This is the transition to a degressive damper characteristic.

HYDRAULIC ELEVATION

Lift Me Up

With KW’s hydraulic lift system (HLS) the body can be raised for more ground clearance at the touch of a button, even while driving. With KW’s HLS, obstacles like speed bumps or steep parking garage ramps can be easily negotiated. The system can be used as a vehicle-specific retrofit solution for OEM dampers or as a complete suspension solution including hydraulic equipment. The KW hydraulic lift system is available for the front axle or for both axles, depending on the application.

APP CONTROL

The KW iSuspension Innovation

With the KW iSuspension apps, customer-specific adaptations can be made simply and intuitively via one’s own smartphone.

1.) First, the DDC ECU coilover suspension app allows a choice of three defined damper setups (comfort / sport / sport+) and second, it allows a complete individual customization of the adaptive dampers during operation.

2.) With the DLC app you can simply choose between a self-defined lowered suspension setting and the standard vehicle height, and precise adaptations can be made to the vehicle height when combined with our DLC air suspension modules.

Both apps are free to download in the Apple and Google Play stores.