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By Counterman
link hidden, please login to view’s Executive Committee announced it welcoming Robert Roos, effective July 1, 2024, in a show of its focus on North America. Roos is the president & CEO of link hidden, please login to view – APSG and president of NEXUS North America. “With a robust career of over 40 years in the automotive industry, Robert has held key positions that underscore his expertise and leadership,” NEXUS said in a recent press announcement.
According to NEXUS, the appointment “aligns with the company’s increased ambitions in North America, aiming to accelerate the growth plans of N!’s OEM partners and gradually integrate a growing number of North American partners.”
This objective will be supported by a more active presence of the NEXUS team in Grapevine, Texas, at APSG’s headquarters. Besides its “growth accelerator” prime goal, this presence will enable the proactive deployment of NEXUS initiatives such as Mobilion, Marketparts and Smartparts, the company said.
Roos actively participates in multiple industry committees including the Education Committee within The Auto Care Association, The AWDA Board of Governors, and the University of the Aftermarket Foundation, demonstrating his commitment to advancing the automotive sector through collaborative efforts and industry-wide initiatives, NEXUS added.
“I am honored to take on this role at such a significant time for NEXUS. Together, we will continue to drive innovation and growth, ensuring that NEXUS remains at the forefront of the automotive aftermarket industry,” Roos said.
Gaël Escribe, NEXUS Automotive International CEO, said: “We are thrilled to welcome Robert to N!’s Executive Committee. Our focus on growth in this region is encapsulated by our new motto ‘Brightening our future’, which perfectly reflects our vision for growth and innovation in the coming decades.”
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By Counterman
Most active suspension systems come in many styles with fancy names like airmatic, dynamic or advanced. And, it doesn’t matter if it is a BMW, Mercedes or Jaguar, an active suspension must be able to react to three critical pieces of information.
First, it must act on information from the ABS and stability control system. Second, it must measure body movement. Third, it must detect the extent and rate of suspension movement. With these three pieces of information, the suspension can actively adjust the compression and rebound of the shock or strut.
Why would an engineer or automaker include this feature on a vehicle? An active dampener allows for a ride without compromise. The three inputs can be used to detect a rough road or an emergency situation where body roll could change the stability of the vehicle.
Electronic Shocks/Struts
Electronically adjustable shocks and struts use conventional mono-tube and twin-tube oil-filled dampeners. The rods, gas chambers and piston have the construction of passive units. Like a passive unit, they can fail if they leak, the gas escapes or the rods are bent. They can also wear out like a conventional unit as the oil inside breaks down and surfaces in the bore wear.
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What makes these units unique are the valves with their variable orifices. These valves regulate the flow between the chambers on either side of the piston. The piston in some units, however, does not have any valving.
The size of the orifices controlled by electromagnetic solenoids can control the valves very quickly. The electrical connections and solenoids are typically found outside the body and act on the valves inside the unit using magnetism. The signal to the solenoid is pulse-width modulated and varies the voltage to change the size of the orifice.
The valves and solenoids can’t be serviced or separated from the shock or strut. If a problem is detected with the system, the valves go into a fail-safe position that is fixed, and the system becomes passive. The driver is then alerted with a message or light on the instrument cluster or message center.
Most systems will perform a circuit check when the system wakes up. This typically involves sending a signal to fully open and close the valve. If the system detects an open, short or a voltage outside of the specifications, it will set a code.
Measuring Wheel Movement
Ride-height sensors not only measure the position of the suspension, but also the rate of movement. They are supplied with a voltage of around 5 volts. The signal voltage is changed as a magnet moves past a coil. Most sensors have three wires – ground, power and signal.
Internally, it is difficult to damage one of these sensors. Externally, however, the linkage that connects the sensor to the suspension arm can be damaged. Additionally, the connector can be damaged and cause a short or open that sets a code. If one of these sensors is replaced, it must be calibrated after it is installed.
Ride-height sensors are sometimes called suspension-position or wheel-displacement sensors. The data from the sensor is used to measure the movement of the suspension. By knowing how far and fast the suspension is moving, the module can use the information to determine the size of the orifice in the dampener to control compression and rebound. These sensors should be calibrated if a sensor is replaced, a module is reprogrammed or if the battery dies.
Measuring Body Movement
Accelerometers mounted to the body measure changes in the ride. These accelerometers are typically mounted to the strut towers. These sensors output information as gravitational forces, or “G-force,” to a module. Changes in body roll due to cornering will produce lower G-force than a pothole would.
Information from the accelerometers is coupled with data from the ride-height sensor, steering sensor and other inputs by a computer processor in a module. The module can determine if the vehicle is going around a corner or traveling down a bumpy road. With this datastream, the valving inside the dampener can be adjusted in milliseconds for the best control and ride quality.
The accelerometers on the body differ from vehicle to vehicle. Some manufacturers mount the sensors under the headlights, on strut towers and near the taillights. More sophisticated systems use more than two accelerometers mounted in various locations.
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The control module for the electronic dampeners needs more than the movement of the wheels and body to determine the correct settings for the dampeners. The module uses and shares information with the anti-lock braking system, engine control module and instrument cluster. This information is typically shared on the high-speed CAN serial data bus. On some BMW 7 Series models, the information is shared on the fiber-optic Flex Ray bus.
With all this information, the module can do some amazing things with the adjustable dampeners. Problems like nosedive under braking, torque steer and understeer on FWD vehicles can be minimized. If the vehicle has air ride, the volume and pressure inside the air springs can also be tuned along with the valving in the dampeners to optimize ride quality and control.
Most active suspension systems will perform a circuit check when the system wakes up. The system will send 5 to 12 volts to the actuators and ride height sensors. The system is also looking at the resistance in the circuit, and the amount of voltage dropped. If the system detects an open, short or voltage outside of the specifications, it will set a code. Next, the control module will fully open and close the valves in the struts. If the system does not detect any irregularities, the system will go into an active mode.
Looking for these self-diagnostic signals can be performed using a meter. You may have to use a bypass harness or back probe the connector. If the system detects any problems, the system will go into a passive mode.
Sometimes servicing an active suspension is like rebuilding an engine with a new crankshaft and reusing the old bearings and valve springs. When a new active strut is reassembled with the old and tired spring and strut plate, the results can be less than desirable.
Upper strut mounts and bearings can be hammered to death. The upper strut mount essentially supports the vehicle weight and counters both braking and acceleration torque. Most mounts are sandwiches of rubber, metal and bearings. Over time, the rubber can lose its ability to isolate the suspension from the body. Bearings can also seize and bind, causing the vehicle to have steering problems.
Look up the ride height specifications and measure ride height front and rear, and on both sides of the vehicle. If ride height is less than specifications, the problem is most likely one or more weak springs that should be replaced. Springs should typically be replaced in pairs to maintain the same ride height side-to-side.
Weak springs also are more likely to fail. The springs on many late-model vehicles are thinner to reduce weight and have an outer plastic coating to protect the metal from corrosion. If this outer coating is cracked or damaged, corrosion can form a hot spot that eats into the spring, weakens it and eventually causes the spring to break.
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By Counterman
NTN Bearing Corp., the parent company of BCA Bearings and Bower Bearings, announced the addition of Kevin Huckins to the company’s automotive aftermarket sales team.
Huckins is joining NTN’s automotive aftermarket business unit as regional sales manager, Western region.
“We are thrilled to add Kevin to our sales management team,” said Charles Harris, vice president of sales & marketing – automotive aftermarket for NTN. “His in-depth knowledge of the automotive and heavy-duty aftermarkets are an important asset to our organization, and his experience in sales management and ability to navigate our multifaceted distribution channels make him the ideal candidate to take our western region to the next level. I welcome his energetic, get it done attitude, and look forward to empowering his success in this role.”
Huckins, who resides in the Seattle area, joins NTN with an extensive and successful background in sales management in the automotive and heavy-duty aftermarkets, NTN noted.
His experience includes 26 years as an area/regional sales manager for Tenneco on the automotive side, followed by six years as a regional manager for Industrial Parts Depot, where he focused on the heavy-duty aftermarket.
In his role as regional sales manager, Western region, Huckins will manage NTN’s multipronged sales efforts and sales-agency partners for the automotive aftermarket and heavy-duty aftermarket business segments.
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By Counterman
DMA announced the appointment of David Sapp as its new assistant product manager.
During his tenure as an account manager at Auto Plus Auto Parts, Sapp significantly increased local accounts in the Chattanooga area, achieving a notable 15% year-over-year sales growth, DMA said in a news release.
His role as a broker account manager at Capital Waste Services saw him successfully elevate national brokerage accounts by 26% year-over-year and increase local sales in the Chattanooga/North Georgia markets by 18% year-over-year.
Sapp’s leadership as sales and marketing director at Ken Smith Auto Parts Inc. resulted in the development of the online sales program, increasing annual revenue from $600,000 in 2012 to $2.8 million in 2018, DMA noted.
Sapp holds an A.S. in Automotive Technology Management Services from the College of Central Florida in Ocala, Florida, and a bachelor’s in theology from CIMN in Santa Rosa Beach.
“David’s proficiency in product analytics, coupled with his hands-on experience in the industry, positions him as a valuable asset to our product development team,” stated Trevor Potter, DMA chief product & marketing officer.
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