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Central Tire Inflation System for Off-highway Vehicles Terrain image Pneumatic DivisionParker's Central Tire Inflation System (CTIS) offers improved mobility when operating vehicles in severe off-road or soft soil conditions. Ideally suited for the agriculture and military markets, this automatic tire pressure adjustment system allows the driver to optimize tire inflation pressure from the cab while operating on varying terrains with the simple push of a button. Reducing tire pressure results in a bigger tire footprint, providing increased flotation and traction when operating in soft soil terrain. Although often used in conjunction with all-wheel drive, non-all-wheel drive vehicles with CTIS can actually outperform all-wheel drive in many soft soil conditions.

Operating vehicles with reduced tire inflation pressure is approved by tire manufacturers when operating at reduced vehicle speeds. Contrary to common perception, operating at reduced tire inflation pressure can extend tire life due to reduced susceptibility to tire punctures and tread chunking. CTIS also results in increased fuel economy due to the improved rolling resistance as the tire floats on the surface rather than creating ruts in soft soil or sand.

What's included in Parker's CTIS?

Central Tire Inflation System for Off-highway Vehicles improves traction Pneumatic DivisionEach wheel end is equipped with a CTIS wheel valve. The wheel valve connects the tire to the CTIS control system whenever it is actively measuring or changing tire pressure. Otherwise, the wheel valve is closed, isolating the tire from the system, thus ensuring that the tire will not leak down. This eliminates the need for manually operated shut off valves when the vehicle is inactive for extended periods of time. This feature also provides extended air seal life when the vehicle is in motion and tire pressure adjustment is not occurring. Parker offers wheel valves in a variety of sizes and configurations including valves with hose connections as well as flush-mount hose-less versions for use with wheels that have integral air passages. Located on the vehicle chassis or undercarriage, Parker’s CTIS pneumatic control unit consists of electro-pneumatic valves and pressure sensors required to monitor and control the pneumatic system.    

CTIS provides independent wheel-end control ensuring fail-safe operation in the event of damage to the vehicle or wheel end. The CTIS wheel valve is completely sealed to the atmosphere at the wheel end ensuring reliable deepwater forwarding capability. Tire venting while deflating is routed back through the pneumatic control unit rather than at the wheel end. The CTIS electronic control unit provides decision making and logic execution. The electronic circuitry is completely sealed in an aluminum enclosure resulting in a rugged environmentally robust package.

How does the CTIS work in certain operating conditions such as extremely soft soil for vehicle mobility?

Vehicle mobility is improved by reducing tire inflation pressure resulting in a larger tire footprint. This bigger footprint improves traction, reduces wheel slip and allows the vehicle to float across the soft terrain instead of compacting the soil and causing rutting. When returning to improved terrain conditions, a simple push of a button on the driver interface automatically inflates the tires to the appropriate pressure utilizing the onboard air compressor.

Its unique wheel valve design provides the best in class deflate performance while incorporating the non piloted remote venting control strategy preferred by most vehicle manufacturers. CTIS can deflate tire pressures significantly lower than the competition while operating reliably over a wide range of temperatures and altitudes. The CTIS is insensitive to vehicle installation variables such as wheel-end, the back pressure and air seal flow. This results in enhanced fault tolerance as wheel valve shutoff is assured even with kinked, contaminated or restricted airlines. This is a patented wheel valve design that gets the job done faster, resulting in industry precedent-setting deflation rates. The operator interface provides the ability to select four terrain modes:

  • Highway
  • Cross country
  • Mud, sand and snow
  • Emergency mode

Central Tire Inflation System for Off-highway Vehicles terrain controlsPressing any of the terrain buttons results in the system checking all tire pressures and then automatically adjusting them to pressure targets. A green light on the driver interface will flash while pressure changes are being made and then turn solid indicating that target tire pressures have been reached. The operator can also select from three load levels: no load, partial load and full load optimizing tire pressure for load improves fuel economy, vehicle stability and ride comfort. 

The CTIS monitors tire pressure at regular intervals and offers a run-flat mode which reduces this interval to almost continuously monitor pressure. This is useful when an increased threat for puncture exists. CTIS will return to normal pressure check intervals after a predetermined time has expired. 

The system also monitors vehicle speed and provides both an over-speed warning and an automatic terrain mode bumper to ensure safe operation operators can run in an overspeed condition for a short period of time, for example, to preselect for an impending terrain change continue to over-speed will result in the amber warning led on the selected terrain button beginning to flash. If the vehicle speed is not reduced within an additional time, CTIS will automatically bump up the terrain mode to a more appropriate setting and inflate the tires to the new target pressure. This staged approach allows the operator to pre-select terrains as needed while protecting tires from damage.

Watch the video to learn more and see a vehicle in action:

  Are you headed to IFPE 2020 in March?

Central Tire Inflation System for Off-highway Vehicles - IFPE logo - Parker HannifinParker off-highway and mobile solutions will be showcased at IFPE/CONEXPO-Con/AGG in Las Vegas March 10 – 14. The Parker CTIS system will be on display. The CTIS offers best in class performance, including tire pressure control range and deflate rates with robust full tolerance. Parker is the global leader in motion and control technologies. For more information regarding Parker's central tire inflation systems, contact us.



Central Tire Inflation System for Off-highway VehiclesArticle contributed by Ryan Mills, project engineer, Parker Hannifin's Pneumatics Division.





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How Can Pneumatic Technology Help Farmers Boost Their Crop Yields? Part 1 of 2

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Split Pump IFC on a Wheel Loader: Simply Smarter


Central Tire Inflation System for Off-highway Vehicles

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 The America’s Cup is the oldest trophy in international sports and the highest prize in sailing. Although it has a colorful history dating to 1851, America’s Cup wind-powered racing yachts certainly aren’t old school: the boats use advanced light-weight materials, the latest in nautical design, and aerospace control technology to skim across the ocean’s surface at speeds approaching 50 knots. That’s 55-plus miles-per-hour for landlubbers and the ultimate challenge for the 11-sailor crews that navigate the sophisticated yachts.


Parker is no stranger to the high-pressure competition that fuels the America’s Cup, having supported U.S. teams as an official partner during the last America’s Cup and supplying parts for decades. Following the announcement on January 7, 2019, Parker Hannifin is teaming with a New York Yacht Club-backed entry from the United States called “American Magic.” Parker is the official control systems partner to bring the trophy home to America’s shore in the 36th America’s Cup in 2021. Parker and the American Magic Team will work together to develop and implement state-of-the-art systems for the team’s racing boats. Leveraging a portfolio of proven aerospace and industrial technologies, these systems will enable the advanced yachts with precise control of the lifting surfaces and the wing required to produce optimum performance.

 "Parker is honored to be a part of the American Magic team and to build on our long history with the America's Cup. The motion and control challenges that are presented by this latest generation of foiling yachts are significant and relevant to those that we see in our core business. The opportunity to partner with some of the most talented engineers and athletes on the planet in the crucible of a world-class competition is a recipe for technology advancement, and hopefully some American magic."

— Craig Maxwell, vice president and chief technology and innovation officer for Parker


New monohull design developed under AC75 Class Rule

 Teams will be racing a monohull boat designed under the AC75 Class Rule, which defines the parameters within which teams can design a yacht eligible to compete for the 36th America’s Cup. In addition to shared weight, mast, and sail specifications, the AC75 boats will feature a 75-foot monohull with a T-foil rudder and twin canting T-foils. The objective of this design is to allow the boats to accelerate sufficiently that their foils elevate the hulls from the water to navigate above the ocean’s surface, reducing drag and increasing speed.

The AC75 is a “one-design” vessel, meaning that all teams’ boats use the same design for the main structural elements. The teams can innovate and gain advantage at the system levels of the boats. That’s where Parker Aerospace comes in.


Parker motion controls to optimize American Magic’s performance

Putting 100-plus years of engineering expertise to work and applying a broad range of core technologies, Parker will integrate its controls, hydraulics, and actuators into a key motion and control system that helps American Magic boats achieve stability as each lift onto its foils and accelerates.

According to Mark Czaja, vice president of technology and innovation with Parker Motion Systems, a wide range of Parker products and system-level expertise will help the American Magic boat perform at its highest level. 

“Working with the team's Official Innovation Partner, Airbus – with whom Parker already works closely on several commercial and military aircraft platforms – we are bringing advanced control technologies to the American Magic boats, refining the design of the control system and its components for the rigors of saltwater competition.”

— Mark Czaja, vice president of technology and innovation with Parker Motion Systems


Half-scale boat tested on the water in Pensacola, Florida

 The New York Yacht Club American Magic team has built a boat to half-scale of a race-ready AC75 design. The 38-foot boat—known as “the Mule” to its sailors, designers, and shore crew—has undergone testing in the waters of Pensacola, Florida. The shakedown runs serve to train the crew and provide system-level data that will influence the building of the first full-scale American Magic boat. The first AC75 yacht should be in the water by the end of August of 2019. Data gathered from the first boat will inform construction of a second one; either of the two boats can be used in the Challenger selection events and, ultimately, the America’s Cup.


Challenger selection events to determine who will face Defender Team Emirates New Zealand

 The 36th America’s Cup match will take place in Auckland, New Zealand, in March of 2021. Prior to the America’s Cup, American Magic will compete in the America’s Cup World Series (April 23-26, 2020) and the Prada Cup Challenger series starting in January 2021. These races build toward the 36th America’s Cup over March 6-21, when the competition leader will earn the right to face current cup defender, Team Emirates New Zealand. But there is much to do before that for American Magic—and Parker—to prepare for the next edition of the America’s Cup.

We’ll be blogging throughout the run-up to the America’s Cup race in 2021, keeping readers posted on Parker and American Magic progress toward winning the cup for America.



To learn more about the New York Yacht Club American Magic 36th America’s Cup efforts, please visit the website

 This post was contributed by Zack Cody, project lead and a member of the Parker Aerospace central engineering department. 





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 The industrial manufacturing landscape is transforming against a backdrop of uncertainty. The shifts taking place globally in technology, advanced manufacturing, and government policy changes have created a moving target for manufacturers. This is causing many companies to be cautious. So, what’s an industrial manufacturer to do? To maintain or to create manufacturing competitiveness in our evolving landscape, companies must act now in making strategic investments essential for growth.

The good news? The ongoing focus by manufacturers on research and innovation is paying off for those who apply it strategically. For instance, the cheap labor of the 1990s is giving way to automation technology as the more important factor for manufacturing efficiency.

The not-so-good news? These opportunities are counterbalanced by a global manufacturing environment that is beyond challenging. Fluctuating resource prices, a shortage of tech-savvy talent and growing supply-chain and regulatory risks add to manufacturers’ unease, causing them to grow cautious when boldness is required to assure competitiveness.

 Download our white paper Four Strategies for Assuring Your Company’s Manufacturing Competitiveness for an in-depth look into the emerging industrial manufacturing trends and strategies that you can employ today to create new market opportunities for your company. 


Strategic playbook for growth and success in a globally competitive world

For industrial manufacturing companies looking to grow and succeed in our highly competitive marketplace, making an investment into four strategies creates a potential playbook to act upon.

There’s a technological renaissance that is transforming the look, systems, and processes of the modern factory, and it’s wide-ranging. From the Internet of Things and its 4th Industrial Revolution to additive manufacturing, industrial manufacturing is shedding its skin to become an entirely different entity.

Here are a few of the life-changing advances happening now:

Industrial Manufacturing Competitiveness Requires Strategic Investment -advance manufacturing icon- Parker Hannifin1. Advanced Manufacturing

The Internet of Things (IoT) is well on its way to creating the connected factory of the future. With the adoption and deployment of smaller, less costly sensors, the development of advanced analytics and the commodity storage options provided by the cloud, manufacturers can have wireless/mobile access to data globally - as well as anywhere on the plant floor – facilitating new levels of information monitoring, collection, processing, and analysis.

By expanding the power of the web to link machines, sensors, computers, and humans, IoT enables the data-driven insights and digital connectivity needed to adapt, add to or reinvent business models with the end goal of delivering higher-quality, more reliable products.

Yet there are risks to IoT adoption. Prime among them is the threat of cyber attacks by hackers determined to steal trade secrets and intellectual property. To create an inviolable factory of the future, manufacturers must rethink security standards and provide enhanced security during all phases of manufacturing from design to distribution – even after purchase.

How quickly must preparations be made for the connected factory of the future? IoT factories are predicted to be commonplace within five or ten years. Of course, it’s one thing to invest in transformative technologies when business is good – it’s another when business is off.

Then there's additive manufacturing technology, also referred to as 3D printing. Right now, 3D printing can spur innovation and reduce time-to-market through application to the product development/prototyping process.

Industrial Manufacturing Competitiveness Requires Strategic Investment- Process Optimization Icon - Parker Hannifin2. Process Optimization

While technologies that advance manufacturing are important to competitiveness, most manufacturers identify process improvement as key to company success. That equates to:

  • Reducing production time,

  • Achieving more operational flexibility, and

  • Improving its equipment and layout both in and outside the factory.

To achieve these goals and meet evolving opportunities, companies need to automate, upgrade and streamline. Notably, the impact of automation on global manufacturing, particularly in the area of robotics, cannot be underestimated.

Industrial Manufacturing Competitiveness Requires Strategic Investment - cost reduction icons - Parker Hannifin3. Cost Reductions

Propelled by advanced technologies and the increasing reliability and availability of data, manufacturing competitiveness is upending the factory status quo and creating a highly responsive and innovative global manufacturing landscape. Management must search out innovations that will affect the company’s bottom line. Yet innovations cost money, right? Companies looking to protect their bottom line are pursuing aggressive and proactive cost containment programs that embrace improvements in energy consumption, advances in logistics technology and new materials.

Industrial Manufacturing Competitiveness Requires Strategic Investment_Skill s training icon - Parker Hannifin4. Skills Training

It’s taking manufacturers longer and longer to fill skilled positions - a situation that is likely to continue for the next 15 years. In fact, estimations are that there will be 2 million unfulfilled manufacturing jobs by 2025 in the United States. That means companies will need to act now in order to offset labor shortages later.

A few possible ways to alleviate the problem include:

  • New technology training to upgrade the skill sets of current employees.

  • Recruitment to attract the tech-savvy – otherwise known as millennials.

  • Creating a culture where suggestions for improvements are welcomed and rewarded.

  • Embracing an open-book management philosophy where employees see themselves as partners in the company.


Next steps

 Download the white paper Four Strategies for Assuring Your Company’s Manufacturing Competitiveness for details on these strategies, and the steps industrial manufacturers must take today to capitalize on new market opportunities that await.





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