May 4, 2024

Maximizing Efficiency and Versatility: Acela’s Monterra Central Tire Inflation System (CTIS) Explained

Acela’s Monterra chassis provides access and reliability. In the realm of heavy-duty vehicles, especially those navigating rugged terrains and challenging conditions, the Central Tire Inflation System (CTIS) is to accessing rugged terrain. While initially exclusive to military applications, CTIS has now made its mark in various industries, from construction to forestry, offering unparalleled versatility and performance enhancement. The Monterra is the only commercially available truck with CTIS.

Imagine a construction site where heavy machinery needs to traverse both on-road and off-road terrains seamlessly. CTIS-equipped trucks become indispensable assets in such scenarios. Vehicles can be driven at highway speeds to the site, then drop tire pressure to safely navigate off-road. Similarly, in mining and forestry operations, where terrain conditions vary widely, CTIS ensures optimal traction and maneuverability, enhancing productivity and safety.

What sets CTIS apart is its ability to automatically adjust tire pressure with the push of a button from inside the cab, allowing drivers to optimize performance based on terrain conditions while in motion and without disrupting operations. This feature eliminates the need for manual intervention, ensuring smooth and efficient operation even in the most challenging environments. The system provides guidance based on speed if pressure needs to be adjusted, minimizing operator misuse. For our mining customers, the ability to keep operators in the vehicle reduces downtime while still allowing for adjustments to the equipment. Whereas other heavy equipment requires manual interventions, the Monterra can be easily transformed from an off-road piece of heavy equipment into a true on-road, comfortable work truck.

Each wheel end is equipped with a CTIS wheel valve. The wheel valve opens and connects 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 and ensuring there are no leaks. This eliminates the need for manually operated shut-off valves when a vehicle sits idle for extended periods of time. This feature also helps extend air seal life when the vehicle is in motion and tire pressure adjustment is not needed.

CTIS systems also use bead locks to prevent beads from “breaking” off the wheel when maneuvering at low speeds so 2-piece wheels are usually used to best accommodate the bead lock installation. They also provide for tire changes in the field without traditional tire changing equipment.

Furthermore, CTIS-equipped vehicles can outperform traditional all-wheel-drive vehicles in soft-soil conditions, highlighting the system's effectiveness and versatility. This capability has led to widespread adoption in tactical military vehicles worldwide, a testament to the system’s reliability and performance.

The integration of CTIS offers a myriad of benefits across various industries. Firstly, it reduces the need for additional specialized equipment, such as tracked vehicles, in certain applications. This not only translates to cost savings but also streamlines operations by minimizing equipment logistics and maintenance requirements.

Moreover, CTIS significantly reduces soil compaction and rutting, particularly in environmentally sensitive areas. By maintaining better worksite roadways and minimizing damage, CTIS contributes to enhanced site safety and reduced rehabilitation efforts, further underscoring its value in sustainable practices.

The Monterra’s Central Tire Inflation System (CTIS) represents a paradigm shift in vehicle mobility and performance. Its ability to adapt to varying terrain conditions, coupled with its unique features and benefits, makes it an indispensable asset across industries. From construction sites to remote forestry operations, CTIS-equipped vehicles set a new standard for efficiency, cost-effectiveness, and environmental responsibility. As technology continues to evolve, CTIS remains at the forefront of innovation, empowering industries to thrive in the face of adversity.


Thank you for your interest in Acela Truck Company. To request a quote, please complete the form below. We will respond within one business day. If you have a more urgent request, please call us at (800) 940-0508 for immediate assistance.

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