Tractor

Poclain Hydraulics braking solutions demonstrate reliability, reactivity and flexibility to meet your requirements for complete tractor braking solutions in line with your market’s regulations.

With the combination of heavier and faster machines continuing to trend, our focus is on safety expectations and requirements to increase your braking power. Proven designs are available specifically for your tractors in the AG market where hydraulic power braking solutions can help you meet for those objectives.

Our latest innovative electro hydraulic solutions are paving the way for intelligent and autonomous machines, adding smart control alongside with conventional and proven solutions in order to reduce validation impacts and improve safety.

Various options are covered:

• 2WD or 4WD braking
• Automatic disconnection right/left
• Park lock management
• Up to 40kph compliance
• Open center or closed center braking systems management

Our solutions are in line with latest braking regulations for the agriculture market (EU 2015/68).

With references and a history of proven success on mid and large size tractors, you can trust Poclain Hydraulics braking solutions. We meet your needs for your tractor design’s complete braking system. Poclain Hydraulics braking solution are optimized for your machine performance, providing valves and combinations for main braking functions like:

• Trailer braking control valves on your tractors
• Steering assist braking
• Park lock
• Accumulator charging

Our innovative electrohydraulic solutions

Poclain has developed braking solutions for tractors based on an electrohydraulic design. This universal design allows you to fine-tune parameters to each model’s or machine size’s performance.

Our innovative braking solutions can cover not only your current requirements, but also opens the door for you to use them on future machine iterations, starting with trailer braking:

• Improvement in control and supplementary lines
• Tougher braking curve for high speed > 40kph
• Breakaway management
• Park brake test
• Load depending braking rates for trailers

This electrohydraulic braking offer is ready for use and in line with future braking architectures that will require direct or remote brake piloting. Poclain’s brake solutions open the possibility to be used with other vehicle dynamics control systems for the best operator driving experience.

Electrohydraulic trailer brake valves - VBT

Poclain Hydraulics provides programmable designs and solutions to control either single or dual line braking valves with our VBT valve range. Product parameters can be electronically controlled and adjusted to deliver optimal performance on various machine sizes.

Trailer braking function can be provided with a modular braking solution, or in one compact package.

A single valve for use across your range of tractors/machines

Concept frame:

• Electro hydraulic piloting and proportional braking
• Via integrated ECU or machine-embedded ECU
• With integrated hydraulic redundancy
• OVERRIDE - Electric emergency stop (on/off or prop.)

Nominal technical parameters:

• Pressure supply up to 220bar
• Trailer brake pressure up to 130 bar
• Flow to the brakes up to 70l/min

The Poclain solution is bringing benefits to you, when it comes to ease of use, system compatibility and enhanced safety controls.

Ease of use:

• Settings can be fixed at the last minute just by software parameters
• Adjustable to machine performance needs
• A single valve across your tractor range
• Automatic trailer accumulator filling

Compatibility:

• Open center or closed center configurations

Safety controls:

• Enhanced park brake test function
• Proportional braking even in secondary/emergency braking mode
• Leakage stop after detection on the control line

2WD and 4WD with the steering assist brake valves

VB3-0D0 Steering assist brake valves are available in compact and all-in-one design with integrated electro control valve to cut off steering assist braking (right/left side braking) at high vehicle speed.

We use an electro-hydraulic control of steering assist function that meets the EU regulation with mandatory automatic connection of right and left braking circuits above 40 km/h for both two wheel braking (2WD) or four wheel braking (4WD). Also, trailer brakes are enabled above 12km/h.

Braking actuation remains mechanical via pedals.

For other two wheel braking (2WD) tractor global markets outside of the EU, we provide steering assist brake valves without integrated electronic control that are even more compact.

VB3- OBO, two-wheel braking                 versus                  VB3- ODO, four-wheel braking

VB3-ODO valves allow:

• Braking to both axles (dual circuit: F1/F2 + PTAV)
• Electrical control right/left connection for road mode
• Automatic disabling of front brakes when assisting in turning

Park brake modulating valve i.e. Parklock electrohydraulic brake valve meets EU regulation

Poclain‘s park lock brake solution has long integrated an electro hydraulic design, upgraded for EU regulation requirements, with our VB3-00E offer.

We can provide an optimal selection of two types of designs, compliant with the EU market regulations, depending on the machine’s brake system architecture. This is how we help you meet optimal expected machine braking system performance.

• Emergency / park brake actuation
• Electrically piloted park lock
• Pressure supply up to 250bar
• Park brake pressure up to 160bar

The direct benefits of this offer:

• Selection of 2 valve design concepts
• Selection of different actuators
• Customization of pulling force
• Enhanced park brake function

Accumulator charging and priority valve

The accumulator-charging valve for tractor is available in many forms, as standalone or combined with other functions.

For example, the VFR-200 [range], is a compact block that combines:

• Priority valve -> to charge accumulators instead of auxiliaries
• Cut in /cut off valve – maintain A pressurized
• Engine start LS unloading
• Up to 200l/min to auxiliaries
• Pressure max 210 bar; min 22 bar
• 5l/min flow to accumulators

Other combinations are also available upon request.

Getting ready for autonomous and smart tractors

With its electrohydraulic braking evolutions, Poclain Hydraulics supports your advanced control systems. Electrohydraulic (EH) braking is an opportunity for the braking system to become intelligent and leaves options open for future designs.

As reliable partners, with the proactivity and flexibility to meet customers’ requirements, we are excited to share with you how we can help you meet new market regulations and better answer end-user safety and comfort demands. With our solutions, you can deliver more benefits to your customers:

• User friendly
  • Braking rate adjustable to the working conditions
  • Hill start
  • Automatic braking, according to steering radius, if speed is too high
• Increased safety monitoring
  • Collision detection, override signal
  • Brake failure detection
  • Wear detection
  • Jackknifing prevention
• Advanced braking compatibility
  • Traction control (ASR)
  • Anti-blockage system (ABS)
  • Load dependent braking rate by wheel Y
• Versatility
  • Autonomous vehicles
  • Robotization compliant

Learn more about our tractor solution and contact our experts