Why Choose Steer-by-Wire (SbW)?
- Simplified Manufacturing: Removing hydraulics from the cab simplifies the steering column and the installation on the manufacturing line.
- Improved Visibility & Ergonomics: With the simplifed design and flexible mounting of the steering input device, either a joystick or a wheel, visibility for the operator is improved and also noise in the cab is reduced.
- Programable Special Features: Customizable features including the center point feel point, adjustable end stops, velocity-based feedback, and pressure-based resistance.
- Reduced Costs: Removing the hydraulics and lines from the cab can subsequently decrease labor and installation costs.
- Transition Autonomy: Electric controlled steering systems are a necessary step towards remote or automated machine control.
Advantages of Steer-by-Wire
Steer-by-Wire enables technology for autonomous operation, allowing mobile machines to switch between operator and autonomous (or remote) driving modes more seamlessly.
Functional Safety for Mobile Machines
What level of functional safety is required with Steer-by-Wire? Mobile equipment manufacturers must perform their own risk assessment of their machines and determine what steering system is best for each machine type. Learn more about Parker’s approach to functional safety.
Why Choose Parker as Your SbW Partner?
Steer-by-Wire means no more hydraulics in the cabin – in other words simplified connections, easier installation, and less cabin noise. With no need for a steering column, the driver environment can be shaped without compromise. The software-based controls make it easy to comply with existing and upcoming safety legislation, while also offering new levels of precision and efficiency. Performance is maintained in case of a failure, and any probability of unintended steering is minimized.
Our Steer-by-Wire components have been developed for systems with joystick control and/or an electronic steering wheel. These can be placed anywhere you like, since there is no mechanical connection to the chassis. The synergy between the SbW Tactile Feedback Device, Mobile Directional Control Valves, and software creates a complete steering solution that offers:
- Enhanced Operator Experience: The combination of tactile feedback and adaptive control ensures that operators can navigate complex environments with confidence and precision.
- Improved Safety: Real-time adjustments and diagnostics contribute to safer operations, reducing the risk of accidents and equipment failure.
- Optimized Efficiency: The integrated system maximizes hydraulic performance while minimizing energy consumption, leading to cost savings and improved productivity.
In the graphic, you can see a range of Steer-by-Wire components in sub-systems designed to serve a broad range of applications.
"We leverage our application understanding with component and systems knowledge to develop solutions based on performance needs."
- Mark Schoessler, Parker Mobile Solutions Engineering Manager
Video
Enabling More Efficient Machines
Parker’s next-generation Steer-by-Wire system meets safety standards, operates more efficiently with fewer moving parts to maintain, and operates with less operator effort in a more spacious, quieter cab. It is powerful enough to handle mobile equipment that operates in tough terrain and has superior energy efficiency and precision compared to conventional hydraulic systems.
A Closer Look: Sub-System Components
Input Devices, Control Logic, and Output Devices
SbW Tactile Feedback Device
INPUT DEVICE
The SbW Tactile Feedback Device (TFD) is a cutting-edge component designed to enhance operator interaction with the steering system. Key features include:
- Reliable Steering Sensor: Communicates steering position while meeting the relevant functional safety requirements of various industries (SIL2/PLd).
- Real-Time Tactile Feedback: Provides immediate tactile response to steering inputs, allowing operators to maintain awareness of vehicle dynamics and improve control.
- Ergonomic Design: Engineered for comfort, the device reduces operator fatigue during extended use, increasing operator productivity and ergonomic efficiency.
- Durability: Built to withstand harsh environments, the TFD ensures long-lasting performance and reliability in demanding applications.
IQAN-LST Analog Single Axis Lever
INPUT DEVICE
Parker's IQAN-LST is a mini, paddle style, single axis joystick for the mobile market. The LST can be easily mounted in the armrest or on the dashboard in mobile vehicles.
- Dual Feedback: The dual sensors provide 0.5 - 4.5 Vdc and 4.5 - 0.5 Vdc outputs which allows error checking to meet high safety requirements. All inputs and outputs are protected against short circuit to ground.
- Ergonomic Design: Covered with friction rubber on either side, the spring centered lever prevents fingers from slipping and provides a comfortable feel.
- Durability: Designed for the outdoor environment, the electronics are potted and the cable has a choice of a Saab-sealed AMP junior-power timer connector or a Deutsch DT series transportation connector.
SbW Force Feedback Device
INPUT DEVICE
Parker Lord's fully-active Force Feedbck Device (FFD) further enhances operator confidence by offering automotive-like steering performance to boost operator comfort, as well as additional design flexibility to OEMs.
- Active: By combining our SbW TFD technology with an electric motor, our FFD provides the best of both worlds including smooth tactile feedback as well as enhanced operator feedback features like return-to-center, wheel buzz, and autonomous command following..
- Programable: Through software adjustments, OEMs can customize steering feedback responsiveness and features to create unique operator experiences tailored to each machine type and end use application.
- Safe: SIL2/PLd, fail-operational, dual isolated channels (2 sensors per channel) provides safety redundancy.
MC4 Master Controller Family
CONTROL LOGIC
Three versions are available and can be used in different ways to meet the requirements of any system.
- Functional Safety: Parker designed these to be either a performance optimized standard controller or an IEC 61508 SIL2 Functional Safety (FS) variant. When applying EN ISO 13849-1 for safety functions, the FS variant can be used as a PLd subsystem.
- Environmental Protection: To meet the harsh environments and high vibration applications of mobile machines, the MC4 uses the Molex MX123 high reliability connector system. The enclosure is rated IP65 + IP6K9K and it has a rugged mechanical design, sealed for outdoor use.
- Certifications: The MC4 family has CE and E-mark certifications.
IQAN Design Steering Functions
CONTROL LOGIC
IQAN Design Steering functions allow for the building blocks for your custom steering system.
- Flexible: Preprogrammed software functions can be configured to meet a variety of steering requirements. Prebuilt functions like calibration and diagnostics provide tools for robust and reliable development.
- Fast Development Speed: Prebuilt functions allow for drag and drop development for custom steering applications.
- Parker Support: No two machine steering systems are identical; Parker technical experts are available for help in the design of your next steering system.
IQAN Support
CONTROL LOGIC
The IQAN software suite is the leading solution for creating electronic controls for mobile machines and Parker's IQAN forum is the place to share ideas and discuss IQAN related questions.
On this site, you can find:
- The latest hardware and software news
- Software downloads & videos
- Links to training
- Frequently asked questions
- And a community of users with categories of helpful discussion
Check it out!
Compact Cartridge Manifolds
STEERING CONTROL VALVES
Parker’s compact cartridge manifolds can provide compact and efficient design to fit into any machine.
- Compact: This compact custom design integrates into your machine’s architecture with minimal changes to the machine structure.
- Integrated Sensors: Integrated sensors are an available option for enhanced diagnostics.
- Flexible: Custom manifolds provide steering and can also incorporate other custom machine functions.
SBW Mobile Directional Control Valves
STEERING CONTROL VALVES
Parker's SBW Mobile Directional Control Valves are integral to the steering solution, enabling precise control of hydraulic flow and pressure.
- High Flow Capacity: The SBW110 handles flow rates up to 110 LPM for responsive steering and quick adjustments, enhancing maneuverability and operator confidence.
- Integrated Electronics: With built-in electronic controls, the SBW110 offers advanced features like proportional control and real-time feedback, ensuring seamless communication with the SBW Tactile Feedback Device.
- Flexible Levels of Performance: Compliant with ISO 13849 up to Ple Architecture. Fail Safe & Single Fault Tolerant Valves available.
L90LS BEN Inlet
STEERING CONTROL VALVES
Parker's L90LS with BEN inlet includes a flow disable valve to allow for use safety critical functions. Load Sense and compensation allow for easy integration into existing machine hydraulic systems.
- Fail Safe: When specified with a BEN option inlet and spool position sensor, the L90LS valve can be used in applications where the main pump flow can be bypassed to tank. This allows for fail safe operation.
- Maximum Control: When specified with a pressure compensator and spool sensor, flow to a steering cylinder can be precisely controlled for critical steering commands.
- Versatile: Valve can be integrated with other machine functionality as part of a multiple section directional control valve.
Discover SbW
Contact Parker
Parker’s steering solutions are designed to enhance the performance and safety of off-highway equipment. With our commitment to innovation, quality, and customer satisfaction, we are your ideal partner for steering technology. For more information about Parker’s steering solutions, please contact your local Parker Distributor.