System Descriptions - TPC TIREBOSS 2 Service Manual

System Description
INTRODUCTION
The Tireboss 2 system is a second generation of the TIREBOSS® product, that provides the
ability to change tire pressure in one or more groups of tires while the vehicle is in operation.
The primary improvements in Tireboss 2 over the original Tireboss 1 system are:
• The algorithm by which it measures and controls the tire pressure. This is a significant
advancement by effectively learning how the vehicle air supply and tire groups
are configured and optimizing the inflation and deflation control of the tires, while
continually learning and tuning these parameters during normal operation.
• It also offers the ability to autonomously control tire pressures without operator
intervention where that functionality is required.
• The ability to perform updates and upgrades remotely through Wi-Fi is also incorporated
in Tireboss 2.
OVERVIEW
The Tireboss 2 system consists of the Operator Control Unit (OCU), the System Control Unit
(SCU), and one or more Valve Control Units (VCUs)
The OCU provides the operator interface to the system allowing configuration, selection of
operating modes, reporting of alarm conditions, data logging, remote access and system
maintenance functions. It displays system parameters in a convenient, user-friendly
manner. It is basically a specialized touchscreen computer.
The OCU provides GPS information to the system, most importantly for vehicle speed
(which is used to monitor speed limits for various tire pressures and loads, and initiate auto
inflations in the case of over speed conditions for the current selections), as well as location
information and time for logging purposes. It has an RS-485 interface to the System
Controller, as well as a Wi-Fi radio for data transfer and program updates. The OCU receives
switched power from the vehicle.
The SCU is the heart of the system. It coordinates all aspects of system operation, accepting
commands from and reporting to the OCU as well as controlling the other system
components. It measures air pressures from both the vehicle air supply (for safety purposes)
and from the suspension air bags (if the vehicle is so equipped) for load sensing, providing
Standard Autonomous Operation capability. It also serves as a "black box" data recorder for
critical system information and provides the interface to an optional external data logger.
One or more VCUs control pressure in defined group(s) of tires. The VCUs communicate
with the SCU over a daisy-chained Local Interconnect Network (LIN) bus. The system can
currently accommodate up to 4 valves. Each VCU provides pressure control and monitoring,
automatic heater control (to prevent valve icing in cold temperatures) and fault handling for
one group of tires.
Tire Pressure Control
IV
Service Manual