TPI - the most powerful indirect tire pressure monitoring system
Indirect detection of pressure drops in one, two, three or four tires
Determines tire inflation pressure using wheel speed signals
Delivered as a software component
75% of flat tires are caused by under-inflation or slow leakage and tire problems are the third most common reason for passenger vehicle breakdowns. Fuel consumption increases 1.5% and the life span of a tire decreases 15% with every 0.2 bar the tire is under-inflated. Approximately 20% of all passenger cars have tires which are under-inflated by up to 40%. NIRA Dynamics has the solution to these problems: An indirect tire pressure monitoring system called TPI.
TPI was introduced in Europe in the Audi TT during 2006 and in USA in the Audi A6 during 2008. TPI fulfills the FMVSS 138 and the ECE R-64 requirements for TPMS.
With TPI, the driver will be alerted if any of the tires is under-inflated long before the tire breaks down. This improves safety. It also improves economy and decreases the environmental impact since tire wear and fuel consumption are reduced when tires are correctly inflated. TPI is a software solution which determines the tire inflation pressure from the wheel speed signals and does not require any in-wheel pressure sensors and RF components. TPI is therefore very cost effective and easy to integrate into different target system
The performance of TPI is comparable to a direct sensor-based system, but at a significantly lower total cost.
TPI is capable of detecting pressure drops in one, two, three, or even up to all four tires. After detection of a low pressure condition, the system can point out (isolate) in which tire or tires (up to all four) that are under-inflated. The system is very robust against surface changes, load variations and driving styles. Also, TPI automatically adjusts to different types of tires: summer tires, studded winter tires, run-flat tires etc.
A smarter solution for tire pressure monitoring
- Increased safety
- Reduced fuel consumption
- Reduced tire wear
No in-wheel sensors needed!
- Low cost
- High performance
- Fulfills FMVSS 138
NSC improves driveability and provides increased steering power over lateral forces
Today's cars are being improved progressively while also evolving to become safer than their predecessors. Apart from passive collision impact systems, modern cars also have active support systems, exemplified by anti-lock brakes and anti-spin systems. NSC is an anti-spin system which is probably the most sophisticated on the market. To achieve increased stability and safety, the system employs an advanced digital sampling technique to achieve extremely fast torque reduction.
The most sophisticated anti-spin system on the market
NSC offers lower environmental impact due to reduced tire wear and fuel consumption. A self-calibrating tire function compensates for differences in tire wear, tire type and for changes of tires. The system's high-sensitivity makes better wheel spin detection possible with a resultant improvement in spin control.
NSC works by temporarily reducing engine torque through controlled inhibition of the fuelinjection pulses. An advanced digital filtering technique makes it possible to achieve extremely short response times. For example, when driving on icy surfaces at 160 km/h, the system initiates a torque reduction within a distance of 25 cm!
A self-calibrating tire function compensates for differences in tire wear, tire type and for changes of tires. The system's high-sensitivity makes better wheel spin detection possible with a resultant improvement in spin control.
Optimize stability and safety with anti-spin control
- Increased safety
- Reduced fuel consumption
- Reduced tire wear
No additional sensors needed
- Extremely fast torque reduction
- Increases stability and improves handling
- Features utomatic tire calibration
NSC received the prestigious Volvo Technology Award in 1997, and was until year 2004 featured in the Volvo S40/V40 models under the name DSA (Dynamic Stability Assistance).
NSC is since the beginning of 2007 in series production and featured in a new line of motorcycles from one of the worlds' leading motorcycle manufacturers.
MAP - a positioning system that combines smart use of in-vehicle information and digital map information
Today virtually all navigation systems rely on satellite positioning systems like GPS. Other positioning technologies include dead reckoning, map matching, and GSM positioning (positioning of cellular phones). Most of these, however, have too poor performance to be interesting in vehicle applications. For example are dead reckoning and map matching only used in various combinations together with GPS and GSM positioning is basically only interesting in applications like yellow pages services and other M-commerce services due to its rather modest positioning accuracy (typically 100-500m).
High accuracy positioning that does not require GPS
The MAP system calculates the absolute position of the vehicle using advanced sensor data fusion of dead-reckoning information and the available digital map information. MAP can be configured to run with or without support from external positioning services such as GPS or GSM positioning. Thanks to the advanced sensor data fusion techniques employed MAP always delivers statistically optimal position estimates, regardless of configuration.
Autonomous: Calculates the absolute position of a vehicle using information from a digital map and in-vehicle sensors only
Flexible: Can be used stand alone or together with GPS
Accurate and robust: Positioning accuracy can be improved in cases where GPS coverage is poor
When run stand alone using conventional, commercially available map databases, MAP gives a positioning accuracy comparable or better than most GPS based systems. The independence of GPS further means that MAP does not run into problems in situations like when driving in tunnels, in parking garages, near high buildings and so on, where the GPS accuracy and availability often is poor.
When combined with GPS, MAP can be used to create a better and more reliable positioning system, which combines the best features of both GPS and the infrastructure-independent MAP system
A combination of GPS and MAP ensures high positioning accuracy, high robustness, high availability, and an interesting flexibility for the integrator.
MAP is delivered as a software component with fully documented standardized software interfaces (APIs). MAP can be delivered in different configurations and can be ported to different targets.
- Delivered as a standardized software component with fully documented and easy-to-use APIs
- Can easily be ported to different target processors and systems
- Can be delivered in many different configurations adapted to available sensors