TPMS Presentation - NXP Semiconductors

1 tpms Presentation April 1 2014. FAE. Alan Yang ( . Freescale Confidential Proprietary TM. tpms 7*7 package Agenda Marketing trend How does tpms module work in car Detailed specification of MPX87xx tpms road map and comparison with the other supplier Our enablement resources Q&A. TM. 1. TM. Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, t he Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet, Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ. Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. 2011 Freescale Semiconductor, Inc. Tire Pressure motivated by Auto mega trends Mobility for everyone Cleaner world for everyone tpms is available for all type of tpms allows optimum tire vehicles including truck and inflation and thus fuel busses consumption and CO2 emission Scalable solutions reduction Multiple pressure ranges Maximizes tire life Multiple rotation axis European and Korean legislation Multiple RF frequencies driven by CO2 reduction Safety for everyone Always Connected Prevent roadside breakdown and Provides accurate tire data to the risk of road congestion driver US tread act to prevent roll over Filling assistant app on smart accidents phones Future possibilities to link tire Fleets & Truck: enables better tire information with chassis and management ADAS system TM.)

2 3. tpms legislation around the world Region Requirements USA Regulation from 2005: FMVSS138 mandates tpms for new vehicles starting from October 1st 2005. European Union Regulation from 2012: EC661-2009 mandates tpms starting Nov 2012 for new type approved vehicles and for all new vehicles starting from Nov 2014: tpms will be tested as part of the new EU standardized plan for vehicle periodical inspection S. Korea / Japan Regulation from 2013: tpms vehicles to be installed on passenger cars from January 2013 for new model and January 2015 for existing model Russia, Kazakhstan, Valid from 2015 onwards & replaces nation legislation Belarus (Eurasia). Indonesia, Israel, Require European whole vehicle type approval for vehicles imported from Malaysia, Philippines, Europe. As a consequence tpms will be required for all new vehicles in Turkey November 2014. China Recommended specification Enforcement Standard in Preparation TM.

3 4. tpms potential market size 100 Million new cars sold per year by the end of the decade 4 wheel per car + spare tires + winter tires Module Replacement market 1 billion cars on the road worldwide Great aftermarket opportunity Great potential for tire mounted solutions Heavy trucks, busses, motorcycles Market outside of transportation requiring battery operated wireless pressure sensing TM. 5. MPXY8700 Packaging Gcell Pcell MCU + RF. QFN 9 x 9 mm Cavity Package (Cross Section). Gel Selective encapsualtion Metal cap Plastic Plastic housing Gcell housing Gel Pcell Plastic flag Leadframe Not to scale. For illustration purposes only. TM. 6. TM. Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, t he Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. Pat. & Tm. Off.

4 BeeKit, BeeStack, ColdFire+, CoreNet, Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ. Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. 2011 Freescale Semiconductor, Inc. Tire Performance Issues Worsening until around ba, then improvement due to bell formation of tread Aquaplaning (water depth >2 mm). centre inwards (at rated load). General durability Reduced with lower pressures A reduction by bar results in a worsening of 15 km/h in endurance ( Test Stand durability Failure at 185 km/h instead of 200 km/h). A reduction by bar results in damage sustained at 20% lower speed ( at Resistance to curb impact 40 km/h instead of 50 km/h). The limit value for unseating of bead from rim lies between the operating Bead unseating from rim pressure and 1 to bar.

5 For safety reasons, this should never be lower Wear A tire with 20% lower pressure has a running life around 30% less Rolling Resistance A reduction by bar results in an increase in rolling resistance of around 15%. A deviation of 1 bar from normal pressure (2 to bar) worsens the noise level Tread Noise by 2 dbA (66%). On a mid-class car, an air pressure deviation of bar from one axle is Handling on dry and wet surfaces noticeable. (Source: Michelin Tires). TM. 8. Tire Performance Issues 100. 80 108 140. Rolling Resistance (%). Service Life (%). 60 106 130. Fuel Use (%). 40 104 120. 20 102 110. 0 101 100. 120 110 100 90 80 70 60 50 40 30 Tire Pressure (% of Specified) Tire Pressure (bars). Decreased Tire Life with Increased Fuel Use and Lower Pressure Rolling Resistance with Lower Pressure (Source: Continental Tires). TM. 9. Pressure Accuracy Measurement accuracy target varies with OEM.

6 Typical accuracies better than 8-10 kPa ( psi). Typical resolutions of 1 to 2 kPa ( psi). Accuracy over temperature, supply voltage and life of the tire/system Must warn based on the correct Cold Inflation Pressure (CIP). specified for the vehicle CIP limits usually set in the chassis receiver for a specific vehicle TM. 10. Pressure Accuracy Effects of absolute vs. gauge pressure at altitude In tire sensors measure absolute pressure Typical tire gages measure differential (gauge) pressure relative to the atmosphere CIP is defined as the pressure of the tires after the has been stopped for at least 1 hour The corrected pressure using the Ideal Gas Law is not used It is not the mass of air present setting tire performance It is pressure of the air that defines the load carrying capability and performance of the tire Generally accepted to use absolute pressure with a fixed atmospheric offset (approx 100 kPa = psi).

7 TM. 11. tpms System Solutions Direct (Measure Pressure in the Tire). Useabsolute pressure sensor inside the tire volume Communication via LF and/or RF links Mounted inside the tire/wheel On the wheel (valve stem or drop center). On the tire (side wall, bead area or tread belt). Powered by energy source Internal battery Source other than battery (battery-less). Indirect (Measuring Some Other Parameter). Infer under-inflation by using parameter other than pressure sensing Wheel speed variations Ride height variations Tire vibration variations No power source required on the wheel/tire TM. 12. Tire Pressure Monitor Systems: Indirect Measuring Implemented through ABS wheel speed sensors ABS system is able to measure individual wheel speed and compare it against other wheels If a wheel is moving faster, it is very likely it is under-inflated . TM. 13. Tire Pressure Monitor Systems: Direct vs.

8 Indirect Direct Indirect Precision . Reaction time . Detection of multiple . faults Position-dependant . pressure warning Robustness under . different driving conditions Number of additional . components System cost . Required driver . interaction Additional comfort . features TM. 14. Tire Pressure Monitor Systems: Indirect Measuring Like Hardware reuse (ABS system). Cheap Don't like Measurement relative to other tires Can only sense One under-inflated tire Three tires are under-inflated Two diagonally-positioned tires are under-inflated Will not work with under-inflated tires 2 on the same axle 2 on the same car side All 4. TM. 15. Direct tpms Mounting Methods Tire Wall Tire Tread Mount Valve Stem Mount Drop Well Mount TM. 16. tpms Architectures Other Direct tpms system features in the marketplace Display actual individual tire pressures Tire Localization . determine location of tire on car Auto-Learn.

9 Determine tire IDs on the car Initiation . triggering a pressure reading on demand Motion detection to change monitoring rates Motion detection to save battery power when parked Diagnostics for manufacturing and field service TM. 17. Sensor Package Comparison Competitor Freescale Freescale MPXY85XX MPXY87XX. /MPXY86XX. PG-DSOSP-14-6. X X mm MPXY85xx/86xx smaller in size will QFN help on module's size, weight and cost. TM. 18. 18. Top Level tpms Model Coil LF LF. 3V Motion Receiver Signal Batt Sensor RF. Pressure Energy Ant Sensor Controller RF. Transmitter Temp Sensor TM. 19. Tire Pressure Monitoring Body Receiver Stand along tpms display Cluster Infotainment Antenna RF. Receiver MCU & LF. General Control 24 psi Systems Stand along tpms receiver Or RKE System Basic MIL. Or PKE System Systems TM. 20. TM. Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, t he Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc.

10 , Reg. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet, Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ. Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. 2011 Freescale Semiconductor, Inc. FXTH87xxxx6T1 Tire Pressure Monitoring System 16K Flash LVD BG LFR Microcontroller Detect and Decode Wakeup Timer S08 core, SGF technology 512b TPM 16 kB SGF flash (8kB firmware, 8kB. OSC 8 MHz RAM 2-ch customer), 512B RAM, 64 parameter registers LFO 1 kHz 10 bit ADC, temperature sensor and thermal Register 10-bit ADC. 64 Bytes Temp Sensor restart 1-channel LF detector and decoder Temp Restart S08 Core 8 MHz clock, 2-ch timer, 1 kHz LFO. UHF TX Integrated RF transmitter 315 / 434 MHz C to V. BDM Frac-N PLL based transmitter, 315/434 MHz FSK/ASK modulation Manchester or bi-phase encoding Pressure Cell XZ-axis Accel -1dBm to +8 dBm output power Design Considerations: Pressure Sensor CMOS capacitive p-cell w/o signal conditioning RF Tx (7mA @ 5 dBm).