Sensatas pressure and temperature sensor for R 744

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Sensata’s pressure and temperature sensor for R 744 AC applications A sensor that makes

Sensata’s pressure and temperature sensor for R 744 AC applications A sensor that makes sense BY RENSKE EISSENS

Content Part 1 § Introduction § Sensata Technologies § Cabin comfort solutions Part 2

Content Part 1 § Introduction § Sensata Technologies § Cabin comfort solutions Part 2 • Why sensors? • R 744 AC sensor solutions • Digital output compared to analog • Customer choices Summary RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 2

Introduction RE § Renske Eissens § Product Manager cabin comfort sensor solutions § Based

Introduction RE § Renske Eissens § Product Manager cabin comfort sensor solutions § Based in Almelo, The Netherlands § Email: r-eissens@sensata. com § Phone: +31 546 879 465 2008 -02 -14 VDA Wintermeeting 14/02/2008 3

Sensata at a Glance Leading supplier of sensors and electrical protection with revenue over

Sensata at a Glance Leading supplier of sensors and electrical protection with revenue over $1 billion in 2006 39% 61% Electrical Protection Sensors Technical expertise and proven capabilities Global presence with more than 10, 000 employees Cost advantage through volume scale and best cost producing sites 10% Others 50% Automotive 14% Industrial 19% Appliances and HVAC 7% Heavy vehicle/ Off-Road RE 2008 -02 -14 VDA Wintermeeting 14/02/2008

Cabin Comfort Sensor Solutions • • • Pressure sensors Combined pressure and temperature sensors

Cabin Comfort Sensor Solutions • • • Pressure sensors Combined pressure and temperature sensors Optical (Solar, Twilight, Tunnel) Humidity Defogging Air Quality Comfort & Safety Comfort & Air Quality Comfort & Fuel Economy RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 5

Why Sensors? R 134 a AC >> R 744 AC • Needed information Pressure

Why Sensors? R 134 a AC >> R 744 AC • Needed information Pressure (Optional Temperature) Pressure + Temperature • Used for FAN control Over pressure protection Cooling performance same + temperature same COP* optimization Leakage detection/ diagnostics Heat pump control • Sensor Technology Capacitive Ceramic Strain Gauges, hermetic design • Experience In production since 1987: sold over 150 MIO! Worldwide market leader Technology known within Sensata; samples available Already NOMINATED today! * COP: coefficient of performance Note: the end use of the sensor is in some cases dependent on several other component choices within an AC system, e. g. type of expansion valve) RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 6

R 744 AC Sensor solutions § Dual Analog § LIN § PWM • Accuracy

R 744 AC Sensor solutions § Dual Analog § LIN § PWM • Accuracy Ø Pressure Ø Temperature • Response time Ø Pressure Ø Temperature • Envelope • Needed pins/wires (3, 4 or 5) • Connector type • Others LIN = digital signal; Local Interconnected Network PWM = digital signal, Pulse With Modulation RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 7

Accuracy of LIN Versus Analog (1/4) Sensata believes that on system level, a LIN

Accuracy of LIN Versus Analog (1/4) Sensata believes that on system level, a LIN approach can offer almost double the accuracy compared to a dual analog P+T sensor The Sensata LIN solution offers: +/-1. 0… 2. 0 bar pressure accuracy from 0 … 170 bar +/-3 o. C temperature accuracy @ 0 o. C, 25 o. C and 155 o. C Pressure and temperature response time < 7. 5 ms System error for LIN: Sensing element error Sensing element for dual analog: error System error Analog preprocessing error ADC error (sensor ASIC) Digital domain Additional errors for analog interface ADC error (ECU) Parasitic effects Noise, cabling & passives EMC Analog output stage ASIC The next 2 slides illustrate this with simplified block schematics RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 8

P-Accuracy of LIN Versus Analog (2/4) Sensor S E ADC / DSP Cable ECU

P-Accuracy of LIN Versus Analog (2/4) Sensor S E ADC / DSP Cable ECU Digital communication Noise S E 2008 -02 -14 VDA Wintermeeting 14/02/2008 V+ ECU Analog communication Sensor RE ECU Cable ECU 9

T-Accuracy of LIN Versus Analog (3/4) Sensor NTC ADC DSP REF Cable ECU LIN

T-Accuracy of LIN Versus Analog (3/4) Sensor NTC ADC DSP REF Cable ECU LIN ECU Digital communication Noise V+ ECU Analog communication NTC RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 Sensor Cable ECU 10

Overview LIN Versus Analog § LIN offers higher accuracy over the full pressure and

Overview LIN Versus Analog § LIN offers higher accuracy over the full pressure and temperature range § LIN has a fast response time § Lower cost in overall system and cabeling § Less EMC sensitivity § Additional embedded diagnostics RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 11

Customer Choices § type of signal preferred (LIN, PWM, Analog) § pressure accuracy §

Customer Choices § type of signal preferred (LIN, PWM, Analog) § pressure accuracy § temperature accuracy § preferable size of the sensor § response time § test specifications § total cost at system level Sensata’s engineering team leaders ready to meet demanding requirements: RE Electrical Engineering Mechanical Engineering Tim Tiek Werner Kleissen Title Design Engineer Electronics Title Design Engineer R 744 P+T Phone +31 (0) 546 879470 Phone +31 (0) 546 879 557 Mail t-tiek@sensata. com Mail w-kleissen@sensata. com 2008 -02 -14 VDA Wintermeeting 14/02/2008 12

‘A sensor that makes sense’ RE • Enables optimized AC efficiency (cooling performance) •

‘A sensor that makes sense’ RE • Enables optimized AC efficiency (cooling performance) • Helps maximizing the COP > improves fuel economy and less CO 2 emission • Makes it possible to diagnose filling rate/ leakage detection • Protects components like the compressor and gas -cooler for high pressure and temperatures • Enables heat pump functionality • And, is available today! 2008 -02 -14 VDA Wintermeeting 14/02/2008 13

Thank You RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 14

Thank You RE 2008 -02 -14 VDA Wintermeeting 14/02/2008 14

Pressure and Pressure Scales Pressure A pressure isPressure and Pressure Scales Pressure A pressure is
PRESSURE SENSOR TECHNOLOGY priyatmadi Pressure Definition Static PressurePRESSURE SENSOR TECHNOLOGY priyatmadi Pressure Definition Static Pressure
Temperature Humidity Sensor Temperature Sensor Thermometer A thermometerTemperature Humidity Sensor Temperature Sensor Thermometer A thermometer
Outline Sensor characteristics Sensor selection Sensor comparison SensorOutline Sensor characteristics Sensor selection Sensor comparison Sensor
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