Pressure sensors. For pressures up to 1800 bar (180 Mpa)

Transcription

1 B A Pressure sensors 45 Pressure sensors or pressures up to (18 Mpa) Ratiometric signal evaluation (referred to supply voltage). elf-monitoring of offset and sensitivity. Protection against polarity reversal, overvoltage, and short circuit of output to supply voltage or ground. High level of compatibility with media since this only comes into contact with stainless steel. Resistant to brake fluids, mineral oils, water, and air. Application Pressure sensors of this type are used to measure the pressures in automotive braking systems, or in the fuel-distributor rail of a gasoline direct-injection engine, or in a diesel engine with Common Rail injection. esign and function Pressure measurement results from the bending of a steel diaphragm on which are located polysilicon strain-gauge elements. These are connected in the form of a Wheatstone bridge. This permits high signal utilisation and good temperature compensation. The measurement signal is amplified in an evaluation IC and corrected with respect to offset and sensitivity. At this point, temperature compensation again takes place so that the calibrated unit comprising measuring cell and AIC only has a very low temperature-dependence level. Part of the evaluation IC is applied for a diagnostic function which can detect the following potential defects: racture of a bonding wire to the measuring cell. racture anywhere on any of the signal lines. racture of the bridge supply and ground. Only for 5 5 This sensor differs from conventional sensors due to the following diagnostic functions: Offset errors Amplification errors can be detected by comparing two signal paths in the sensor. torage conditions Temperature range...+ C Relative air humidity...8 % Maximum storage period 5 years Through compliance with the above storage conditions, it is ensured that the sensor functions remain unchanged. If the maximum storage conditions are exceeded, the sensors should no longer be used. Characteristic curve. U A = (.8 p / p Nom. +.1)U V Output voltage U A V Explanation of symbols U A Output voltage U V upply voltage bar Pressure bar Pressure p

2 4 Pressure sensors A B Pressure sensors (contd.) or pressures up to (18 MPa) elf-monitoring. Offset and sensitivity. Only for 5 5. U A U V 9% 9% 1 % 4% Error band Limitation, working signal Measuring range Error range Error band Measuring circuit. Pressure sensor 1 % Pressure p Offset error ensitivity error Error range ECU + 5 V (U V ) Pull up resistor ignal (U A ) A/converter and C iagnostic function during self-test (following switch-on). Only for 5 5. Correctness of the calibration values unction of the sensor signal path from the sensor to the A/ converter of the evaluation unit Check of the supply lines. iagram: Characteristic of the output voltage following switch-on unction of the signal and alarm paths etection of offset errors etection of short circuits in wiring harness etection of overvoltage and undervoltage If an error is detected during the sensor s self-test, the signal output is switched to the voltage range > 9%U V. iagnostic function during normal operation. Only for 5 5. etection of offset errors etection of sensitivity errors (with pressure applied) Wiring-harness function, detection of wiring-harness short circuits etection of overvoltage and undervoltage If an error is detected during the sensor s self-test, the signal output is switched to the voltage range >9%U V. 1 GN Range Pressure range ensor Thread Connector Pin imens. Page Part number bar (MPa) Type drawing 14 (14) KV BE M 1x1 Compact 1.1 Gold-plated (5) M 1x1 PA (15) R M 1x1.5 Working circuit ilber-plated M 1x1.5 Compact 1.1 Gold-plated R M 1x1.5 Working circuit ilber-plated M 1x1.5 Compact 1.1 Gold-plated (18) R M 1x1.5 Compact 1.1 Gold-plated M 18x1.5 Compact 1.1 Gold-plated R M 18x1.5 Compact 1.1 Gold-plated M 18x1.5 Working circuit ilber-plated Accessories or 5 5 Plug housing Quantity required: 1 AMP No ) Contact pins for.5 mm Quantity required: AMP No ) Gaskets for mm Quantity required: AMP No ) 1 ) To be obtained from AMP eutschland GmbH, Amperestr. 11, -5 Langen, Tel. 1 / 9-, ax 1 / 9, AMP.Kontakt@tycoelectronics.com

3 B A Pressure sensors 4 Technical data Pressure sensor Pressure-sensor type KV BE R R R R Application/Medium Unlead. fuel Brake fluid iesel fuel or iesel fuel or iesel fuel or iesel fuel or RME 1 ) RME 1 ) RME 1 ) RME 1 ) Pressure range bar (MPa) (14) (5) (15) (15) (18) (18) Offset accuracy U V. %. % 1. %. % 1. %. % 1.5 % ensitivity accuracy at 5 V In range...5 bar ). % 1. %. % 1. %. % of 1.5 % In range bar meas- 1.5 % In range bar ured 5. % ) In range 5... value. % 1.5 %.5 % In range 5....% 1.5% Input voltage, max. U s V Power-supply voltage U V V 5 ±.5 5 ±.5 5 ±.5 5 ±.5 5 ±.5 5 ±.5 Power-supply current I V ma Output current I A µa...ma ma 4 ).5 ma 4 ) Load capacity to ground n 1 1 Temperature range C ) ) Overpressure max. p max bar Burst pressure p burst bar > > Tightening torque M a Nm ± ± 5 ±5 5 ±5 ± ± Response time T 1/9 ms 5 5 Note: All data are typical values 1) RME = Rapeseed methyl ester ) = ull cale ) Of measured value 4 ) Output current with pull-up resistor 5) +14 C for max. 5 h imension drawings pace required by plug, approx. 5 mm pace required when plugging/unplugging, approx. 5 mm W = A/ size bar W ±, 5, ± ±,1 ø 8,5 ø,8 1,5 59,8,8 Ground Pin Output voltage U A upply voltage U V Pin ø 5 9 4,4 M 1x1-g 1,5 ±

4 48 Pressure sensors A B Pressure sensors (contd.) or pressures up to (18 MPa) imension drawings pace required by plug, approx. 5 mm pace required when plugging/unplugging, approx. 5 mm W = A/ size Gasket ate of manufacture -pin plug Ground Pin Output voltage U A upply voltage U V bar W 4 1 ±,1 41 B 4, A 5, 8 ±,,9 ±,5 1,1 ±,,8 -,5 Pin ø5 -,1 M1x1 9 ø,1 1 ø8,5 -,1 ø,8 ±,1 15, ±,1 5, ±, 81 8 W R 1,5 9 ± Pin ø 5 M 1x1,5, -,1 1,5 1 9 ± W R 1,5 9 ± Pin ø 5 4,4 M 1x1,5, -,1 1,5 1 8 ± W 1,5 ± ±,5 Pin ±,1 ø 4,8 M 1x1,5,15 ±,15 1,5 1, ±,,5 ±

5 B A Pressure sensors 49 imension drawings pace required by plug, approx. 5 mm pace required when plugging/unplugging, approx. 5 mm W = A/ size Gasket ate of manufacture -pin plug Ground Pin Output voltage U A upply voltage U V 81 5 W 1,5 ± R 1 Pin ø 5 4,4 M 1x1,5-g, -,1 1,5 ± 1 59, ± 81 4 ø 5 W M 18x1,5-g ø1,,8-9 ± Pin 4,4 1,1 9 ± ,1 1,5 ± ø 5 W M 18x1,5-g ø1, 15 Pin 4,4,5,4 ± ,1 1,5 ± ø 5 W M 18x1,5-g ø1, 15 Pin,5,8 ±