• Author / Uploaded
• Giuseppe Donato

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• Sensor
• Electrónica
• Componentes eléctricos
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• Ingenieria Eléctrica

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A

Pressure sensors

45

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


Ratiometric signal evaluation (referred to supply voltage).
Self-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.

Only for 0 265 005 303 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. Storage conditions Temperature range –30...+60 °C Relative air humidity 0...80 % 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. Explanation of symbols UA Output voltage Supply voltage UV bar Pressure

Characteristic curve. UA = (0.8 · p / pNom. + 0.1)UV

V 4.5 4 Output voltage UA

Design 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 ASIC 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: – Fracture of a bonding wire to the measuring cell. – Fracture anywhere on any of the signal lines. – Fracture of the bridge supply and ground.

3

2

1

0.5 0

0

35

70

0

50

100

0

250

500

750

0

300

600

900

105 150

200

140 250

1000 1250 1500

1200 1500 1800 bar Pressure p

46

A

Pressure sensors

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

Diagnostic function during self-test (following switch-on). Only for 0 265 005 303. – Correctness of the calibration values – Function of the sensor signal path from the sensor to the A/D converter of the evaluation unit – Check of the supply lines. Diagram: Characteristic of the output voltage following switch-on – Function of the signal and alarm paths – Detection of offset errors – Detection of short circuits in wiring harness – Detection of overvoltage and undervoltage – If an error is detected during the sensor’s self-test, the signal output is switched to the voltage range > 96%UV.

Self-monitoring. Offset and sensitivity. Only for 0 265 005 303. UA UV 96 %

Error band Limitation, working signal

90 % Measuring range

100 %

Error range Offset error Sensitivity error 12 % 4%

Error range Error band Pressure p

Measuring circuit. Pressure sensor

Diagnostic function during normal operation. Only for 0 265 005 303. – Detection of offset errors – Detection of sensitivity errors (with pressure applied) – Wiring-harness function, detection of wiring-harness short circuits – Detection of overvoltage and undervoltage – If an error is detected during the sensor’s self-test, the signal output is switched to the voltage range >96%UV.

ECU 3

+ 5 V (UV)

Pull up resistor Signal (UA) 2 A/Dconverter and C 1

GND

Range Pressure range bar (MPa) 140 (14) 250 (25) 1500 (150)

Sensor Type KV2 BDE – RDS2 RDS3

1800 (180)

RDS2 RDS3

Thread

Connector

Pin

M 10x1 M 10x1 M 12x1.5 M 12x1.5 M 12x1.5 M 12x1.5 M 12x1.5 M 18x1.5 M 18x1.5 M 18x1.5

Compact 1.1 PSA Working circuit Compact 1.1 Working circuit Compact 1.1 Compact 1.1 Compact 1.1 Compact 1.1 Working circuit

Gold-plated – Silber-plated Gold-plated Silber-plated Gold-plated Gold-plated Gold-plated Gold-plated Silber-plated

Dimens. drawing 1 2 3 4 5 6 4 7 8 9

Page

Part number

47 48 48 48 48 49 48 49 49 49

0 261 545 006 0 265 005 303 0 281 002 238 0 281 002 405 0 281 002 498 0 281 002 522 0 281 002 398 0 281 002 472 0 281 002 534 0 281 002 504

Accessories For 0 265 005 303 Plug housing – Quantity required: 1 AMP No. Contact pins for 0.75 mm2 Quantity required:3 AMP No. Gaskets for 1.4...1.9 mm2 Quantity required: 3 AMP No. 1) To be obtained from AMP Deutschland GmbH, Amperestr. 7–11, D-63225 Langen, Tel. 0 61 03/7 09-0, Fax 0 61 03/7 09 12 23, E-Mail: [email protected]

2-967 642-1 1) 2-965 907-1 1) 2-967 067-1 1)

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Pressure sensors

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Technical data Pressure sensor Pressure-sensor type Application/Medium Pressure range

bar (MPa) UV

Offset accuracy Sensitivity accuracy at 5 V In range 0...35 bar

FS 2) of measured value

In range 35...140 bar In range 35...250 bar In range 35...1500 bar

In range 35...1800 bar Input voltage, max. Us V Power-supply voltage UV V Power-supply current IV mA Output current IA µA...mA Load capacity to ground nF Temperature range °C Overpressure max. pmax bar Burst pressure pburst bar Tightening torque Ma Nm Response time T10/90 ms Note: All data are typical values 1) RME = Rapeseed methyl ester 2) FS = Full Scale 3) Of measured value 4) Output current with pull-up resistor 5) +140 °C for max. 250 h

0 261 545 006 0 265 005 303 0 281 002 238 0 281 002 405 KV2 BDE – RDS2 Unlead. fuel Brake fluid Diesel fuel or RME 1) 140 250 1500 (14) (25) (150) 0.7 % FS 2.0 % 1.0 % FS 1.5 % FS

0 281 002 498 0 281 002 522 RDS3 Diesel fuel or RME 1) 1500 (150) 0.7 % FS

0 281 002 398 0 281 002 472 RDS2 Diesel fuel or RME 1) 1800 (180) 1.0 % FS

0 281 002 534 0 281 002 504 RDS3 Diesel fuel or RME 1) 1800 (180) 0.7 % FS

–

≤ 0.7 %

0.7 % FS

1.0 % FS

0.7 % FS

1.5 % – –

– ≤ 5.0 % 3) –

– – 1.5 % FS

– – –

– – –

– 16 5 ±0.25 9...15 – 13 –40...+130 180 > 300 22 ±2 2

– – 5 ±0.25 ≤ 20 –100...3 – –40...+120 350 > 500 20 ±2 –

– 16 5 ±0.25 9...15 – 13 –40...+130 2200 4000 35 ±5 2

2.3 % FS 16 5 ±0.25 9...15 2.5 mA 4) 10 –40...+120 5) 2100 3500 70 ±2 5

1.5 % FS 16 5 ±0.25 9...15 – 13 –40...+130 2200 4000 70 ±2 2

1.0 % FS 1.5 % FS – – 2.0 % FS 2.5 % FS – 16 5 ±0.25 9...15 2.5 mA 4) 10 –40...+120 5) 1800 3000 35 ±5 5

Dimension drawings Space required by plug, approx. 25 mm Space required when plugging/unplugging, approx. 50 mm SW = A/F size

Connector-pin assignment Pin 1 Ground Pin 2 Output voltage UA Pin 3 Supply voltage UV 59,8

1

24,4

3,8 Pin 2 S 2

90°

3

30

M 10x1-6g

13

ø 25

27

SW

2 1

21,5

ø 8,5 ± 0,3 ø 2,8 ± 0,1

0 261 545 006 140 bar

5,3 ± 2

1

6 16,5 ± 3

F

Pin 1

3

Pin 3

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Pressure sensors

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

D F S

Dimension drawings Space required by plug, approx. 25 mm Space required when plugging/unplugging, approx. 50 mm SW = A/F size

41 B 24,3 A

2 10 ± 0,1

53,3 38 ± 0,6 20,9 ± 0,5 17,1± 0,2 3 2,8 - 0,5

Pin 2

ø8,5 - 0,1 ø2,8 ± 0,1

90°

M10x1

ø25 - 0,1

SW 24

0 281 002 238 1500 bar

Connector-pin assignment Pin 1 Ground Pin 2 Output voltage UA Pin 3 Supply voltage UV

ø22,1

0 265 005 303 250 bar

Gasket Date of manufacture 3-pin plug

1

2

3

5,3 ± 0,2 Pin 1

15,3 ± 0,1

Pin 3

29 ± 2

3

7 R

Pin 2

S

ø 25

27

SW

1,5

2

30

0 281 002 405 1500 bar 0 281 002 398 1800 bar

2

D

3

1

M 12 x1,5

1

3

0,6 - 0,1 12,5

Pin 1

F

Pin 3

16 69 ± 2

4 29 ± 2 7 R

Pin 2

S

2

2 1

24,4

0 281 002 498 1500 bar

D

3

1

M 12x1,5

13

ø 25

27

SW

1,5

30

3

0,6 - 0,1 12,5

Pin 1

F

Pin 3

16 68 ± 2

5 21,5 ± 2 6 ± 0,5

± 0,1

27

SW

2 1

2

D

3

30

1

M 12 x1,5

ø 24,8

Pin 2

S

3

2,15 ± 0,15 12,5

F

16,6 ± 0,7 60,5 ± 2

Pin 1

Pin 3

A

B

Pressure sensors

Dimension drawings Space required by plug, approx. 25 mm Space required when plugging/unplugging, approx. 50 mm SW = A/F size

0 281 002 522 1500 bar

D F S

Gasket Date of manufacture 3-pin plug

Connector-pin assignment Pin 1 Ground Pin 2 Output voltage UA Pin 3 Supply voltage UV

6 21,5 ± 2 6

24,4

0 281 002 472 1800 bar

D

3

1

30

3

0,6 - 0,1

M 12 x1,5- 6g

1

Pin 2

S

1

2

2

13

ø 25

27 SW

R

12,5 ± 2

Pin 1

F

Pin 3

16 59,3 ± 2

7

29 ± 2 3,8 - 2 7 3

Pin 2

ø12,6

ø15,5

3

M 18x1,5-6g

60°

13

ø 25

27

SW

2 1

S 2 1

Pin 1

F 24,4

30

3

Pin 3

17,1 69 ± 2

0 281 002 534 1800 bar

8 21,5 ± 2

17,1 15 °

Pin 2

ø12,6

ø15,5

3

M 18x1,5-6g

60°

13

ø 25

27

SW

2 1

S 2 1

2,5 24,4

Pin 3

F

6

3

Pin 1

30 60,4 ± 2

0 281 002 504 1800 bar

9

21,5 ± 2

17,1 15 °

Pin 2

ø12,6

ø15,5

3

M 18x1,5-6g

60°

ø 25

27

SW

2 1

S 2 1

2,5

30

F

6 60,8 ± 2

Pin 1

3

Pin 3

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