Lambda Sensor Mini-LSU 4.9

Application

lambda 0.65 to ∞

Fuel compatibility

gasoline/Diesel/E85

Exhaust gas pressure

≤ 2.5 bar (higher with decrease accuracy)

Exhaust gas temperature range (operating)

< 930°C

Exhaust gas temperature range (max.) for short time

< 1,030°C

Hexagon temperature

≤ 700°C

Wire and protective sleeve temperature

< 250°C

Connector temperature

< 150°C

Storage temperature range

-40 to 100°C

Max. vibration (stochastic peak level)

300 m/s² (see Installation Notes)

Mini-LSU 4.9 with automotive connector

Connector

1928.404.682
(Series production type, not available from Bosch Motorsport)

Mating connector

D261.205.356-01

Wire length L

950 mm

Mini-LSU 4.9 with motorsport connector

Connector

AS607-35PN

Mating connector

AS007-35SN

Wire length L

200 to 1,400 mm

Weight w/o wire

34 g

Thread

M16x1.5

Wrench size

17 mm

Tightening torque

60 Nm

Power supply H+ nominal

7.5 V

System supply voltage H+ (min)

10.8 V

Heater power steady state

7.5 W

Heater control frequency

100 Hz

Nominal resistance of Nernst cell

300 Ohm

Max. current load for Nernst cell

250 µA

Signal output

I_P meas

Accuracy at lambda 0.8

0.80 ± 0.01

Accuracy at lambda 1

1.016 ± 0.007

Accuracy at lambda 1.7

1.70 ± 0.05

I _P [mA]

lambda

U _A [V], v=17

U _A [V], v=8

-2.000

0.650

-

0.510

-1.602

0.700

-

0.707

-1.243

0.750

0.192

0.884

-0.927

0.800

0.525

1.041

-0.800

0.822

0.658

1.104

-0.652

0.850

0.814

1.177

-0.405

0.900

1.074

1.299

-0.183

0.950

1.307

1.409

-0.106

0.970

1.388

1.448

-0.040

0.990

1.458

1.480

0

1.003

1.500

1.500

0.015

1.010

1.515

1.507

0.097

1.050

1.602

1.548

0.193

1.100

1.703

1.596

0.250

1.132

1.763

1.624

0.329

1.179

1.846

1.663

0.671

1.429

2.206

1.832

0.938

1.701

2.487

1.964

1.150

1.990

2.710

2.069

1.385

2.434

2.958

2.186

1.700

3.413

3.289

2.342

2.000

5.391

3.605

2.490

2.150

7.506

3.762

2.565

2.250

10.119

3.868

2.614

Please note: U_A is not an output signal of the lambda sensor, but the output of the evaluation circuit. Only I_P correlates with the oxygen content of the exhaust gas. Amplification factor v=17 is typically used for lean applications (lambda>1), amplification factor v=8 is typically used for rich applications (lambda<1).

R (Ohm)

Temp (°C)

80

1030

150

888

200

840

250

806

300 [operating point]

780

350

761

400

744

450

729

550

703

650

686

800

665

1000

642

1200

628

2500

567

Connector

Please see variations

Mating connector

Please see variations

Sleeve

fiber glass / silicone coated

Pin 1

Pump current APE / IP

Pin 2

Virtual ground IPN / VM

Pin 3

Heater voltage H- / Uh-

Pin 4

Heater voltage H+ / Uh+

Pin 5

Trim resistor RT / IA

Pin 6

Nernst voltage UN / RE

Wire length

Please see variations

Various motorsport and automotive connectors are available on request.

This lambda sensor operates only in combination with a special LSU-IC, used in most Bosch Motorsport ECUs and lambda control units like LT4. You’ll find this unit and more on our homepage at Accessories/Expansion Modules.

The lambda sensor should be installed at point which permits the measurement of a representative exhaust-gas mixture and which does not exceed the maximum permissible temperature.

Install at a point where the gas is as hot as possible.

Observe the maximum permissible temperature.

Sensors should be installed as close to vertical as possible (wire upwards).

The sensor is not to be fitted near to the exhaust pipe outlet, so that the influence of the outside air can be ruled out.

The exhaust system up stand and surrounding the sensor must be sealed in order to avoid the effects of leakage air.

Protect the sensor against condensation water. The sensor is not to be painted, nor is wax to be applied or any other forms of treatment. Use only the recommended grease for lubricating the thread.

Please find further application hints in the offer drawing at our homepage.

A higher maximum vibration profile is possible and should be determined by the customer’s individual application.