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Lambda Sensor Mini-LSU 4.9

Lambda Sensor Mini-LSU 4.9

This sensor is designed to measure the proportion of oxygen in exhaust gases of automotive engines (gasoline or Diesel).

The wide band lambda sensor Mini-LSU 4.9 is a planar ZrO2dual cell limiting current sensor with integrated heater. Its monotonic output signal in the range of lambda = 0.65 to air makes the LSU capable of being used as a universal sensor for lambda = 1 measurement as well as for lean and rich ranges.

The connector housing contains a trimming resistor, which defines the characteristic of the sensor. The main benefit of the Mini-LSU 4.9 is its very compact design in combination with the high Bosch production quality standard. The Mini-LSU is produced and tested in a handmade process.

The complete light weight housing is made of Inconel which makes it resistant against high temperatures. The sensor element is more than 50 % smaller than it is in the production lambda sensor. It is connected over silver coated steel cables to make it more reliable against vibrations.

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 Electronics/Sensor Interfaces.

Product Highlights

Features

  • Application: lambda 0.65 to ∞
  • Exhaust gas temperature: 930°C (1,030 for a short time)
  • Hexagon temperature: 700°C
  • Thread: M16x1.5
  • Weight w/o wire: 34 g

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Literature

Product Details

Application
lambda 0.65 to ∞
Application
Fuel compatibility
lambda 0.65 to ∞
gasoline/Diesel/E85
Application
Exhaust gas pressure
lambda 0.65 to ∞
≤ 2.5 bar (higher with decrease accuracy)
Application
Exhaust gas temperature range (operating)
lambda 0.65 to ∞
< 930°C
Application
Exhaust gas temperature range (max.) for short time
lambda 0.65 to ∞
< 1,030°C
Application
Hexagon temperature
lambda 0.65 to ∞
≤ 700°C
Application
Wire and protective sleeve temperature
lambda 0.65 to ∞
< 250°C
Application
Connector temperature
lambda 0.65 to ∞
< 150°C
Application
Storage temperature range
lambda 0.65 to ∞
-40 to 100°C
Application
Max. vibration (stochastic peak level)
lambda 0.65 to ∞
300 m/s2(see Installation Notes)
Variations
Variations
Mini-LSU 4.9 with automotive connector
Variations
Connector
1928.404.682
(Series production type, not available from Bosch Motorsport)
Variations
Mating connector
D261.205.356-01
Variations
Wire length L
950 mm
Variations
Mini-LSU 4.9 with motorsport connector
Variations
Connector
AS607-35PN
Variations
Mating connector
AS007-35SN
Variations
Wire length L
200 to 1,400 mm
Mechanical Data
Mechanical Data
Weight w/o wire
34 g
Mechanical Data
Thread
M16x1.5
Mechanical Data
Wrench size
17 mm
Mechanical Data
Tightening torque
60 Nm
Electrical Data
Electrical Data
Power supply H+ nominal
7.5 V
Electrical Data
System supply voltage H+ (min)
10.8 V
Electrical Data
Heater power steady state
7.5 W
Electrical Data
Heater control frequency
100 Hz
Electrical Data
Nominal resistance of Nernst cell
300 Ohm
Electrical Data
Max. current load for Nernst cell
250 µA
Characteristic
Characteristic
Signal output
IPmeas
Characteristic
Accuracy at lambda 0.8
0.80 ± 0.01
Characteristic
Accuracy at lambda 1
1.016 ± 0.007
Characteristic
Accuracy at lambda 1.7
1.70 ± 0.05
Characteristic
I P[mA]
lambda
U A[V], v=17
U A[V], v=8
Characteristic
-2.000
0.650
-
0.510
Characteristic
-1.602
0.700
-
0.707
Characteristic
-1.243
0.750
0.192
0.884
Characteristic
-0.927
0.800
0.525
1.041
Characteristic
-0.800
0.822
0.658
1.104
Characteristic
-0.652
0.850
0.814
1.177
Characteristic
-0.405
0.900
1.074
1.299
Characteristic
-0.183
0.950
1.307
1.409
Characteristic
-0.106
0.970
1.388
1.448
Characteristic
-0.040
0.990
1.458
1.480
Characteristic
0
1.003
1.500
1.500
Characteristic
0.015
1.010
1.515
1.507
Characteristic
0.097
1.050
1.602
1.548
Characteristic
0.193
1.100
1.703
1.596
Characteristic
0.250
1.132
1.763
1.624
Characteristic
0.329
1.179
1.846
1.663
Characteristic
0.671
1.429
2.206
1.832
Characteristic
0.938
1.701
2.487
1.964
Characteristic
1.150
1.990
2.710
2.069
Characteristic
1.385
2.434
2.958
2.186
Characteristic
1.700
3.413
3.289
2.342
Characteristic
2.000
5.391
3.605
2.490
Characteristic
2.150
7.506
3.762
2.565
Characteristic
2.250
10.119
3.868
2.614
Characteristic
Please note: UAis not an output signal of the lambda sensor, but the output of the evaluation circuit. Only IPcorrelates 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).

Heater Strategy

.
Resistance/LSU Temperature
Resistance/LSU Temperature
R (Ohm)
Temp (°C)
Resistance/LSU Temperature
80
1030
Resistance/LSU Temperature
150
888
Resistance/LSU Temperature
200
840
Resistance/LSU Temperature
250
806
Resistance/LSU Temperature
300 [operating point]
780
Resistance/LSU Temperature
350
761
Resistance/LSU Temperature
400
744
Resistance/LSU Temperature
450
729
Resistance/LSU Temperature
550
703
Resistance/LSU Temperature
650
686
Resistance/LSU Temperature
800
665
Resistance/LSU Temperature
1000
642
Resistance/LSU Temperature
1200
628
Resistance/LSU Temperature
2500
567
Connectors and Wires
Connectors and Wires
Connector
Please see variations
Connectors and Wires
Mating connector
Please see variations
Connectors and Wires
Sleeve
fiber glass / silicone coated
Connectors and Wires
Pin 1
Pump current APE / IP
Connectors and Wires
Pin 2
Virtual ground IPN / VM
Connectors and Wires
Pin 3
Heater voltage H- / Uh-
Connectors and Wires
Pin 4
Heater voltage H+ / Uh+
Connectors and Wires
Pin 5
Trim resistor RT / IA
Connectors and Wires
Pin 6
Nernst voltage UN / RE
Connectors and Wires
Wire length
Please see variations
Connectors and Wires
Various motorsport and automotive connectors are available on request.
.
.

Further Information

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.
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.
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.
Install at a point where the gas is as hot as possible.
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.
Observe the maximum permissible temperature.
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.
Sensors should be installed as close to vertical as possible (wire upwards).
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 sensor is not to be fitted near to the exhaust pipe outlet, so that the influence of the outside air can be ruled out.
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 exhaust system up stand and surrounding the sensor must be sealed in order to avoid the effects of leakage air.
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.
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.
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.
Please find further application hints in the offer drawing at our homepage.
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.
A higher maximum vibration profile is possible and should be determined by the customer’s individual application.
Safety Note
Safety Note
The sensor is not intended to be used for safety related applications without appropriate measures for signal validation in the application system.

Lambda Sensor Mini-LSU 4.9
With automotive connector
Order number: B258.490.103-30

Lambda Sensor Mini-LSU 4.9
With motorsport connector
Order number: F02U.V02.227-02

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