Lambdatronic LT4 ADV

The Lambdatronic LT4 ADV is a control module designed to supply and control up to four Bosch LSU ADV. The lambda sensor LSU ADV offers extended features as an improved robustness, a shorter heating time and less influence from the ambient pressure.

The LSU ADV contains a Nernst cell and a pump cell. The lambda value between the Nernst cell and an internal oxygen reference chamber is controlled to lambda 1.013, independent of the oxygen concentration on the emission side. This happens thanks to the pump current throw the pump cell, responsible for the transmission of oxygen atoms in the sensor ceramic. The current proportional output voltage of the IC gets translated in a lambda value. The LT4 ADV provides the sensors temperature and other diagnostics parameters over CAN. The 4 lambda signals can be read by using the CAN or analog output.

The main feature and benefit of this unit is its compact design, its light weight construction, as well as the possibility to control up to 4 Lambda Sensors LSU ADV with multiple user-configurable parameters.

Features

  • Supply of up to 4 Bosch lambda sensors, type LSU ADV
  • Integrated voltage compensation for sensor heater

Functions

Application

Lambda 0.75 to 5

Compatible Bosch sensor type

LSU ADV

Channels

4

Heater

Internal

Technical Specifications

Mechanical Data

Weight with wire

98 g

Sealing

100 % humidity

Mounting

Velcro

Size w/o wire (w*l*h)

54 x 59 x 13 mm

Operating temp. range (housing)

-20 to 85°C

Storage temp. range

-20 to 85°C

Max. vibration

Vibration Profile 1 (see Appendix or www.bosch-motorsport.com)

Electrical Data

Power supply US

(6.5) 10 to 14 V

Max power supply (1 min) US

Max. 26 V

Thermal dissipation loss

3 W at 14 V

Current Is

5 A

Current Is (Heating up)

26 A

Software

Configuration with Modas Sport

Included

Characteristic

Signal output 1

CAN

Signal output 2

4 x 0 to 5 V “analog”

CAN- baud rate

500 kbaud or 1 Mbaud

Signal resolution

2,5 * 10-4 lambda

Signal sampling rate

100 Hz

CAN refresh rate

100 Hz

Connectors and Wires

Connector

AS 6-14-35PN

Connector loom

AS 1-14-35SN

F 02U 000 365-01

Sleeve

Viton

Wire size

26

Wire length L

20 cm

Pin Assignment

Pin

Function

1

+ 12 V (Battery +)

2

+ 12 V (Battery +)

3

Ground (Battery -)

4

Ground (Battery -)

5

K-Line diagnostic connection

6

CAN1 + (high)

7

CAN1 - (low)

8

Analog out 1

9

Analog out 2

10

Analog out 3

11

Analog out 4

12

Reference GND for analog out

13

Shield

14

Pump current LSU 1 IP1

15

Virtual GND LSU 1 VM1

16

Heater PWM LSU 1 Uh-1

17

Heater (Batt +) LSU 1 Uh+1

18

Not connected

19

Nernst voltage LSU 1 UN1

20

Pump current LSU 2 IP2

21

Virtual GND LSU 2 VM2

22

Heater PWM LSU 2 Uh-2

23

Heater (Batt. +) LSU 2 Uh+2

24

Not connected

25

Nernst voltage LSU 2 UN2

26

Pump current LSU 3 IP3

27

Virtual GND LSU 3 VM3

28

Heater PWM LSU 3 Uh-3

29

Heater (Batt +) LSU 3 Uh+3

30

Not connected

31

Nernst voltage LSU 3 UN3

32

Pump current LSU 4 IP4

33

Virtual GND LSU 4 VM4

34

Heater PWM LSU 4 Uh-4

35

Heater (Batt. +) LSU 4 Uh+4

36

Not connected

37

Nernst voltage LSU 4 UN4

Installation Notes

Typical lifetime: max. 220 h / 2 years

For application with severe conditions and/or high volume, please contact your Bosch Motorsport counterpart in order to define the most appropriate validation program

The LT4 ADV is designed to supply 4 Bosch lambda sensors, type LSU ADV

The LT4 ADV is featured with voltage compensation for the heating profile.

The unit can be connected to any CAN system (500 kbaud or 1 Mbaud) and analog measuring device.

To avoid signal errors, a cable length of maximum 1.5 m between sensor and box is recommended.

The unit is secure from miss-pinning.

The reference ground (GND_REF) has to be connected either to the measuring device or to the system ground.

A ground offset of 2 V (max.) between GND and GND_REF has not to be exceeded.

See the LT4 ADV function sheet for software documentation (e.g. CAN protocol).

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

Ordering Information

Lambdatronic LT4 ADV

Order number: F 02U V01 111-04

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