Wideband LAMBDA controller with Stepping driver control - LCP90

Technical Specification

The product LAMBDA controller works with a wideband Lambda sensor type LSU 4.9 and LSU 4.2 with extended function for PID mixture regulation using a Stepping motor control.

Lambda Controller can be used for:
-  Combustion engines of automobile
-  Cogeneration units = CHP
-  Boilers for gas combustion or biomass

LAMBDA controller is based on circuit BOSCH CJ125 which serves basic function of oxygen sensor along with supporting microprocessor for filtering and control. Microprocessor also provides PID lambda regulation by Stepping motor control, Analog output – AO, diagnostic interface USB and CANbus in protocol SAE J1939.

Lambda heater is controlled by PID regulator and the resistance of measuring cell (Nerns Cell) with auto-off option according to engine speed received from CANbus / J1939.

LAMBDA controller processes and visualizes data about Lambda mixture – λ, Oxygen – O2, Ratio – A/F, Sensor temperature – T [°C], Supply voltage – U[V], Analog output – AO [V] Actual step of stepper motor [-] and Engine speed – RPM (takes from CANbus / J1939).

Main Features

• Supply voltage range 9 to 36V (12V/24V)
• Consumption 15W (Lambda heater and Stepping motor)
• Operation temperature −40 to 85°C
• Support for Lambda sensor type: LSU 4.9 and LSU 4.2
• Used BOSCH CJ125 circuit and microprocessor support
• Visualization:
  • Lambda – λ ........................ 0.7 to 12.5 (± 0.1%)
  • Oxygen – O2 .................... -7.5 to 20% (± 0.1%)
  • Ratio – A/F ........................ Gasoline, Diesel, Methanol, Ethanol
  • E85, LPG, CNG, Hydrogen
  • Temperature – T [°C] ........ -40 to 1050°C (± 3°C)
  • Supply voltage – U [V] ....... 7 to 50V (± 2 %)
  • Analog output – AO [V] ...... 0 to 5V (± 0.5%)
  • Digital Input DI1/DI2 ........... 0 or 12/24V
  • Engine hours ...................... [h:m:s]
  • Actual step .......................... 0 to 65000 steps
• PID mixture regulation by Stepping motor control (microstep 1/32)
• Power source 11V inside for LAMBDA heating and Stepping motor supply
• CANbus support at protocol SAE J1939 (250kbps)
• Supported connection or integration with ECU MASTER
• Galvanically isolated USB – USB protection against earth fault and EMC disturbances
• PC application – configuration and visualization measured values
• Measuring the supply voltage
• Installation standard – DIN rail 35mm
• Protection class – IP20
• Dimensions 118×101×23mm

Signal Description

^* Index of pins depends on Lambda sensor type; index in bracket belong to type LSU 4.2

Wiring Schema

Application LAMBDA control – visualization software

Visualization is done from application LAMBDA control run on your PC. The application works under Windows 95 and higher. Installation requires 4MB of free space at your hard disc.

To connect lambda to PC is used USB interface. Driver for USB is included on the installation CD.

Visualized information

• Revolutions [rev/min]
• Lambda – λ
• Oxygen – O2
• Ratio – A/F
• Temperature – T [°C]
• Supply voltage – U [V]
• Analog output – AO [V]
• Engine hours [h:m:s]
• Actual stepping motor possition [-]

 Run the visualization

AFR – Air Fuel Ratio

Documentation

Application Software

Available Variants

Recommended Accessories

• Connector K06S for LSU 4.9

  Connector K06S for LAMBDA probe LSU 4.9 with terminals.

  
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• Lambda probe LSU 4.9

  Oxygen sensor LSU 4.9

  
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• Extension cable for probe Bosch LSU 4.9

  Extension cable for Lambda probe Bosch 0 258 017 025

  
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