Wideband LAMBDA controller with Stepper 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 Stepper 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 Stepper 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/mA] 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 out – AO [V] ............  0-5V, 0-10V, 0-20mA, 4-20mA (± 0.1%)
  • Digital Input DI1/DI2 ........... 0 or 12/24V
  • Engine hours ....................... [h:m:s]
  • Actual step ........................... 0 to 65000 steps
• PID mixture regulation by Stepper motor control (micro-step 1/32)
• Power source 11V inside for LAMBDA heating and Stepper 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
• Spring terminals (screw terminals upon request)
  

Adding choice of USB flash disk with all documentation and PC application:
If you buy a flash drive at the very bottom in Recommended accessories (here), we will upload all the necessary documentation and software to it.
Otherwise, these files are also freely downloadable below.

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. We supply the module also with the USB connection cable. The driver for USB you can download in the Documentation section.

Visualized information

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

 Run the visualization

AFR – Air Fuel Ratio

Adding choice of USB flash disk with all documentation and PC application:
If you buy a flash drive at the very bottom in Recommended accessories (here), we will upload all the necessary documentation and software to it.
Otherwise, these files are also freely downloadable below.

Documentation

Application Software

Available Variants

Recommended Accessories

• Connector K06S for LSU 4.9

  Connector K06S for LAMBDA probe LSU 4.9 with terminals.

  
    Detail

• Lambda probe LSU 4.9

  Wideband lambda sensor LSU 4.9

  
    Detail

• Extension cable for oxygen sensor Bosch LSU 4.9

  LAMBDA probe extension cable for connecting module LCP80 and LCP90

  
    Detail

• USB flash disk

  USB flash disk - uploaded with SW and documentation

  
    Detail