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Emulator lambda probe and MAF SK-04

Эмулятор лямбда зонда и MAF SK-04

The emulator of the lambda probe and MAF SK-04 is designed to recreate (emulate) the signals of the lambda probes and any analog signal in the range of 0 ... 5V. It is possible to correct the mixture on individual operating modes of the motor using a computer.

The reconstruction of the signal zirconia lambda probe is carried out by analyzing the signals from the mass air flow sensor (MAF) and the fuel injector with their subsequent comparison with the table. The base table is recorded by the manufacturer or in the process of self-learning emulator (Fig. 2). Using the capabilities of the emulator can be a correction of the fuel mixture. By agreement, emulators for a titanium lambda probe with a 0 ... 5 Volt signal can be supplied.

It is possible to switch emulation tables for a lambda probe using an external switch. This is necessary, for example, when switching to power or economy mode, propane or gasoline (for HBO).

The reconstruction of the analog signal is made in accordance with the 3-dimensional map. The table (map) contains the voltage values ​​at the emulator output, which are tied to the rotational speed, injection time or air flow. This feature can be used to emulate a MAF signal from a sensor, even if it is not present. This approach allows you to get rid of this sensor. The re-creation of the MAF signal can be done by converting the signal from the MAP, which is set if necessary (the price of the MAP sensor from the Daewoo Lanos car is about $ 25).

The SK-04 emulator is equipped with software that allows you to connect it to a computer, read and write all parameters in real time, read fuel consumption, tune without stopping the engine. Provides data output to the graphs. It is possible to save and record signal emulation tables (Fig. 1). Due to the fact that there is a correction table, you can adjust the fuel mixture separately for different modes of operation of the engine.

The device can work with DFID (MAF), having both analog output and pulse.

Запись параметров инжектора времени

Figure 1. Record time injector parameters.
The lambda emulator program and MAF can display (as a graph) on the monitor screen and save the following parameters to the file:
Rotational speed, injection time, voltage from MAF (MAP readings are converted into relative amount of air), voltage from lambda, fuel consumption is instantaneous and total.

Кривая эмулятора лямбда зонда (датчика кислорода)

Figure 2. Emulator curve for oxygen sensor (oxygen sensor).
This chart with the table determines the ratio of fuel and air to emulate a lambda signal. If an absolute pressure sensor (MAP) is used, the voltage from it is converted into relative air flow.

If a mass air flow sensor (DFID, MAF) is used, then the current amount of fuel is compared to the voltage from DFID.

Эмуляция аналогового сигнала MAF по 3-х мерной таблице

Figure 3. Emulation of the analog MAF signal on a 3-dimensional table.
The output signal is formed on the basis of:
1. The frequency of rotation of the crankshaft;
2. You can choose one of the preferences:
a) Input voltage;
b) Estimated air flow (calculated on the basis of the rotational speed and the readings of the external MAP sensor);
d) Fuel injection time

Эмуляция аналогового сигнала MAF по 2-х мерной таблице.

Figure 4. Emulation of the analog MAF signal on a 2-dimensional table.
The output signal is generated based on the estimated air flow or voltage at the input of the emulator. You can also specify that the signal is formed on the basis of fuel consumption.

What gives the emulator?

- Allows you to get rid of zirconium or titanium lambda probe

- It makes it possible to replace the standard air flow sensor (MAF sensor) with a cheap absolute pressure sensor (MAP - $ 25)

- Ability to obtain fuel economy or increase power with the appropriate setting of the fuel mixture

- Receive the table of any signal with a level from 0 to 5V, which can be used for almost any purpose.