ยินดีต้อนรับระบบหัวฉีดเทคโนโลยี่ใหม่ล่าสุดของ E-Gas
Welcome to the next Generation : SLY Injection EOBD ของ E-G@s

Welcome to the next generation: SLY Injection EOBD
EOBD stands for “European On Board Diagnosis” and is a diagnostic system introduced in Europe in 2001 by the European Directive 98/69 EC stage A and stage B for motor vehicles in compliance with Euro III, Euro IV and any following standards.
Diagnosis is performed by the engine electronic control unit itself, referred to as the ECU (Electronic Control Unit), it constantly keeps under control any component and system which may affect emissions. Since direct measurement of the exhaust emission level is technically impossible while the engine is running, EOBD is based on indirect evaluations.

EOBD needs to develop specific algorithms for each vehicle model and to take into account the complex interactions among the different subsystems under the different operating conditions, in order to allow sufficient reliability and sensitivity.

The petrol ECU can vary, within the limits determined by the manufacturer, the opening and closing times of the injectors in order to keep the vehicle emissions and drivability within the limit values. The manufacturer determines the range of variation, which is named system self-adaptivity or self-adaptive parameters.

If the ECU self-adaptive parameters exceed the limit values, the EOBD illuminates a malfunction indicator light on the vehicle’s dashboard to alert the user of the malfunction (this amber yellow indicator light is also named “check engine lamp”).
In the majority of timed sequential systems, running on LPG or methane is only based on reading the petrol ECU injection time and exploits the ECU variations in order to stay within the correction range provided by the self-adaptive parameters. Since LPG is a mixture of gases (propane and butane) with different heating powers and present in different quantities, the carburation variation determined by gas variability may not allow the petrol ECU to stay within the self-adaptive parameters, thus illuminating the check-engine lamp and also causing malfunctions while the vehicle is running on petrol.

This problem is not due to the gas system (unless the wrong parameters have been used to calibrate it); it is instead only caused by mixtures’ diversity or by other variables due to the wearing of some components through time.

e-GAS was the first in the world to introduce a monitoring system which is based on the interpretation of the signals provided by the EOBD system. Real-time monitoring of this data allows us to interpret the deviation of the petrol ECU’s self-adaptive parameters from the optimal operating conditions. Based on this data, the Sly injection control unit varies the correction coefficients thus modifying and optimising the gas carburetion, and keeping self-adaptive parameters within the range provided by the petrol ECU.

In practise, while the engine is running on gas, the Sly injection system makes all the corrections, which were earlier only made by the petrol ECU.

We can therefore state, supported by the excellent results we are obtaining, that the EOBD Sly injection system, at the moment, is the only real self-adaptive and self-learning system.

It is also very important to clarify that this is not an EOBD emulator, but a system which really interacts with the petrol ECU by varying carburation properly and in real-time, while the vehicle is running on GAS, exactly the same as provided by the petrol ECU’s software.