ECU FOR EFI
78cc Engine |
Simulation of Sensors on Proteus |
ECU for 78cc Engine |
Nowadays almost every motorcycle engine uses traditional carburetors and capacitor discharge ignition (CDI) system in Pakistan. However this traditional technique of engine control system doesn’t provide flexible means to adjust engine’s major parameters like fuel metering and ignition angles due to which we can not bring improvements in this system regarding fuel consumption, optimized power/torque, acceleration, and the most important is to control the emission of harmful gases according to the European laws.
Today, in foreign countries a competitive environment exists for the electronic fuel injection (EFI) system, which is a fuel metering system that can replace the carburetor in automobiles and motorbikes. Everyone knowledgeable in fuel injection agrees that this system meters fuel with remarkable flexibility and with a control accuracy unattainable by a carburetor. That is why initially we are working to introduce an EFI (electronic fuel injection) system for a NON-EFI GY6 type engine, in which an ECU (Electronic Control Unit) is designed to perform a task of engine management. Here we replaced a stock carburetor with Air-Intake manifold by a specially designed Throttle Body with the new air-intake manifold and air filter in which TPS, MAP/MAT and Fuel Injector have already been fitted at the appropriate positions. The signals generated by the various sensors fitted at the different locations of the engine are acquired and processed by ECU to determine when to actuate the fuel injector for how much time (to spray a specified amount of fuel into the air just before the inlet valve of the cylinder under a high pressure, maintained with the help of fuel pump and pressure regulator to optimize the fuel mixing) and when to ignite this compressed air/fuel mixture in the cylinder so that it may run under the optimize conditions and help to maintain an ideal Air/Fuel mixture ratio i.e. 14.7:1 at which an engine provides a best power, less emissions of harmful gases as well as is proved to be a fuel economic [2]. This system also provides a GUI based software from which it is get connected to the computer via SERIAL/USB port for tuning an engine according to our desires (like some of users need maximum power without caring about fuel consumption). This software provides user a dual mode operation in which under one mode a user can configure a fuel map himself by running a dynamometer test or download a fuel map directly to the ECU provided by us however under second mode or AUTO-TUNE mode a system configure it or generates its fuel map itself to run the engine at ideal Air/Fuel mixture of 14.7:1.We’ll implement this software using a LabVIEW which will also enable us to monitor the real time engine sensors’ data by displaying it using different gauges so that we can accurately tune-up an engine by keeping our engine out of danger by continuously monitoring the data of engine temperature sensor, oxygen sensor, crank shaft rpm etc. |
ECU from Hafiz Muhammad Nabeel on Vimeo. |