I had a plan to run the GDI injector for a single pulse injection. This injector draws high current and voltage for its operation. For that I used a GDI injector, Arduino Atmega 2560, Motor Shield, and 12V Battery source. The motor shield was fixed with Arduino pin-wise for easy operation and control. The jumper wire was kept on during this process as the power supply is only by battery for both Arduino and motor shield. The connections are follows (can be seen from figure):
The code was processed to run the injector for 20 ms of operation as follows:
#include
AF_DCMotor motor1 (1);
void setup() { // put your setup code here, to run once:
}
void loop() { // put your main code here, to run repeatedly: motor1.setSpeed(500); motor1.run(FORWARD); delay(20); motor1.run(RELEASE); delay(10000);
}
The injector was actuating with very low power and seems will not be able to actuate for sufficient flow rate. However, when the injector was connected in direct contact with battery previously, it was grabbing more current and a large tick sound was observed assuming good operation.
Because GD injectors are intended to be driven by a pulse that contains three intervals with voltages of up to 70 V and currents of up to 12 A you will not succeed by just switching 12 V on the injector.
The attached article might give you an impression of what is needed (please see the graphic on page 72, and the current waveforms in the experimental results). If you manage to design a suitable periphery then you could drive it by an AVR on an Arduino board or by virtually any other microcontroller.
Very good answer from Joerg Fricke, it explains very clear how GDI Injector works.
Anyhow , your driving circuit for the injector is not OK
Perhaps you are right. I doubt how it was actuating using a 12V battery power.
yes , because you need to get a current of 12A, which would be very complicated to obtain starting with 12V supply
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