How does the ECU sync with the engine?
A cam or phase sensor is required to enable the ECU to “sync” with the engines firing stroke. The “Cam sync sensor” drop down option must be set to “Connected”, the “Signal type” set appropriately and the relevant “Trigger pattern” selected.
How does a power management system work on an ECU?
The power management system also allows the ECU to have full control over when it powers itself down – i.e. not necessarily when you turn off the ignition switch. Once the correct voltages are supplied, the microprocessors can begin to boot up. Here the main microprocessor reads software from the memory and performs a self-check.
How to synchronize ignition timing with idle spark control?
When correctly adjusted, the ECU should maintain the static timing value when revving the engine; simulating locked-out timing advance. Afterwards, deactivate the EFI software “Enable Static Timing Set” & enable the “Idle Spark” control. Verify the ignition timing is synchronized throughout the RPM range, and your done.
Can a sequential ignition system be used on a standard engine?
You are correct, there is no advantage introducing a sequential ignition system on a standard engine. The three pulses fired from the ECU are in sequence, the timing of which is calculated by the ECU based on engine speed, intake air temp, throttle position etc. This circuit doesn’t need to worry about the working of the ECU.
How does the engine control unit ( ECU ) work?
The ECU can then perform an action on the engine, allowing the correct amount of power to control actuators precisely. These can include controlling fuel injector pulse width, exact timing of the ignition system, opening of an electronic throttle body or the activation of a radiator cooling fan.
Is the ECU the same as the transmission?
In the Automotive industry, the term ECU often refers to an Engine Control Unit (ECU), or an Engine Control Module (ECM). If this unit controls both an engine and a transmission, it is often described as a Powertrain Control Module (PCM).
How does the ECU work in a Jeep Cherokee?
The ECU is able to advance or retard ignition timing by controlling the ignition coil through the ignition control module. The ICM consists of a solid state ignition circuit, an integrated ignition circuit and an integrated ignition coil that can be removed and serviced separately if necessary. The ECU provides an input signal to the ICM.
What does the ECU do at full throttle?
It doesn’t stop there. For best power levels and safe combustion, the ECU must change the ratio of the mixture and inject more fuel under full throttle than it would during cruising – this is called a ‘rich mixture’.