Eco mode How does work?

[miraj]

How does the Eco mode work on non hybrid cars?How does it save fuel?

[Rumesh88]

Please stop opening multiple threads for the queries on the same vehicle. 

[Davy]

Varies from vehicle to vehicle, but the common mechanisms are:

1. Change shift points (automatic transmission):

The transmission shifts gears sooner to keep engine RPM minimal. Low revolutions means less combustion. Less combustion means less fuel consumed. This is the most commonly used method.

 

2. Optimise throttle responsiveness:

The ECU changes the way it reacts to the readings from the throttle position sensor. This means the accelerator pedal will behave slightly different than in normal mode. All done to minimise the use of fuel.

 

3. Lower idle RPM:

The ECU lowers the engine RPM when idle to burn less fuel. 

 

4. AC operated efficiently (Automatic or Climate Control AC):

Automatic AC works differently to minimise load on the engine and thereby save fuel.

 

Edited August 31, 2016 by Davy
Added more content.

[Rumesh88]

In one sentence, the EV mode makes your car a pain in the a$$ to drive.