ECO Start/Stop, Basic Function - GF07.10-D-1051A

Engine All (Light transporter) 

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 

General 

For a stationary vehicle, the ECO start/stop function switches the engine off automatically and starts it again, as soon as the driver wishes to drive off. Shutting off the engine when the vehicle is standing still reduces fuel consumption and exhaust gas emissions.

Function requirements 

• Ignition ON (circuit 15)
• Engine management ON (circuit 87M)
• Engine in operation
• Outside temperature between -10 and 40°C
• System diagnosis complete and fault-free
• Speed of 8 km/h exceeded previously during forward travel (manual transmission)
• Indicator lamp in the ECO start/stop function button illuminated

Function 

When the ECO start/stop function is operational and all vehicle-related conditions are fulfilled, it switches the engine off automatically after the vehicle is braked to a standstill. All vehicle systems remain active. It then restarts the engine automatically to drive off again. In doing so, the ECO start/stop function helps to reduce the fuel consumption of the vehicle.

All of the systems participating in the ECO start/stop function continuously check their status and transmit this to the powertrain control unit and the combustion engine control unit. After the engine stops, the crankshaft angle in the rest position is stored in the combustion engine control unit using the crankshaft angle sensor. When the engine starts, synchronization of the fuel injection system and the ignition system that is otherwise required is no longer necessary due to the stored crankshaft angle.

Depending on which drive program is activated (depends on the model and equipment), the ECO start/stop function is deactivated.