244001929 - E5032 METHANE FUEL SYSTEM ELECTRONIC MANAGEMENT DESCRIPTION
Description
The petrol supply system is managed by a control unit that also controls both ignition and injection.The methane supply system is managed by another control unit that controls methane injection and the switching logic for the methane/petrol fuel system which takes place automatically or manually, using the special switching button in the dashboard.The two control units are connected to one another by means of a special high speed CAN line which allows optimum engine management in all operating conditions and with any type of fuel supply system.Depending on the signals received from the numerous sensors, the two control units, which share some signals from certain sensors, operate the respective actuators that are connected, managing the following systems:- petrol supply
- methane supply;
- air supply;
- engine cooling;
- fuel vapour recirculation.
- - control of combustion - Lambda sensors
- - control of exhaust with catalytic silencer.
- the catalytic silencer which, in the case of a malfunction, does not convert the pollutants produced by the engine;
- the Lambda sensors (oxygen sensors);
- misfire, where the unburnt fuel reaches the catalyzer where the thermal conversion reactions produce a sudden increase in temperature damaging the actual catalyzer.
The engine normally runs on methane. |
For starting and after refilling with methane the engine normally runs on petrol for a few seconds to keep the pump, the injectors and the specific ducts working properly. |
there should be no manual switching from petrol to methane operation and viceversa during starting. It also only takes place if the engine rotation speed is less than 2000 rpm. |