Cold start up auxiliary system for alcohol and flex engines with air-inlet and alcohol warm up
An internal combustion vehicle cold start control system method is provided. The method includes warming alcohol and air when a door handle is actuated, while the engine is cold and starting an electric turbine connected to an intake manifold. The method also includes actuating valves allowing recirculation of the warmed air through the intake manifold and actuating spark plugs providing an initial warm-up of electrodes and engine cylinders if the temperature is less than 30° C. The starter motor is driven by 2-4 turns of a crankshaft axle so that any cold air in an air filter at the cylinders' entrance is drawn inside and is expelled by the exhaust system. A small volume of the warmed alcohol fuel is maintained in the fuel injectors. The method also includes injecting the warmed alcohol, verifying the minimum air temperature; and deactivating the system after appropriate warm-up of the engine.
1. A cold start control system method for a vehicle having an internal combustion engine, the method comprising:
warming alcohol and air, to be combusted, using electrical heaters ( 3 , 5 , 6 , 11 , 12 , 13 , 26 , 27 , 28 , 55 , 56 , 57 , 65 , 66 , and 67 , 101 ) when a door handle of the vehicle is actuated, while the engine is cold;
starting an electric turbine ( 100 ), connected to an intake manifold ( 10 );
actuating valves ( 201 , 202 , 203 , 204 , 205 ) to allow recirculation of warmed-up air through return passages and the intake manifold ( 10 );
actuating spark plugs of the engine to provide an initial warm-up of electrodes and an interior of engine cylinders if the temperature is less than 30° C.;
maintaining intake air warm-up ( 108 ) by the electrical heaters ( 26 );
driving the starter motor by 2 to 4 turns of a crankshaft axle ( 114 ) so that any cold air contained in an air filter at an entrance of the cylinders is drawn inside the cylinders and is expelled by the engine's exhaust system;
maintaining a small volume of a warmed-up alcohol fuel ( 112 ) in an interior of fuel injectors ( 1 ) of the engine;
injecting the warmed-up alcohol fuel ( 112 );
verifying a minimum air temperature; and
deactivating the system after an appropriate warm-up of the engine.
2. The method, according to claim 1 , further comprising:
maintaining warm up by means of turbine ( 100 ) if an ambient air temperature is less than a predetermined minimum temperature.
3. The method, according to claim 1 , further comprising:
closing a warmed up air passage ( 120 ): and
clearing the air passage via a thermostatic valve ( 21 ), if an ambient temperature is between a predetermined minimum and a predetermined maximum temperature.
4. The method, according to claim 1 , further comprising:
closing a warmed up air passage ( 120 ) via a thermostatic valve ( 21 ), if an ambient temperature is greater than a predetermined maximum temperature.