Fuel switching for dual fuel engine
AssigneeMazada Motor Corporation
InventorsAkira Takemoto, Nobuhide Seo, Kazuho Douzono, Takuji Kawada
Life of this patent
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Abstract
An internal combustion engine combusts a first fuel or a second fuel. A method for controlling the engine comprises supplying first fuel to at least one combustion chambers of the internal combustion engine, stopping the supply of the first fuel to the combustion chamber in response to an engine operating condition, and fueling with the second fuel to the at least one combustion chamber after a predetermined period, so as to maintain an engine speed within a predetermined range.
Claims19
Method for controlling an internal combustion engine combusting a first fuel or a second fuel, the method comprising:
- supplying the first fuel to at least one combustion chamber of said internal combustion engine;
- stopping the supply of said first fuel to said at least one combustion chamber for a predetermined period;
- maintaining a rotational speed of said internal combustion engine within a predetermined range during said predetermined period;
- and
- fueling with the second fuel to said at least one combustion chamber after said predetermined period.
Vehicle powertrain comprising:
- an internal combustion engine combusting a first fuel or a second fuel;
- a fuel supply system configured to selectively supply the first fuel or the second fuel into combustion chambers of said internal combustion engine;
- an electric motor capable of supplying torque to said internal combustion engine;
- and
- a control system configured to control said fuel supply system to:
- supply the first fuel to at least one of said combustion chambers;
- stop the supply of said first fuel to said at least one combustion chamber;
- control said electric motor to increase its torque so as to maintain a rotational speed of said internal combustion engine within a predetermined range for a predetermined period;
- and
- fuel with the second fuel to said at least one combustion chamber after said predetermined period.
Vehicle powertrain comprising:
- an internal combustion engine combusting a first fuel or a second fuel;
- a fuel supply system configured to selectively supply the first fuel or the second fuel into combustion chambers of said internal combustion engine;
- and
- a control system configured to control said fuel supply system to:
- supply the first fuel to at least one of said combustion chambers;
- stop the supply of said first fuel to said at least one combustion chamber;
- and
- fuel with the second fuel to said at least one combustion chamber after a predetermined period, and
- wherein said control system is further configured to control said vehicle powertrain to maintain a rotational speed of said internal combustion engine within a predetermined range during said predetermined period.
Dependencies are inferred from the claim text.