Method for operating an engine
AssigneeCaterpillar Motoren GmbH & Co. KG
InventorsEike Joachim Sixel, Andreas Banck, Michael Sturm, Carsten Rickert
Life of this patent
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Abstract
A method for operating an engine is disclosed. The method may include supplying air from a primary air supply unit to an intake conduit. The method may also include supplying air to the engine from the intake conduit. The method may further include selectively supplying air from a secondary air supply unit to the intake conduit. In addition, the method may include maintaining an air fuel ratio between a first threshold value and a second threshold value during an increase in engine load increase by controlling a supply of air from the secondary supply unit to the intake conduit.
Claims19
A method for operating an engine, comprising:
- supplying air from a primary air supply unit to an intake conduit;
- supplying air to the engine from the intake conduit;
- increasing a supply of gaseous fuel to the engine during an increase in engine load;
- selectively supplying air from a secondary air supply unit to the intake conduit;
- and
- maintaining an air fuel ratio between a first threshold value and a second threshold value during the increase in engine load by controlling a supply of air from the secondary supply unit to the intake conduit, and
- selectively supplying liquid fuel in addition to the increased supply of gaseous fuel when the air fuel ratio reaches the first threshold value.
An engine, comprising:
- a primary air supply unit configured to supply air permanently to an intake conduit;
- a secondary air supply unit configured to selectively supply air to the intake conduit;
- and
- a controller configured for:
- increasing a supply of gaseous fuel to the engine during an engine load increase;
- selectively controlling a supply of air from the secondary air supply unit in the intake conduit such that an air fuel ratio is maintained between a first threshold value and a second threshold value during the engine load increase;
- and
- selectively supplying liquid fuel to the engine when the air fuel ratio reaches the first threshold value.
Dependencies are inferred from the claim text.