Multiple injection blend for direct injected engines
AssigneeGM Global Technology Operations LLC
InventorsJesse M. Gwidt, Jonathan T. Shibata, Vijay Ramappan, Stuart R. Smith, Michael J. Lucido
Life of this patent
Estimating the term…
Abstract
A fuel injection system for a direct fuel injection engine is provided. The system includes an injection mode module that selects a fuel injection mode to be one of a single injection mode and a dual injection mode during engine operation and a fuel injection command module that commands fuel injection events based on a crankshaft position, the fuel injection mode and a fuel percentage blending schedule.
Claims21
A fuel injection system for a direct fuel injection engine, comprising:
- an injection mode module that selects a fuel injection mode to be one of a single injection mode and a dual injection mode during engine operation;
- and
- a fuel injection command module that commands fuel injection events based on a crankshaft position, the fuel injection mode and a fuel percentage blending schedule.
A fuel injection method for a direct fuel injection engine, comprising:
- operating the engine in a single injection mode;
- commanding fuel at a first rate during an intake cycle;
- receiving a request to transition from a single injection mode to a dual injection mode;
- and
- transitioning to the dual injection mode by commanding fuel at a second rate and at a third rate during the intake and compression cycles, wherein the second rate is decreased and the third rate is increased during subsequent cycles until target second and third rates are reached.
Dependencies are inferred from the claim text.