Engine with gaseous and/or liquid fuel injector
AssigneeFord Global Technologies, LLC
InventorsJoseph Norman Ulrey, Ross Dykstra Pursifull
Life of this patent
Estimating the term…
Abstract
In one example, a system for a vehicle travelling on a surface is described. The system includes an engine with a cylinder. The cylinder includes a fuel injector that is supplied with gaseous fuel and liquid fuel by a fuel delivery system. The fuel injector is mounted in the vehicle such that the fuel injector inlet faces at least partially toward the road surface. The orientation of the fuel injector enables a quick transition from liquid fuel to gaseous fuel because the gaseous fuel can rise to the injectors and be preferentially injected. Further, various approaches are described from transitioning operation between gaseous and liquid fuel injection.
Claims17
A method of controlling an engine cylinder, comprising:
- delivering liquid fuel to a first, direct, injector of the cylinder;
- delivering gaseous fuel to the second, port, injector of the cylinder;
- and
- transitioning the second injector from gaseous fuel to liquid fuel responsive to an injection rate of first injector being above a threshold.
A method of controlling an engine cylinder, comprising:
- delivering liquid fuel to a first, direct, injector of the cylinder;
- delivering liquid fuel to the second, port, injector of the cylinder;
- and
- transitioning the second injector from liquid fuel to gaseous fuel responsive to an injection rate of first injector being above a threshold.
A method of controlling an engine cylinder, comprising:
- delivering liquid fuel to the cylinder's direct injector;
- selectively delivering gaseous and liquid fuel to the cylinder's port injector;
- transitioning the second injector from gaseous to liquid fuel responsive to the first injector reaching a maximum injection rate and insufficient engine power;
- and
- transitioning the second injector from liquid to gaseous fuel responsive to the first injector reaching the maximum injection rate and engine knock.
Dependencies are inferred from the claim text.