Back to results
US 12,158,131 B2Granted
Fuel system
AssigneeCummins Inc.
InventorsAnthony K. Perfetto, Samuel C. Geckler, Adam C. Cecil
Life of this patent
Estimating the term…
Abstract
Low-cost fuel injection systems for internal combustion engines, including vapor fuel engines are provided.
Claims20
A fuel system, comprising:
- a source of a fuel;
- a fuel rail in fluid communication with the source of fuel to accumulate a quantity of the fuel at a fuel rail pressure;
- a port fuel injector in fluid communication with the fuel rail to receive a port fuel injector portion of the quantity of the fuel at the fuel rail pressure;
- a direct fuel injector in fluid communication with the fuel rail to receive a direct fuel injector portion of the quantity of the fuel at the fuel rail pressure;
- a cylinder defining a combustion chamber;
- and
- an intake port selectively supplying air to the combustion chamber, the port fuel injector in fluid communication with the intake port to supply the port fuel injector portion of the quantity of the fuel to the intake port, the direct fuel injector in fluid communication with the combustion chamber to supply the direct fuel injector portion of the quantity of the fuel to the combustion chamber, wherein the port fuel injector portion of the quantity of the fuel and the direct fuel injector portion of the quantity of the fuel are selectively supplied to the combustion chamber based on an on-time fuel command.
4 more elements
A port fuel injection system, comprising:
- a fuel rail system;
- a high flow fuel injector configured to supply fuel from the fuel rail system to a plurality of ports of an engine cylinder when activated;
- a first low flow fuel injector configured to supply fuel from the fuel rail system to one of the plurality of ports when activated;
- and
- a second low flow fuel injector configured to supply fuel from the fuel rail system to another of the plurality of ports when activated,
- wherein the high flow fuel injector, the first low flow fuel injector, and the second low flow fuel injector are selectively activated in response to a fuel demand.
3 more elements
A port fuel injection system, comprising:
- a fuel rail system;
- a high flow fuel injector configured to supply fuel from the fuel rail system to a plurality of ports of an engine cylinder when activated;
- a first low flow fuel injector configured to supply fuel from the fuel rail system to the plurality of ports of the engine cylinder when activated;
- and
- a second low flow fuel injector configured to supply fuel from the fuel rail system to the plurality of ports of the engine cylinder when activated,
- wherein the high flow fuel injector, the first low flow fuel injector, and the second low flow fuel injector are selectively activated in response to a fuel demand.
3 more elements
A vapor port fuel injection system, comprising:
- a fuel rail;
- a high flow fuel injector including an inlet fluidly coupled to the fuel rail to receive vapor fuel contained in the fuel rail and an outlet in flow communication with a plurality of fuel runners;
- a plurality of low flow fuel injectors including a first low flow injector having an inlet fluidly coupled to the fuel rail and an outlet in flow communication with one of the fuel runners, and a second low flow injector having an inlet fluidly coupled to the fuel rail and an outlet in flow communication with another of the fuel runners, each of the fuel runners being in flow communication with an intake port of a cylinder of an engine;
- and
- a single controller electrically coupled to the high flow fuel injector to power the high flow fuel injector and electrically coupled to the plurality of low flow fuel injectors;
- wherein the controller is configured to respond to a fuel demand by activating each of the high flow fuel injector and the plurality of low flow fuel injectors for substantially the same period of time.
3 more elements
Dependencies are inferred from the claim text.