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US 12,152,529 B2Granted
Fuel bypass system for gaseous-fueled engine
AssigneeGenerac Power Systems, Inc.
InventorsSteven W. Craig, Andrew P. Sibrel, Aaron J. Baska, Douglas R. Clement
Life of this patent
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Abstract
A method of operating a forced induction gaseous-fueled engine includes mixing gaseous-fuel and engine intake air to form a mixture at a fuel mixer. The method includes delivering the mixture to an intake manifold by at least partially bypassing a charge air cooler.
Claims13
A method of operating a forced induction gaseous-fueled engine comprising:
- delivering gaseous-fuel to an intake manifold via a bypass line by at least partially bypassing a charge air cooler;
- providing a throttle valve being positioned between, and in fluid communication with, the charge air cooler and the intake manifold,
- wherein the bypass line is in fluid communication with a fuel line, the bypass line being upstream from an inlet of the charge air cooler and the intake manifold and downstream from the throttle valve;
- during startup of the engine, at least partially closing the throttle valve, and at least partially opening the bypass valve;
- at least partially closing the bypass valve when an engine operating characteristic exceeds a predetermined threshold;
- and
- at least partially opening the throttle valve when the engine operating characteristic does not exceed the predetermined threshold.
4 more elements
A power backup system comprising:
- a generator including:
- a compression device;
- a charge air cooler positioned downstream from the compression device;
- an intake manifold positioned downstream from the charge air cooler;
- a throttle valve positioned between, and in fluid communication with the charge air cooler and the intake manifold;
- a bypass line in fluid communication with a fuel line;
- the bypass line being connected upstream from the charge air cooler and downstream from the throttle valve, wherein a fuel is delivered to the intake manifold via the bypass line by at least partially bypassing the charge air cooler;
- a combustion system for generating mechanical power;
- an electricity generating system for generating electrical power from the combustion system;
- and
- a controller, the controller being configured to at least partially close the throttle valve and at least partially open a bypass valve during startup of the generator, the controller further being configured to at least partially close the bypass valve when an engine operating characteristic exceeds a predetermined threshold and to at least partially open the throttle valve when the engine operating characteristic does not exceed the predetermined threshold;
- and
- a transfer switch connected to an electrical load, the generator, and a main power source, wherein the transfer switch is configured to connect the electrical load to either the generator or the main power source.
10 more elements
Dependencies are inferred from the claim text.