A fuel supply system for an internal combustion engine includes an air compressor, an air cooler connected downstream of the air compressor and the compressed air supply passage, and a bypass passage connected downstream of the air compressor. The fuel supply system also includes a fuel injector secured to the compressed air supply passage or secured to the bypass passage and a valve connected between the air compressor and the air cooler, the valve being configured to block a flow of intake air to the air cooler, causing the intake air to flow to the bypass passage or to permit the flow of intake air to the air cooler.

An internal combustion-type engine or powertrain that is capable of burning wet-alcohol fuel mixture and including a piston reciprocating within a cylinder attached to a cylinder head and connecting to a crank shaft via a connecting rod. An intake cam and valve is mounted within an intake port formed in the cylinder head and an exhaust cam and valve is mounted within an exhaust port also formed in the cylinder head. A pressurized fuel source is introduced into the cylinder by a fuel injector and the percentage of water in the alcohol/water mix operates to prolong the cylinder pressure in order to increase a mean effective pressure (IMEP), leading to a higher torque (improved Brake Mean Effective Pressure—BMEP) of the engine via a longer pressure pulse attained during the period of preferred mechanical advantage of the crank-arm of the engine.

A system and method for dynamically controlling an aggregate load on a generator is described. Fuel change data for a gaseous fuel for the generator is identified. The fuel change data indicates a change in fuel type for the generator. A controller identifies at least one load portion from the aggregate load associated with the change in fuel type and generates a switch command for a switch coupled to the at least one load in response to the change in fuel type.

A dual-fuel internal combustion engine includes: cylinders for combusting a first liquid fuel having a first ignitability in a first operating mode, and a second liquid fuel having a second lesser ignitability, in a second operating mode; a main injection system including a main injector for each cylinder, for feeding the first liquid fuel to the respective cylinders in the first operating mode and for feeding the second liquid fuel to the respective cylinders in the second operating mode; and a pilot injection system including a pilot injector for each cylinder, via which the first liquid fuel can is feedable to the respective cylinders in the second operating mode for igniting the second liquid fuel. The main and pilot injection systems are coupled such that in the second operating mode the first liquid fuel, is feedable to the respective main injector as a working fluid and/or a barrier fluid.

Separation of carbon dioxide from the exhaust of an internal combustion engine, the production of hydrogen from water, and reformation of carbon dioxide and hydrogen into relatively high-octane fuel components.

A method of operating a dual fuel engine includes conveying intake air, and a first fuel as a vapor and as a liquid, into a combustion cylinder in an engine, and directly injecting a second fuel into the combustion cylinder to form a first combustion charge of the first fuel as a vapor and as a liquid, the second fuel, and intake air. The second fuel is ignited to initiate combustion of the first combustion charge. Operating the dual fuel engine further includes varying at least one of, a vapor proportion of the first fuel or a total proportion of the first fuel, in a subsequent combustion charge to mitigate undesired combustion. The first fuel can include a liquid alcohol fuel. The second fuel can include a liquid compression-ignition fuel. Related apparatus and control logic is also disclosed.

Various methods and systems are provided for a method for a multi-pressure fueling system. In one example, the multi-pressure fueling system includes providing a first fuel delivery pressure enabling high pressure direct injection of a fuel at a first injector and a second fuel delivery pressure insufficient for high pressure direct injection, at a second injector, based on engine operation.

A method and system are provided for adjusting a speed of a turbocharger compressor using an electric motor in response to a relative substitution rate of first and second fuels in a multi-fuel engine.

Methods and systems for flex fuel engines that have both port fuel injection and direct injection. Operating an engine system includes determining a percent of ethanol in a fuel and determining whether the percent of ethanol is greater than a predetermined threshold. When the percent of ethanol is greater than the predetermined threshold, fuel is supplied only through the direct injection injectors. When the percent of ethanol is not greater than the predetermined threshold, fuel is supplied through a combination of the direct injection injectors and port fuel injection injectors.

A fuel injector feeds fuel to a combustion chamber of a cylinder of a dual-fuel engine and includes: a main body having a needle guide; a nozzle needle guidable in the needle guide; a needle fuel chamber defined by the main body, coupleable to the combustion chamber, wherein the orifices are open in a first position of the nozzle needle and closed in a second position of the nozzle needle; a first line arranged in the main body, and being coupled to the needle fuel chamber, via the first line a fuel being introduceable into the needle fuel chamber. In the main body a second line is coupleable to the needle guide and to a control chamber of a control valve of the fuel injector, wherein via the second line a fuel is feedable to the needle guide as barrier fluid and to the control chamber as working fluid.