Methods and systems are providing for improving zero flow lubrication (ZFL) of a high pressure fuel pump coupled to direct fuel injectors via a direct injection fuel rail. A ZFL transfer function for the fuel pump is learned while fuel is at non-nominal fuel bulk modulus conditions and corrected for variations from a nominal fuel bulk modulus estimate. When zero flow lubrication of the pump is requested, the pump is operated with a duty cycle based on the learned transfer function and an instantaneous estimate of the fuel bulk modulus to compensate for differences in fuel condition from the nominal fuel bulk modulus estimate.

What is proposed is an emulsifying system with an emulsifying device and an injection nozzle as well as an emulsifying device for producing a water-fuel emulsion for an internal combustion engine, wherein the emulsifying device is embodied as a rotor-stator emulsifying device and/or fluid flow machine and/or is connected or connectable directly to an injection nozzle. The emulsifying device has a housing and a shaft, the shaft being drivable in a contactless manner, the housing having a guide apparatus having a plurality of guide channels for guiding the flow, and/or the housing being made at least partially from fiber composite material. Moreover, an emulsifying method for producing a water-fuel emulsion is proposed in which water and fuel are fed to a rotor-stator emulsifying device and/or fluid flow machine for producing the water-fuel emulsion, and/or in which water and fuel are premixed in a first emulsifying stage and fed via a guide apparatus having a plurality of guide channels to a second emulsifying stage.

There is described a hydro-fuel composition of a water solution containing hydrogen, wherein the water solution has less than 1000 ppm total dissolved solids, and an oxidation reduction potential of less than 250 milliVolts. The hydro-fuel composition can be used in a diesel engine after the temperature of the diesel engine reaches a temperature of 80 C. to 90 C.

A method and a device for open- or closed-loop control of an amount of water mixed with a fuel is provided. A fuel supply is split into a first branch having a Venturi pipe with a vacuum connection and a second branch having a blocking valve. Water is supplied to the Venturi pipe vacuum connection, and the fuel-water mixture in the first branch and the fuel in the second branch is supplied to the fuel pump. Open-loop or closed-loop control is provided by either reducing fuel flow in the second branch with the stop valve such that the fuel flow in the first branch increases, increasing the amount of water mixed in the fuel at the Venturi pipe, or increasing fuel flow in the second branch such that first branch fuel flow decreases, decreasing the amount of water mixed in the fuel at the Venturi pipe.

A fuel filter system that does not require the periodic draining of a water sump. The system includes a fuel tank for storing fuel and a fuel filter fluidly coupled to the fuel tank for separating water from the fuel. A fuel pump has a suction side and a high pressure side. The high pressure side of the fuel pump is fluidly coupled to the fuel filter for pumping fuel to the fuel filter. A water emulsifier, such as an orifice, is fluidly coupled to the fuel filter to receive water and fuel from the fuel filter and form a water-fuel emulsion. The water-fuel emulsion is supplied to any point in the system on the suction side of the fuel pump, such that the water-fuel emulsion passes through the fuel pump and fuel filter.

Provided is a fuel composition prepared by adding gas-to-liquid oil and water to light cycle oil to conduct emulsification. The fuel composition is used as a fuel for a diesel engine (12) in a ship (10). The ship (10) includes a fresh water tank (15), an LCO tank (13), and a GTL tank (14) configured to store water, light cycle oil, and gas-to-liquid oil, respectively, and a mixer (16) configured to mix the water, the light cycle oil, and the gas-to-liquid oil fed from the respective tanks to produce the fuel composition.

Methods and systems are provided for synergizing the benefits of engine water injection in a hybrid vehicle system. During engine operation, in response to a change in driver demand, the controller may opt to switch between water injection states while using stored power assist. The selection may be based on the combination of water injection and stored power offset that provides the highest engine efficiency.

An apparatus including a reciprocating internal combustion engine with at least one piston and cylinder set and an intake stream; at least one liquid atomizer in fluid communication with the intake stream operable to provide a plurality of liquid droplets with a diameter less than 5 m to the intake stream; and a controller where the controller is able to adjust an index of compression for the engine by: calculating a wet compression level in response to an engine operating limit and adjusting the at least one liquid atomizer in response to the wet compression level.

A method and an apparatus for controlling an electric pump for furnishing water for injection into a combustion chamber of an engine are provided. The electric pump is connected to an inflow of a main water tank and has a high-pressure output at which the electric pump makes available water at a pressure elevated with respect to a pressure in the main water tank. The high-pressure output of the electric pump is connected to a return line that opens into a driving jet connector of a suction jet pump, a suction jet connector of the suction jet pump being connected to a further water tank, and a high-pressure output of the suction jet pump being connected to the main water tank.

There is described a hydro-fuel composition of a water solution containing hydrogen, wherein the water solution has less than 1000 ppm total dissolved solids, and an oxidation reduction potential of less than 250 milliVolts. The hydro-fuel composition can be used in a diesel engine after the temperature of the diesel engine reaches a temperature of 80 C. to 90 C.