Systems and methods for operating a fuel system that includes two separate fuel tanks are disclosed. In one example, fuel may be purged from a fuel rail in response to Reid vapor pressure of a fuel so that engine starting may be improved. A fuel with a higher Reid vapor pressure may be pumped into the fuel rail when the engine is expected to be cold started.

Disclosed is a valve needle for a needle valve of a slurry fuel injector valve, the valve needle comprising: a tip for abutting a needle valve seat of the needle valve; a sealing portion for location in a bore of the needle valve; and a fuel chamber portion between the tip and the sealing portion, wherein the fuel chamber portion is for location in a needle fuel chamber of the needle valve; wherein a surface of the sealing portion of the valve needle comprises at least one groove and wherein at least part of the or each groove extends in a direction that is non-perpendicular to an axial direction of the valve needle.

An integrated fuel filter device for a vehicle includes a fuel filter disposed at a fuel feed line between a bombe and an engine, a pump for delivering fuel inside the bombe to the engine via the fuel feed line, a first fuel filling line connected to an inlet of the fuel filter and configured to guide fuel refueled from an outside of the vehicle to the inlet of the fuel filter, a second fuel filling line connected between an outlet of the fuel filter and the bombe and configured to guide the fuel passing through the fuel filter to the bombe, and a variable shut-off valve for controlling a flow of the fuel delivered from the pump to the inlet of the fuel filter and a flow of the fuel delivered from the outlet of the fuel filter to the bombe.

An integrated fuel filter device for a vehicle includes a fuel filter disposed at a fuel feed line between a bombe and an engine, a pump for delivering fuel inside the bombe to the engine via the fuel feed line, a first fuel filling line connected to an inlet of the fuel filter and configured to guide fuel refueled from an outside of the vehicle to the inlet of the fuel filter, a second fuel filling line connected between an outlet of the fuel filter and the bombe and configured to guide the fuel passing through the fuel filter to the bombe, and a variable shut-off valve for controlling a flow of the fuel delivered from the pump to the inlet of the fuel filter and a flow of the fuel delivered from the outlet of the fuel filter to the bombe.

A dual-fuel integrated switch includes a bracket. A valve body is provided on one side of the bracket. The inside of the valve body is provided with a spool adapted to the valve body. The spool rotates in the valve body. The first flow passage and the second flow passage communicating with the first flow passage are provided in the spool, an arc-shaped groove is provided on the outer wall of the spool, and the third flow passage adapted to the groove is provided on the side wall of the valve body. The number of the third flow passages is two, and the arc formed by the third flow passage on the side wall of the valve body is the same as the arc at the outer end of the side wall of the groove.

A multiple fuel tank purge system and method includes providing a pair of fuel tanks, including a main fuel tank for containing impure fuel and a separate, auxiliary fuel tank that contains commercial canned fuel. The engine runs on the impure fuel from the main fuel tank while the engine is in normal use, and then employs a shutdown cycle that switches to the commercial canned fuel from the auxiliary fuel tank for some pre-set time period. This arrangement allows the engine to be purged of the impure fuel (by burning the impure fuel during the shutdown cycle) and replaced by the commercial pre-mixed fuel before the engine is finally shut down. The system may further include a novel fuel cap with a fuel line, a tank within a tank fuel container, and/or an electronically actuated shutdown cycle mechanism.

A fuel supply valve for a slurry fuel injector valve, the fuel supply valve comprising: a fuel inlet for fluid communication with a slurry fuel reservoir; a fuel outlet for fluid communication with a nozzle of the fuel injector valve; a pump chamber port for fluid communication with a pump chamber of the fuel injector valve; and a valve gate moveable between a first position, at which the fuel inlet is in fluid communication along a first slurry fuel flow path with the pump chamber port, and a second position, at which the fuel outlet is in fluid communication along a second slurry fuel flow path with the pump chamber port; wherein the valve gate is operable with a valve actuation liquid from an engine.

Disclosed is a slurry fuel injector valve, comprising: a fuel outlet valve through which slurry fuel is able to exit the slurry fuel injector valve towards a combustion chamber of an engine; a pump cavity; a pump element that divides the pump cavity into a pump chamber and an actuation chamber; a fuel conduit through which slurry fuel is flowable from the pump chamber to the fuel outlet valve; and an actuation fluid conduit through which actuation fluid is flowable from the actuation chamber to the fuel outlet valve.

An internal combustion engine in which when an ECU receives an engine stop command by an ON-operation of an engine stop switch, a supply of fuel from an injector to a fuel reformation chamber is stopped while a supply of fuel from an injector to a combustion chamber is continued, and the residual amount of a reformed fuel in passages is estimated, in this state. When the estimated residual amount reaches a predetermined amount or zero, the fuel supply from the injector to the combustion chamber is stopped, and an internal combustion engine is stopped.

The present invention provides a diesel power generation system using biofuel capable of reliably generating electric power using biofuel so as not to coagulate, whereby biofuel is used to drive the diesel engine and the generator is driven based on the driving force of the diesel engine to generate electricity, while driving the diesel engine with the desired efficiency, the biofuel is not solidified without deteriorating at high temperature. The diesel power generation system 10 using the biofuel of the present invention is provided with a first fuel heater 22 for heating the biofuel sent by the fuel feed pump 20 through the fuel feed circuit 18 to a second temperature range set lower than the first temperature range in which the diesel engine 14 is driven with a predetermined efficiency, a second fuel heater 24 disposed in a portion of the fuel feed circuit 18 between the first fuel heater 22 and the diesel engine 14 and heating the biofuel flowing therethrough, a temperature sensor 26 interposed on the upstream side of the diesel engine 14 of the fuel feed circuit 18 and measuring the temperature of biofuel flowing into the diesel engine 14, and, a control device 28 for controlling the second fuel heater 24 so that the biofuel flowing into the diesel engine 14 is maintained within the first temperature range, based on the measurement result of the temperature sensor 26.