Systems and methods for supplying primary fuel and secondary fuel to an internal combustion engine may include supplying a first amount of the primary fuel and a second amount of the secondary fuel to the internal combustion engine. The system may include a first manifold to provide primary fuel to the internal combustion engine, and a primary valve associated with the first manifold to provide fluid flow between a primary fuel source and the internal combustion engine. A second manifold may provide secondary fuel to the internal combustion engine, and a fuel pump and/or a secondary valve may provide fluid flow between a secondary fuel source and the internal combustion engine. A controller may determine a total power load, the first amount of primary fuel, and the second amount of secondary fuel to supply to the internal combustion engine to meet the total power load.

An evaporated fuel treatment apparatus includes an electrically-operated valve disposed between a full tank control valve and an atmosphere open port and a control unit that controls the electrically-operated valve, and the control unit performs valve-closing control that fully closes the electrically-operated valve when a valve-closing condition is satisfied after the start of fuel supply, in which a value measured by a fuel volume measurement unit is equal to or greater than a first predetermined value determined in advance and a value detected by a pressure sensor is equal to or greater than a second predetermined value determined in advance.

A fueling device mounted on a vehicle, includes: a flow path forming member forming a flow path extending from a fueling port to a fuel tank of the vehicle; and a stay joined to a vehicle body, wherein the stay supports an outer end portion of the flow path forming member.

This engine is provided with multiple injectors, and an excess fuel return pipe. The injectors inject fuel from a fuel tank into a combustion chamber. The excess fuel return pipe returns excess fuel from the injectors to the fuel tank. The excess fuel return pipe is provided with multiple injector connecting pipes and multiple linking pipes. The linking pipes are formed from an elastically deformable hose. Each of the multiple injector connecting pipes is connected to the corresponding injector. Each of the multiple linking pipes links together two mutually adjacent injector connecting pipes. Across the multiple linking pipes, pipe connecting units, to which an injector connecting pipe and a linking pipe are connected, are arranged along the same straight line.

A fluid filter assembly is adapted to filter out contaminants from a fluid supply. The filter assembly includes a housing that is adapted to house a cylindrical filter element. The housing includes a lower housing and an upper housing. A top plate is secured to the upper filter housing. Both the top plate and upper filter housing include seals that are adapted to seal the filter. The filter includes threads formed on an exterior surface of the upper housing to allow the filter to be coupled to a filter mount. Dirty fuel enters the filter through the top plate by use of a plurality of openings formed in the top plate, passes through media of the filter element, and exits through a center opening formed in the top plate.

A steel pipe for a fuel injection pipe has a chemical composition consisting of, by mass %: C: 0.17 to 0.27%, Si: 0.05 to 0.40%, Mn: 0.30 to 2.00%, P: 0.020% or less, S: 0.0100% or less, O: 0.0040% or less, Ca: 0.0010% or less, Al: 0.005 to 0.060%, N: 0.0020 to 0.0080%, Ti: 0.005 to 0.015%, Nb: 0.015 to 0.045%, Cr: 0 to 1.00%, Mo: 0 to 1.00%, Cu: 0 to 0.50%, Ni: 0 to 0.50%, V: 0 to 0.15%, and the balance: Fe and impurities. The metal micro-structure consists substantially of tempered martensite, or tempered martensite and tempered bainite. The hardness is within the range of 350 to 460 HV1. A lattice spacing of a (211) diffraction plane measured by CoKα characteristic X-ray diffraction is 1.1716 Å or less, and a half-value width of the (211) diffraction plane is 1.200° or less. The number density of cementite having a diameter of 50 nm or more is 20/μm.sup.2 or less.

A fuel supply apparatus to be mounted in a vehicle includes an injector, a rear delivery pipe and a front delivery pipe connected to the injector, and a fixed flange that is provided in the rear delivery pipe to fix the rear delivery pipe to a PCU. The fixed flange includes a cutout.

Systems and methods for supplying primary fuel and secondary fuel to an internal combustion engine may include supplying a first amount of the primary fuel and a second amount of the secondary fuel to the internal combustion engine. The system may include a first manifold to provide primary fuel to the internal combustion engine, and a primary valve associated with the first manifold to provide fluid flow between a primary fuel source and the internal combustion engine. A second manifold may provide secondary fuel to the internal combustion engine, and a fuel pump and/or a secondary valve may provide fluid flow between a secondary fuel source and the internal combustion engine. A controller may determine a total power load, the first amount of primary fuel, and the second amount of secondary fuel to supply to the internal combustion engine to meet the total power load.

A clamping assembly and components, systems, and methods thereof can comprise a first clamp adapted to be provided around a first fuel line for an internal combustion engine to rigidly clamp the first fuel line to a bracket arrangement; and a second clamp adapted to be provided around a second fuel line for the internal combustion engine, which is spaced from the first fuel line, to clamp the second fuel line to the bracket arrangement such that the second fuel line is movable according to a degree of freedom in a direction of assembly strain. The second clamp can include a bent clip, and the first and second clamps can be aligned with each other or offset by no more than a body length of either the first clamp or the second clamp.

A control apparatus for a fuel supply apparatus is used in an engine system. The engine system includes an engine including a fuel injection valve, and the fuel supply apparatus including a fuel pump configured to supply fuel in a fuel tank to a supply pipe connected to the fuel injection valve, and a relief valve provided in the supply pipe. The control apparatus for the fuel supply apparatus includes an executor configured to execute, when the fuel is supplied to the fuel tank, relief pressure control for driving the fuel pump to open the relief valve until a predetermined termination condition is satisfied.