A fuel supply device includes a fuel supply passage, a fuel pump, a pressure-regulating valve, and a housing. The fuel supply passage is in communication with the fuel injector. The fuel pump pumps the fuel to the fuel supply passage. The pressure-regulating valve regulates the pressure of the fuel in the fuel supply passage. The housing is disposed in the fuel tank. The housing accommodates the fuel pump and the pressure-regulating valve. The fuel supply passage is formed within the housing. The pressure-regulating valve is connected to an end portion of the fuel supply passage formed in the housing. The volume of the end portion of the fuel supply passage in the housing is configured to increase with increasing pressure of the fuel.

A method to prevent generation of impact noise caused by an armature contacting a stopper due to a return spring and damage of the armature and a stopper without adding a part. Excitation of an electromagnetic coil 4 causes an armature 9 at a standby position to move in a plunger 7 direction so as to move the plunger 7 inserted in a pressurizing chamber 3 in a tip end direction against a return spring 8 to a level such that fuel is not injected from an injection nozzle 2. Fuel supplied from a fuel tank to the pressurizing chamber 3 through a fuel intake pipe 10 and inlet check valve 11 is pressurized and vapor included in the fuel inside the pressurizing chamber 3 is discharged to a fuel return pipeline 14 through a spill valve 12 and return passage 13. Excitation of the electromagnetic coil 4 is stopped, and then the electromagnetic coil 4 is re-excited prior to the armature 9 and plunger 7 reaching the standby position due to the return spring 8, such that the return speed of the armature 9 is reduced and an impact when the armature 9 contacts a stopper 15 is mitigated.

The invention relates to a device for the fuel treatment such as petrol or diesel for internal combustion engines. The device has a housing provided with fuel supply lines at each of its opposite ends thereof. A central opening in the tubular housing that contains a metal bar that is formed of an alloy composition including copper, zinc, tin, manganese, aluminum, and iron. And the liquid fuel circulates through the fuel line in the housing where the metal center bar displaces to the second liquid fuel line.

A protection structure for the fuel pump connection part includes a top plate 20 that has fuel pump connection parts 23, 25, and a cover member 30 that covers the top plate 20 and the fuel pump connection parts 23, 25. The cover member 30 includes a top plate cover part 31, hole parts 39, 41, and connection-part cover parts 45, 55. The top plate cover part 31 and the connection-part cover parts 45, 55 are integrally formed. The connection-part cover parts 45, 55 includes movable parts 47, 57 that move with respect to the top plate cover part 31, and the fuel pump connection parts 23, 25 are exposed in a state where the movable parts 47, 57 have moved in a separating direction from a front surface side of the top plate cover part 31.

A tank made of resin provided with a barrier layer, which prevents the barrier layer from rolling up and has improved durability. In a tank made of resin that includes a barrier layer provided on an inner surface of a tank body made of resin, an opening part is provided in the barrier layer, a thick part projecting toward an inside or an outside of the tank body is provided in a resin layer at an outer peripheral part of the opening part, and the barrier layer and a casting flange part at a base of an oil filling port tubular part are molded with the resin of the tank body in a state in which the casting flange part is located at the thick part.

A high-pressure fuel pump includes a pump housing, a receiving space in the pump housing, a pressure pulsation damper in the form of a diaphragm cell having two diaphragms, which pressure pulsation damper is arranged in the receiving space, and a holding device for holding the diaphragm cell in the receiving space. The holding device includes a connection portion, which is connected to the pump housing rigidly both in an axial direction and in a radial direction. The connection portion is fastened to the pump housing, both in the axial direction and in the radial direction, to an inner lateral surface of the pump housing that delimits the receiving space.

The invention relates to an internal combustion engine that comprises a first Brayton cycle comprising a mixed ionic-electronic conducting (MIEC) membrane that separates the O.sub.2 from the air such that the suctioned air current is free from N.sub.2; a second Brayton cycle combined in a binary manner with the first Brayton cycle and nested with a cycle selected from an Otto cycle and a diesel cycle performed by means of oxy-combustion. The second Brayton cycle transmits mechanical energy and thermal energy from exhaust gases to the first Brayton cycle. The first Brayton cycle provides to the second Brayton cycle compressed O.sub.2 from the MIEC membrane. By means of the present engine, the NOx emission into the atmosphere is prevented by the separation of N.sub.2 in the MIEC membrane.

A fuel demand valve that opens with minimal engine suction pressure. The fuel demand valve has an inlet housing and an outlet housing with a valve door in the outlet housing that moves to allow flow through the valve when exposed to a pressure difference sufficient to overcome a spring internal to the outlet housing. The inlet housing includes a shelf, and two gaskets, one large and one small, are disposed between the shelf and the valve door such that they define different surface areas on the valve door. The different surface areas define the amount of force required to be exerted on the valve door for fuel to flow when exposed to fuel supply and engine suction pressures. The different surface areas provide a mechanical advantage whereby lower suction pressure from the engine exerts the same force as a higher fuel supply pressure on the valve door enabling lower fuel pressure operation.

The invention relates to a fluid circuit (3) comprising: —a supply line (5) for carrying a fluid from a pump (4) connected to a fluid tank (2) to an equipment (8), the supply line having a portion which is divided into a main line (10) including a heat exchanger (13), and a by-pass line (15) for by-passing said heat exchanger; —a first valve (31) for controlling the respective fluid flows in the main line (10) and in the by-pass line (15), and a first control device (33) for controlling the first valve (31) depending on a first parameter (T) of the fluid; —a pressure regulation circuit for carrying fluid from the supply line (5) towards the fluid tank (2), said pressure regulation circuit comprising a pressure regulation valve (23) for controlling the flow of fluid directed back to the fluid tank (2); wherein the pressure regulation circuit comprises: —a first recirculation line (21) branching from the supply line (5) downstream from the by-pass line outlet (17); —a second recirculation line (22) branching from the supply line (5) upstream from the by-pass line inlet (16); —a second valve (32) for controlling the respective fluid flows in the first recirculation line (21) and in the second recirculation line (22), and a second control device (33) for controlling the first valve (31) depending on a second parameter (T) of the fluid.

A fuel tube protector for a vehicle includes a protective member configured to surround a circumferential surface of a fuel tube disposed between a fuel tank and an internal combustion engine, and a fixing member provided at both distal ends of the protective member to fix the protective member to the fuel tube, wherein each fixing member includes a body surrounding and holding the circumferential surface of the fuel tube, and first fixing legs protruding from a side surface of the body and fastened to the respective distal end of the protective member.