摘要:
A fuel distributor for distributing fuel supplied by pressure through a fuel feed pipe by a fuel feed system to a plurality of fuel injectors is capable of effectively reducing the amplitude of a pulsative pressure wave and the sound levels of transmitted sounds. The fuel distributor includes a fuel rail, and a fuel distribution line including a pipe fitting connected to the fuel feed pipe, and first and second branch pipes each having one end connected to the pipe fitting and the other end connected to the fuel rail. The first and the second branch pipes are connected respectively to different parts of the fuel rail.
摘要:
A fluid pulse damper having increased dynamic range and sensitivity, being especially useful in suppressing pulsations in the fuel supply rail of an internal combustion engine. The damper is a longitudinal gas-filled plastic pillow having walls formed by opposed flexible short sides and opposed flexible long sides, and includes at least one internal self-contact element, and preferably a plurality of such elements. As the short sides flex, the elements make contact internally, shifting the damper into a different compression regime and extending the pressure/response over an increased range of pressures. A feature of some embodiments is that the inner surface within the contact elements is shifted into tension after the elements make contact, thereby stiffening the damper and increasing the damper's resistance to further deformation. The damper is formed of a plastic such as ultra-high molecular weight polyethylenes, high flow polyetherimides, or tubing grade polyphthalamides.
摘要:
A fuel pressure pulsation suppressing system of a fuel piping system for a gasoline engine having a plurality of cylinders disposed in a straight, V-shape or horizontal opposed shape with delivery pipes for distributing fuel to the cylinders of return-less type without a return circuit to a fuel tank, wherein the cross section of at least one of communication pipes forming the delivery pipes forms a flexible absorbing face, an orifice portion for damping pressure pulse wave caused by fuel injection is installed near a connection part between at least one delivery pipe and a supply pipe or a connection pipe, and the cross sectional area of the flow passage of the orifice should desirably be 0.2 times the sectional area of the flow passage of the connection pipe or the supply pipe or below.
摘要:
A fuel rail assembly with crossover conduits for communicating fuel between two fuel rails of a fuel-injected, spark ignited internal combustion engine is provided. The hose has a body with a mechanism for damping pressure pulsations within the fuel rail assembly.
摘要:
A fuel injector for an internal combustion engine including an in-cylinder fuel injection valve and an intake port fuel injection valve. An ECU controls an electromagnetic valve to keep a fuel inlet of a high pressure pump closed during an intake port injection mode during which fuel is injected only from an intake port fuel injection valve. As a result, even if the plunger reciprocates in the high pressure pump, fuel does not flow between the high pressure pump and a low pressure fuel path. Thus, pressure pulsation that would be caused by the operation of the high pressure pump does not occur in low pressure fuel.
摘要:
A fuel-injection system includes at least one fuel distributor and at least one fuel injector. The fuel distributor is embodied as an autonomous component and has a plurality of valve seats having several inner longitudinal openings in which the fuel injectors may be inserted. The valve seats, by their ends facing away from a fuel-supply channel of the fuel distributor, end in a freely exposed manner. At these ends of the valve seats at least one retaining element in each case is premolded or formed for the loss-proof mounting of the particular fuel injector. This fuel-injection system is particularly suited for the use in mixture-compressing internal combustion engines having external ignition.
摘要:
The invention relates to a fuel system having pressure pulsation damping. The invention specifically locates restrictors in relation to identified critical elements of the system to control the maximum operating system pulse magnitude, as well as damping the overall pulsations of the system.
摘要:
A no-return loop fuel injection system supplies fuel from a fuel pump to an injector fuel rail, through a fuel line. A biased closed pressure control valve communicates with the fuel line and has a valve head preferably of a diaphragm type carrying a fuel side having first and second areas which are segregated and defined by a valve seat when the pressure control valve is closed. An opposite second side of the pressure control valve is exposed to a reference pressure and a closure biasing force. The pressure control valve opens when a hydraulic opening force induced by a fuel pressure exerted upon the first area, plus a fuel pressure exerted upon the second area, is greater than the net reference pressure and closure biasing forces. Preferably, the first area is smaller than the second area, thus manipulating the effects of the fuel pressures exerted upon the first and second areas with respect to opening the valve. When the pressure control valve is open, the system operating pressure exposed to both the first and second areas is sufficient to produce the hydraulic force necessary to keep the valve open. Preferably, the pressure control valve is part of a pressure valve assembly of a fuel pump module located inside a fuel tank. The pressure valve assembly preferably has a flow check valve orientated in a parallel flow configuration to the pressure control valve when the fuel pump is of a variable speed type, or, for systems utilizing constant speed pumps the check valve is replaced with a flow bypass orifice.
摘要:
A fuel delivery system for a motorcycle including an engine having at least one combustion chamber. The fuel delivery system includes a fuel injector configured to deliver a fuel charge to an intake passage of the engine. The motorcycle further includes an air box defining an interior space, or plenum chamber. An inlet duct defines at least a portion of the intake passage and further defines an axis. The inlet duct also defines an opening to the intake passage disposed within the plenum chamber. A spray axis of the fuel injector is oriented parallel to the axis of the inlet duct and the fuel injector is supported by the air box.
摘要:
A fuel injector with a neck at an upstream end and a downstream end located at a distal end from the upstream end, a fuel channel extending from the upstream end to the downstream end and defining a substantially longitudinal axis, and a check valve located in the fuel channel proximate the upstream end; and a fuel rail with a housing defining an opening having a substantially longitudinal axis passing therethrough, and a one-way flow inhibitor is located in the opening. When removing the fuel injector from the fuel rail, reducing leaks by biasing a plunger of the check valve against a seat of the check valve in the fuel injector and biasing a plunger of the one-way flow inhibitor against a seat of the one-way flow inhibitor in the fuel rail.