Fuel feed devices for internal combustion engines专利检索-金属空气电池电池与电池专利检索查询-专利查询网

Fuel feed devices for internal combustion engines

阅读：505发布：2023-11-10

专利汇可以提供Fuel feed devices for internal combustion engines专利检索，专利查询，专利分析的服务。并且A fuel feed device for internal combustion engines has a main throttle operated by the driver and an auxiliary throttle which opens automatically and progressively as the air flow rate in the induction pipe increases. A pressurized liquid fuel injection means is located in the pipe downstream of the main throttle and controlled by an electromagnetic valve. A flat, opaque disc containing one or more ports is mounted on a shaft rotated by the engine. The ports pass a light beam between a light source and a photocell mounted on a displaceable common support coupled to the auxiliary throttle. When illuminated the cell energizes the electromagnetic valve. Each port has a spring-urged lever mounted adjacent to it so as to mask or expose part of the port, according to the centrifugal force due to the speed of the disc and hence of the engine. The shape of the port and displacement of the support are arranged so that more light passes, hence more current flows and the fuel flow is reduced or eliminated on deceleration of the engine. The levers are of sheet-metal pivoted between their center of gravity and their masking nose.，下面是Fuel feed devices for internal combustion engines专利的具体信息内容。

权利要求

1. For use with an internal combustion engine, a fuel feed device comprising in combination, in the induction pipe of the engine a main throttling member actuated by the driver; upstream of said main throttling member an auxiliary throttling member which opens automatically and progressively as the rate of air flow in the said pipe increases; injection means for injecting liquid fuel under pressure into that portion of the induction pipe downstream of the maiN throttling member; and a metering system adapted to respond to the position of the auxiliary throttling member and so to regulate the rate of flow of the fuel injected that the richness of the fuel-air mixture entering the induction pipe is substantially constant, at least for certain running conditions of the engine, said injection means being in the form of a source of fuel under pressure whose delivery circuit, leading into the said portion of the induction pipe, is controlled by at least one valve operated by an electromagnet, the metering system comprising a flat, opaque disc adapted to be rotated continuously by the internal combustion engine about a shaft perpendicular to its plane, said disc being placed between a radiation source and a radiation detector, a support connected to and displaceable by the auxiliary throttling member and bearing both said radiation source and said radiation detector; said disc containing at least one port adapted to admit the beam from the radiation source to the radiation detector; said detector being adapted to cause energization of the electromagnet, depending on whether or not it is irradiated, the assembly as a whole (more particularly the shape of the port and the rate of displacement of the support) being such that the electromagnet is energized during a fraction of each revolution of the disc which fraction varies in the same direction as the degree of opening of the auxiliary throttling member, a lever associated with each said port of said disc and mounted on the disc by means of a pivot substantially parallel to said shaft of the disc, a return spring arranged to bias said lever, the sites of the pivot and of the center of gravity of said lever, the shape of the lever and the force of the spring being so selected that, depending on whether the speed of the disc (and therefore of the engine) is above or below a given limit, the lever masks or exposes a portion of said port which, when the auxiliary throttling member is in the idling and deceleration positions, is swept by the radiation from said source directed towards the radiation detector, so that the lever comes into operation solely during deceleration periods to reduce or eliminate the total period of energization of the electromagnet and consequently the flow of fuel.

2. A fuel feed device according to claim 1, wherein each said lever has a nose arranged to effect said masking and is in the form of a portion of sheet-metal whose plane is parallel to that of the disc and placed there-against, said portion of sheet-metal being so shaped that the center of gravity of the lever and said masking nose thereon are on opposite sides of said pivot.

3. A feed device according to claim 2, wherein said spring is in the form of a resilient strand anchored to each lever on the side remote from its masking nose, a pin being clinched on the disc, said spring bearing on said pin.

4. A feed device according to claim 1, wherein the number of said ports is from 2 to 8.

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Fuel feed devices for internal combustion engines

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