DD289094A5 - DEVICE FOR CONTROLLING THE FUEL-AIR CONDITIONING FLEXIBLE FOR A CARBURETTOR FOR MIXTURE COMPRESSIVE INTERNAL COMBUSTION ENGINES - Google Patents

Abstract

The invention includes a device for controlling the fuel-air ratio at full throttle for a carburetor for mixture-compressing internal combustion engines. The invention relates to a controlled Vollastanreicherungssystem of a carburetor for mixture-compressing internal combustion engines. The invention is characterized in that in a conventional full-load enrichment system in the enrichment channel, a throttle body is arranged, which is controllable in dependence on the throttle position. Fig. 1 {internal combustion engine; Carburettor, controlled; Vollastnaehe; Air-fuel ratio; Vollastanreicherungssystem; Enrichment channel; Throttle body; Throttle position}

Description

Shut-off device 2 installed, in the special case a solenoid valve. This obturator is jispiel by a Limit switch 3 is actuated, which closes the circuit to the solenoid valve with fully open throttle (full load), which

for releasing the enrichment channel and thus introducing the required additional fuel quantity leads.

The control of Vollastanreicherung can still be realized purely by mechanical means by a corresponding Coupling of shut-off or throttle body is made with the throttle valve of the carburetor. Furthermore, that can Set control signal from an engine control system, which the throttle position as Input information uses. In addition to the "open-close" behavior of the obturator still a steady adjustment is possible.

Claims (1)

Device for controlling the fuel-air ratio near full load for a carburetor for Gemischverdichtende internal combustion engines with at least one Hauptggasersystem, and idle, cold start ·, Warmlau-, acceleration and / or Vollastanreicherungssystem, characterized in that in a conventional Vollastanreicherungssystem in Enreicherunpskanal a Throttle member is arranged, which is controllable in dependence on the throttle position. For this 1 page drawing Field of application of the invention The invention relates to a controlled Vollastanreicherungssystem of a carburetor for mixture-compressing internal combustion engines. Characteristic of the known state of the art It is known from DE-OS 2801409 a device for influencing the fuel-Luft-Behhältnlsses an internal combustion engine. This solution is characterized by a, with the help of pumping devices or valves changing pressures generating channel that affects the pressure in the float chamber. By generating an increased pressure in the float chamber by means of a pumping device enrichment of the fuel-air mixture is achieved. This solution is based on a per se optimally tuned main carburetor, so that according to existing operating conditions of the internal combustion engine, both an enrichment and a leaning of the air-fuel ratio is necessary. The realization of this solution is associated with high design complexity, in particular through the use of additional pumping devices. Another disadvantage is that in case of failure of the system results in a lean operation of the internal combustion engine, which leads to insufficient operating procedures. Another solution is known from DE-OS 2721774. Here, the funnel (Venturi) pressure is used to influence the air-fuel ratio. This variant is characterized by a branching off from the air funnel of the main carburetor channel, which is guided on a diaphragm can. With the help of this device, an enrichment valve is controlled, which causes an enrichment of the air-fuel ratio. The disadvantage of this solution is that here an enrichment of the lean set mixture is made, resulting in failure of the device, an insufficient performance. Object of the invention The aim of the invention is to provide a device for influencing or regulating the mixture composition for carburetor internal combustion engines without having to provide a design for separate bypass ducts for correction air quantities. Furthermore, to be increased with the proposed solution features and security. Essence of the invention The object of the invention is to provide for a carburetor internal combustion engine, a device for influencing the mixture composition along the full load, which is based constructively on the solutions of existing systems. Therefore, the present invention seeks to solve the problem that sit in a conventional Vollastanreicherungssystem in the enrichment channel a throttle body sit, which is controlled in dependence on the throttle position. The full load enrichment can be switched on or off accordingly. The regulation of the full-load enrichment quantity can be effected by a device with "open-close" characteristic or continuously.The specification of the actuating signal can be taken directly from the throttle valve in a manner known per se (eg slide disc or the like) or by a corresponding control system can be specified, the throttle valve position being evaluated here as well, a limit switch or the like is also conceivable. Actuation of the control device can be effected either electrically (eg solenoid valve) or mechanically (eg throttle element). embodiment The invention will be explained in more detail by an embodiment. It shows Fig. 1: inventive device. FIG. 1 shows the change to the carburetor required for realizing the described function. It is based on a conventional carburetor for a mixture-compression internal combustion engine with the corresponding Vollastsystem. Contrary to the usual embodiment of the full load enrichment system is in the enrichment channel 1 a