RU-2861277-C1 - FUEL TANK FOR VEHICLE

RU2861277C1RU 2861277 C1RU2861277 C1RU 2861277C1RU-2861277-C1

Abstract

FIELD: engine fuel systems. SUBSTANCE: fuel tank comprises a fuel pump, at least one suction jet pump, further comprises a flow divider. The inlet of the flow divider is in communication with the outlet of the fuel pump. A first outlet of the flow divider is in communication with the engine, and its second outlet is in communication with the inlet of the at least one suction jet pump. EFFECT: increasing the environmental friendliness of the vehicle. 1 cl, 2 dwg

Inventors

TER-MKRTICHYAN GEORG GEORGOVICH
SAJKIN ANDREJ MIKHAJLOVICH
Terenchenko Aleksej Stanislavovich
Glaviznin Vladimir Vladimirovich
Mikerin Nikita Alekseevich
Arabyan Marina Erdzhanikovna
Polikarpov Viktor Vasilevich
Tsejtlin Aleksej Aleksandrovich
Razhev Daniil Sergeevich

Dates

Publication Date: 20260504
Application Date: 20251101

Claims (1)

A fuel tank for a vehicle containing a fuel pump, at least one intake jet pump, further contains a flow divider, the inlet of which is connected to the outlet of the fuel pump, the first outlet of the flow divider is connected to the engine, the second outlet of the flow divider is connected to the inlet of at least one intake jet pump.

Description

The technical solution relates to transport engineering, specifically engine fuel systems. It concerns a fuel tank with a submersible fuel pump. When the engine is running, so-called dynamic fuel evaporation occurs. Sources of this evaporation include, among other things, the fuel streams flowing into the tank from the jet pumps. The magnitude of the dynamic component of evaporation is determined by the intensity of mixing and spraying during the operation of the jet pumps. Various designs of fuel tanks for automobiles are known from the prior art, shown, for example, in the application DE 4224981 A1 for an invention, information about which was published on 03.02.1994 in Germany, patent US 6293256 B1 for an invention, information about which was published on 25.09.2001 in the USA, application DE 19961923 A1 for an invention, information about which was published on 05.07.2001 in Germany. A more closely related example is the automotive fuel tank described in US Patent Application No. 2004173188 A1, published in the United States on September 9, 2004. This fuel tank contains a fuel pump and a suction jet pump located in the storage tank. The fuel pump outlet communicates simultaneously through a pressure line with the engine and with the suction jet pump inlet. Thus, when the fuel pump is operating, some fuel flows through the pressure line to the engine, while the remaining fuel enters the suction jet pump inlet for pumping from the tank to the storage tank, regardless of fuel delivery conditions to the engine. This results in high fuel consumption due to draining from the suction jet pump, causing intense fuel vapor formation. This can lead to overflow of the fuel tank and ventilation system, resulting in an emergency release of fuel vapor into the atmosphere. The technical problem, the solution of which is ensured by the implementation of the invention, consists in ensuring control of the performance of the suction jet pump, which will optimize its operation. The technical result achieved by the invention is to improve the environmental friendliness of the vehicle. The solution to the specified technical problem and the obtaining of the technical result is ensured by the fact that the fuel tank for a vehicle, containing a fuel pump, at least one intake jet pump, additionally contains a flow divider, the inlet of which is connected to the outlet of the fuel pump, the first outlet of the flow divider is connected to the engine, the second outlet of the flow divider is connected to the inlet of at least one intake jet pump. By using a flow divider in the fuel tank, whose inlet communicates with the fuel pump outlet, and whose outlets communicate with the engine and the inlet of at least one suction jet pump, fuel flow from the suction jet pump is optimized, preventing the intensive formation of fuel vapors and, consequently, overflow of the fuel tank and ventilation system. This prevents the accidental release of fuel vapors into the atmosphere, improving the vehicle's environmental performance. Fig. 1 shows a diagram of a fuel tank for a car. Fig. 2 shows a flow divider. The fuel tank for a vehicle shown in Fig. 1 comprises a fuel pump 1 controlled by an electronic unit 2, and a suction jet pump 3 located in an accumulator 4. In the event that the capacity of one suction jet pump is insufficient to maintain the required fuel level in the accumulator, two or more suction jet pumps may be installed. The fuel tank comprises a flow divider 5, the inlet of which is connected to the outlet of the fuel pump 1. The first outlet of the flow divider 5 is connected by means of a pressure line 6 through a fuel filter 7 to the engine (not shown in the figures) and to the inlet of a safety valve 8, the outlet of which is connected to the accumulator 4. The second outlet of the flow divider 5 is connected to the inlet of the suction jet pump 3. A pressure sensor 9 is installed at the outlet of the pressure line 6, connected to the input of the electronic unit 2. The flow divider 5 shown in Fig. 2 contains a housing 10 in which a plunger 11 and two non-adjustable throttles 12 and 13 are installed. The divider 5 also contains adjustable throttles 14 and 15, the flow sections of which can be changed by moving the plunger 11. Between the end walls of the housing 10 and the plunger 11, chambers 16 and 17 are formed. The divider 5 has an inlet 18 connected to the outlet of the fuel pump 1, an outlet 19 connected to the engine via a pressure line, and an outlet 20 connected to the inlet of the intake jet pump. During engine operation (see Fig. 1), fuel pump 1 is controlled by means of electronic unit 2 depending on signals received from pressure sensor 9 at the outlet of pressure line 6, thereby ensuring optimal fuel pressure at the inlet to the engine. Fuel is supplied by pump 1 to the inlet of flow divider 5, where it is distributed into two streams in proportions determined by the cross-sectional dimensions of non-adjustable