RU-2861482-C1 - FUEL TANK OF VEHICLE

RU2861482C1RU 2861482 C1RU2861482 C1RU 2861482C1RU-2861482-C1

Abstract

FIELD: engine fuel systems. SUBSTANCE: fuel tank comprises an active and a passive half-tank separated by a saddle, fuel pumps connected to each other, and at least one suction jet pump located in the active half-tank, and a transfer jet pump located in the passive half-tank. The fuel tank further comprises a flow divider, the inlet of which is connected to the outlets of the fuel pumps. The first outlet of the flow divider is connected to the engine, and its second outlet is connected to the inlet of the at least one suction jet pump and to the inlet of the transfer jet pump. EFFECT: increased 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: 20260505
Application Date: 20251101

Claims (1)

A fuel tank of a vehicle comprising an active and a passive half-tank separated by a saddle, fuel pumps communicated with each other, and at least one intake jet pump located in the active half-tank, an overflow jet pump located in the passive half-tank, characterized in that it additionally comprises a flow divider, the inlet of which is communicated with the outlets of the fuel pumps, the first outlet of the flow divider is communicated with the engine, the second outlet of the flow divider is communicated with the inlet of at least one intake jet pump and with the inlet of the overflow jet pump.

Description

The technical solution relates to transport engineering, specifically engine fuel systems. It concerns a fuel tank with an internal saddle dividing it into two half-tanks. During engine operation, so-called dynamic fuel evaporation occurs in the fuel tank. Sources of this evaporation include, among other things, the fuel flowing into the tank from the intake and overflow jet pumps. The magnitude of the dynamic component of evaporation is determined by the intensity of mixing and spraying during operation of the jet pumps. Various designs of saddle-shaped fuel tanks for vehicles are known from the prior art, shown, for example, in patent RU2633090C1 for an invention, information about which was published on 11.10.2017 in the Russian Federation, patent US6907899B2 for an invention, information about which was published on 21.06.2005 in the USA, patent US7500473B2 for an invention, information about which was published on 10.03.2009 in the USA. The vehicle fuel tank described in application DE10335698A1, published in Germany on February 24, 2005, was adopted as a prototype. It comprises active and passive half-tanks separated by a saddle, fuel pumps, and a suction jet pump housed in a storage tank located in the active half-tank, with an overflow jet pump housed in the passive half-tank. The outputs of both fuel pumps are simultaneously connected via a pressure line to the engine and to the inputs of the suction and overflow jet pumps. Thus, when one fuel pump or both fuel pumps are operating simultaneously, part of the fuel flows through the pressure line to the engine, while the remaining fuel flows to the inputs of the suction and overflow jet pumps for pumping back into the storage tank of the active half-tank, regardless of the fuel delivery mode to the engine. This leads to high fuel consumption due to draining from the intake and overflow jet pumps, 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 provided by the implementation of the invention, consists in ensuring control of the performance of jet pumps, which will optimize their operation. The technical result achieved by the invention consists in increasing the environmental friendliness of the vehicle. The solution to the specified technical problem and obtaining the technical result is ensured by the fact that the fuel tank of the vehicle, containing an active and a passive half-tank, separated by a saddle, fuel pumps, communicated with each other, and at least one intake jet pump, located in the active half-tank, an overflow jet pump, located in the passive half-tank, additionally contains a flow divider, the inlet of which is communicated with the outlets of the fuel pumps, the first outlet of the flow divider is communicated with the engine, the second outlet of the flow divider is communicated with the inlet of at least one intake jet pump and with the inlet of the overflow jet pump. By using a flow divider in the fuel tank, the input of which is connected to the outputs of the fuel pumps, and its outputs to the engine and the inputs of the jet pumps, the fuel consumption for draining from the intake and overflow jet pumps is optimized, which prevents the intensive formation of fuel vapors and, accordingly, the overflow of the fuel tank and ventilation system. This prevents the emergency release of fuel vapors into the atmosphere, which improves the environmental friendliness of the vehicle. Fig. 1 shows a diagram of a vehicle's fuel tank. Fig. 2 shows a flow divider. The fuel tank of the vehicle shown in Fig. 1 comprises an active half-tank 1 and a passive half-tank 2, separated by a saddle 3. In the active half-tank 1 there is an accumulator 4, in which the first and second fuel pumps 5 and 6, controlled by an electronic unit 7, and an intake jet pump 8, which pumps fuel from the active half-tank 1 into the accumulator 4, are placed in communication with each other. In the event that the capacity of one intake jet pump is insufficient to maintain the required fuel level in the accumulator, two or more intake jet pumps can be installed. In the passive half-tank 2, an overflow jet pump 9 is located, pumping fuel from the half-tank 2 into the accumulator 4. The fuel tank contains a flow divider 10, the inlet of which is connected to the outlets of the fuel pumps 5 and 6. The first outlet of the flow divider 10 is connected by means of a pressure line 11 through a fuel filter 12 with the engine (not shown in the figures) and with the inlet of the safety valve 13, the outlet of which is connected to the accumulator 4. The second outlet of the flow divider 10 is connected to the inlets of the intake jet pump 8 and the overflow jet pump 9. At the outlet of the pressure line 11, a pressure sensor 14 is installed, connected to the input of the electronic unit 7. The flow divider 1