RU-2861315-C1 - SADDLE FUEL TANK FOR VEHICLE

RU2861315C1RU 2861315 C1RU2861315 C1RU 2861315C1RU-2861315-C1

Abstract

FIELD: engine fuel systems. SUBSTANCE: fuel tank comprises active and passive half-tanks separated by a saddle, a fuel pump and at least one suction jet pump located in the active half-tank, a transfer jet pump located in the passive half-tank. The fuel tank further comprises a flow divider, the inlet of which 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 and with the inlet of the transfer 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 saddle-shaped fuel tank for a vehicle, comprising an active and a passive half-tank, separated by a saddle, a fuel pump and at least one intake jet pump, located in the active half-tank, an overflow jet pump, located in the passive half-tank, additionally comprising 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 and to 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 US patent 7066153 B2 for an invention, information about which was published on 27.06.2006 in the USA, DE patent 19750036 C2 for an invention, information about which was published on 02.09.1999 in Germany, JP patent 3820949 B2 for an invention, information about which was published on 13.09.2006 in Japan. A closer analogue is the saddle-shaped fuel tank for a vehicle, presented in application DE 19955133 A1, published on 31 May 2001 in Germany. This fuel tank contains active and passive half-tanks separated by a saddle, a fuel pump and a suction jet pump located in the active half-tank, and an overflow jet pump located in the passive half-tank. The fuel pump outlet is simultaneously connected via a pressure line to the engine and to the inlets of the suction and overflow jet pumps. When the fuel pump is operating, part of the fuel flows through the pressure line to the engine, and the rest of the fuel flows to the inlets of the suction and overflow jet pumps for pumping into the active half-tank's storage tank, regardless of fuel delivery modes 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 ensured 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 a saddle-shaped fuel tank for a vehicle, containing an active and a passive half-tank, separated by a saddle, a fuel pump 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 outlet of the fuel pump, 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. The use of a flow divider in the saddle-shaped fuel tank, with its inlet connected to the fuel pump outlet and its outlets connected to the engine and jet pump inlets, optimizes fuel flow from the intake and overflow jet pumps, preventing the excessive formation of fuel vapor and, consequently, overflow of the fuel tank and ventilation system. This prevents the accidental release of fuel vapor into the atmosphere, improving the vehicle's environmental performance. Fig. 1 shows a diagram of a saddle-shaped fuel tank for a vehicle. Fig. 2 shows a flow divider. The saddle-shaped fuel tank for a 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 a fuel pump 5 is located, controlled by an electronic unit 6, and an intake jet pump 7, pumping fuel from the active half-tank 1 into the accumulator 4. In the case where 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 8 is located, pumping fuel from the half-tank 2 into the accumulator 4. The fuel tank contains a flow divider 9, the inlet of which is connected to the outlet of the fuel pump 5. The first outlet of the flow divider 9 is connected by means of a pressure line 10 through a fuel filter 11 with the engine (not shown in the figures) and with the inlet of the safety valve 12, the outlet of which is connected to the accumulator 4. The second outlet of the flow divider 9 is connected to the inlets of the intake jet pump 7 and the overflow jet pump 8. At the outlet of the pressure line 10, a pressure sensor 13 is installed, connected to the input of the electronic unit 6. The flow divider 9 shown in Fig. 2 contains a housing 14 in which a plunger 15 and two non-adjustable throttles 16 and 17 are installed. The divider 9 also contains adjustable throttles 18 and 19, the flow sectio