CN102242683A

CN102242683A - Fuel oil return line device of diesel engine

Info

Publication number: CN102242683A
Application number: CN2011101981754A
Authority: CN
Inventors: 高志男
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-15
Filing date: 2011-07-15
Publication date: 2011-11-16

Abstract

The invention relates to a fuel oil return line device of a diesel engine, belonging to the field of supporting devices of a motor vehicle fuel oil system. An oil return general line (1) leads out two ways of connecting lines through a regulating and controlling device; the first connecting line (3) is connected with an original oil return line interface (8) of a fuel tank (7); the second connecting line (4) leads the backflow fuel oil into a fuel oil heating device (10) in the fuel tank (7) and the side of an oil outlet pipe (11) through a corresponding interface line (9); and the regulating and controlling device is a two-position three-way reversing valve (2), or two mutually individual valves which are connected through a three-way interface (14). The device is especially suitable to be matched with a fuel oil heating device of a fuel oil system, the high-temperature heat of backflow fuel oil can be utilized fully in winter, the oil supplying temperature and normal oil supplying can be ensured, the device is beneficial for energy conservation and economic benefit improvement, ensures that the fuel oil can be convenient to backflow into the fuel tank (7) through the original oil return line interface (8) besides winter, and the normal operation and the service life of the engine of the fuel oil system can be ensured; and the device has simple structure and low cost, is easy to implement, and is convenient to use.

Description

A kind of return flow oil piping installation of diesel-oil vehicle

Technical field

The invention belongs to the match equipment technical field of used in fuel oil system of motor-driven vehicle, relate to a kind of return flow oil piping installation of diesel-oil vehicle.

Background technique

With regard to diesel-oil vehicle, in the normal fuel injection system, through high pressure oil pump, high voltage rail and oil sprayer return fuel amount are bigger, the per minute capacity of reflux is about 4～5 liters under the large vehicle idling, and the temperature of return fuel is higher, be about 40～60 ℃, therefore, traditional method is, return fuel all is back in the fuel tank by the former return tube interface of fuel return pipe (FRP) on fuel tank, this economic way that is inevitable on the one hand, the aspect can also work to regulate fuel oil temperature in the fuel tank simultaneously in addition, and thermoregulatory effect is in the spring, summer, autumn is unimportant, winter in severe cold is just most important, because the interior low temperature fuel oil of fuel tank in winter can influence normal fuel injection, but traditional way has little effect to fuel oil temperature in the raising fuel tank, because for the fuel oil total amount in the bigger fuel tank, the return fuel amount is less after all, when especially car starts to start, the fuel oil that supplies can only be the original temperature of fuel oil in the fuel tank, even if normally in service, the high temperature of return fuel does not play effect substantially to the fuel oil temperature raising in the fuel tank yet, and its heat of high temperature wastes; For this reason, people have continually developed out the fuel heater of diesel car fuel oil system, thereby guarantee normal starting and operation at diesel-oil vehicle in the winter of severe cold, and for fully effectively utilizing the heat of high temperature of return fuel, improve the return flow oil pipeline, Chinese patent ZL2009201094000 discloses the short-circuiting means on a kind of diesel car fuel oil return line, return fuel can preferentially enter in the supplying pipe of fuel oil automatically, and do not enter fuel tank, its deficiency is, when in the return fuel gas being arranged, particularly under the situation of the fuel heater proper functioning of oil-fired system, very easily make in the return fuel gas-entrainedly, its short circuit oil return easily causes the gas of carrying secretly directly to be brought in the fuel delivery pipe and very fast parsing and go out to form bubble, thereby influences normal fuel injection.

Summary of the invention

The technical problem that solves:

ZL2009201094000 improves to Chinese patent, and a kind of return flow oil piping installation of diesel-oil vehicle is provided, and can overcome the deficiencies in the prior art, simultaneously simple in structure, cost is low, easily implements, easy to use, be convenient to again with oil-fired system in the supporting application of fuel heater.

The technological scheme that adopts:

A kind of return flow oil piping installation of diesel-oil vehicle, has the oil return house steward, it is characterized in that: the oil return house steward draws two-way by the valve regulating controller and takes over, one the tunnel takes over the former return tube interface of Bunker of Redelivery case, return fuel is introduced in the fuel tank, the two tunnel take over then by the corresponding interface pipe with return fuel cause fuel heater in the fuel tank and oil outlet tube near.

Beneficial effect:

Return flow oil piping installation of the present invention especially suitable with oil-fired system in the supporting application of fuel heater; In the winter time, return fuel with heat of high temperature, can by the valve regulating controller through two the tunnel take over the fuel heater that return fuel caused in the fuel tank and oil outlet tube near, because the fixed lower end position that is installed in the oil outlet tube of fuel tank of fuel heater in the described fuel tank, the fuel heater in the perhaps described fuel tank and the oil outlet tube of fuel tank are assembly integrative type structure, the lower end position of the also adjacent oil outlet tube at fuel tank of the fuel heater in the fuel tank described in this kind structure, therefore return fuel can in time be siphoned away and fuel feeding by oil outlet tube under the maintenance higher temperature, thereby avoid return fuel cool and reduce it and sneaked into impurity, and the gas that may be mingled with in the return fuel can in time fully be resolved and overflowed and sneak into the gas-phase space of fuel tank automatically by secondary by thermal change; Therefore, can fully effectively utilize the heat of high temperature of return fuel, help guaranteeing the oil temperature supplying and the normal fuel injection of oil outlet tube, help energy saving and increase economic efficiency; Beyond winter, can easily pass through the valve regulating controller, return fuel take over to be introduced in the fuel tank through one the tunnel, avoid oil temperature supplying too high, guaranteeing the life-span of normal operation of oil-fired system and motor, simple in structure, cost is low, easy enforcement, and is easy to use.

Description of drawings

Fig. 1, valve regulating controller are a two position three way directional control valve 2 formula mounting structure figure;

Fig. 2, valve regulating controller are two separate valves gate-type mounting structure figure.

Embodiment

Further explanation in detail in conjunction with the accompanying drawings; Arrow is shown the flow direction of return fuel among the figure;

As shown in fig. 1, oil return house steward 1 draws two-way by a two position three way directional control valve 2 and takes over, one the tunnel takes over the former return tube interface 8 of 3 Bunker of Redelivery casees 7, return fuel is introduced in the fuel tank, the two tunnel take over 4 by corresponding interface pipe 9 with return fuel cause fuel heater 10 in the fuel tank 7 and oil outlet tube 11 near; Two position three way directional control valve 2 is commercial, and model is that 260 right angles lead to three hole NPT3/8, Ningbo Jinbo Copper Valves Co., Ltd.'s production.

As shown in Figure 2, a three-way interface 14 is housed on the oil return house steward 1, draw one the tunnel successively respectively by a road separate valve 5 and two-way valve door 6 and take over 3 and two the tunnel and take over 4 thereafter, and successively respectively the former return tube interface 8 of Bunker of Redelivery case 7 and by mouthpiece 9 with return fuel cause fuel heater 10 in the fuel tank 7 and oil outlet tube 11 near.

As shown in fig. 1, the fuel heater 10 fixed lower end positions that are installed in the oil outlet tube 11 of fuel tank 7 in the described fuel tank 7.

For not changing former car design, one the tunnel takes over the former return tube interface 8 of 3 Bunker of Redelivery casees 7, be convenient on the one hand when two tunnel adapters 4 are safeguarded, return fuel is standby, in addition during other seasons beyond the aspect winter low temperature weather conditions, then can easily take over 3 oil returns with one the tunnel, avoid oil temperature supplying too high, normally reach the life-span of motor to guarantee oil supply system.

The valve regulating controller also can adopt automatically controlled structural system, selects the corresponding solenoid valve door for use, the circuit interlocking of the fuel heater in its motor switch and the oil-fired system.

As shown in Figure 2, fuel heater 10 in the described fuel tank 7 is an assembly integrative type structure with the oil outlet tube 11 of fuel tank 7, be meant oil outlet tube 11, fuel heater 10 and power supply leading pipe 15 thereof and oily territory limit stoper 16 by compiling flange 12 in conjunction with as a whole, can easily be on the top of fuel tank 7 flange lid 13 loading and unloading of integrity; Oil territory limit stoper 16 is meant and can surrounds certain geometric space in fuel tank 7---be oily territory, and can limit the device of the degree that the fuel oil rocking type that is in this oil territory flows back and forth, oil territory limit stoper 16 all is enclosed in oil outlet tube 11, fuel heater 10 and power supply leading pipe 15 thereof wherein, can guarantee the oil temperature supplying of oil outlet tube 11, guarantee the normal operation of whole oil-fired system; Fuel heater 10 in the fuel tank 7 in this kind structure also tightly is in the lower end position of the oil outlet tube 11 of fuel tank 7, and mouthpiece 9 (or claiming new return tube 9) also must be in the described oily territory.

Described two the tunnel take over 4 by corresponding interface pipe 9 with return fuel cause fuel heater 10 in the fuel tank 7 and oil outlet tube 11 near, purpose is that return fuel is in time siphoned away by oil outlet tube 11 under the maintenance heat of high temperature, and the lower end mouth of mouthpiece 9 (or claiming new return tube 9) should be higher than the lower end mouth of oil outlet tube 11, to guarantee that return fuel can in time parse the gas of being carried secretly automatically.

Claims

1. a kind of return flow oil piping installation of diesel-oil vehicle, has the oil return house steward, it is characterized in that: the oil return house steward draws two-way by the valve regulating controller and takes over, one the tunnel takes over the former return tube interface of Bunker of Redelivery case, return fuel is introduced in the fuel tank, the two tunnel take over then by the corresponding interface pipe with return fuel cause fuel heater in the fuel tank and oil outlet tube near.

2. a kind of return flow oil piping installation of diesel-oil vehicle according to claim 1, it is characterized in that: the structure of valve regulating controller is a two position three way directional control valve (2), or by a three-way interface (14) afterwards, connect two separate road valves (5) and two-way valve door (6).