CN100344868C - Fuel high pressure generator for oil supply system with direct jetting of liquefied petroleum gas/petrol in cylinder - Google Patents
Fuel high pressure generator for oil supply system with direct jetting of liquefied petroleum gas/petrol in cylinder Download PDFInfo
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- CN100344868C CN100344868C CNB2004100670033A CN200410067003A CN100344868C CN 100344868 C CN100344868 C CN 100344868C CN B2004100670033 A CNB2004100670033 A CN B2004100670033A CN 200410067003 A CN200410067003 A CN 200410067003A CN 100344868 C CN100344868 C CN 100344868C
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Abstract
The present invention discloses a fuel high pressure generating device for a direct injection oil supply system in a liquefied petroleum gas/gasoline cylinder, which is provided with a fuel tank, a fuel filter and a fuel delivery pump, wherein the fuel delivery pump is connected in series with a first one-way valve, a second one-way valve, a pressure sensor, a third one-way valve and a fourth one-way valve sequentially. The connecting point of the first one-way valve and the second one-way valve is connected to the upper end of a cylinder A of a fuel pressure increase device; the connecting point of the third one-way valve and the fourth one-way valve is connected with the upper end of a cylinder B of the fuel pressure increase device. A cavity a2 of the cylinder A of the fuel pressure increase device is provided with a position sensor of a fuel compression cylinder, and a cavity b2 of the cylinder B of the fuel pressure increase device is provided with a position sensor of a fuel compression cylinder. The present invention has the advantages that high pressure increase of fuel is easy to realize, a high-speed moving part does not exist, and the reliability is improved; the present invention is suitable for the pressure increase of different liquid fuel and gas fuel; with adopting two fuel compression cylinders to work alternately, the stability of oil injection pressure can be ensured, so a pressure accumulation device is not needed.
Description
Technical field
The present invention relates to the fuel high pressure generating apparatus of a kind of liquefied petroleum gas (LPG)/gasoline in-cylinder direct injection oil supply system.
Background technique
Engine cylinder inner direct technology more and more is applied on all kinds of medium-to-high grade cars, and it has become a main direction of automotive engineering development from now on.And fuel high pressure generating apparatus is the key component in the engine cylinder inner direct fuel supply system, the general employing by motor drive plunger oil pump of traditional cylinder inside direct jet type engine Pressure generator presses the mode of oil to produce high pressure fuel, adopt this high pressure generating apparatus to have many shortcomings: because the employing of the plunger coupling part in the plunger oil pump is that highi degree of accuracy cooperates, and they are in high-speed motion state plunger oil pump when work, this just requires good the lubricating to prevent component wear of asking of plunger coupling part, but for using gasoline, the engine cylinder inner direct system of this class A fuel A of liquefied petroleum gas (LPG), because gasoline, particularly to have viscosity low for LP gas fuel, the characteristics of poor lubricity, if adopt traditional cylinder inside direct jet type engine Pressure generator, will certainly bring parts to wear and tear fast and cause the serious consequence of failure of apparatus, What is more, because the corrosive action of some fuel, can be when adopting the plunger pump supercharging because the corrosion of fuel reduces the quality of fit of plunger coupling part, thereby make traditional cylinder inside direct jet type engine Pressure generator produce the supercharging difficulty, problems such as poor sealing performance have a strong impact on the reliability that system uses.
Summary of the invention
The fuel high pressure generating apparatus that the purpose of this invention is to provide a kind of liquefied petroleum gas (LPG)/gasoline in-cylinder direct injection oil supply system.
It has fuel transfer pump, is serially connected with first one-way valve, second one-way valve, pressure transducer, the 3rd one-way valve, the 4th one-way valve successively on fuel transfer pump, the tie point of first one-way valve and second one-way valve and fuel pressure supercharging device first cylinder upper end join, and the tie point of the 3rd one-way valve and the 4th one-way valve and fuel pressure supercharging device second cylinder upper end join; Fuel compression cylinder position sensor is housed in the a2 chamber of fuel pressure supercharging device first cylinder, fuel compression cylinder position sensor is housed in the b2 chamber of fuel pressure supercharging device second cylinder.
Advantage of the present invention:
1) realizes the high pressure supercharging of fuel easily;
2) no high-speed moving part has improved system reliability;
3) low viscosity, the low sealing problem that lubricates fuel have been solved;
4) supercharging of multiple liquid of adaptation and gaseous fuel;
5) adopt the alternation of two fuel compression cylinders, can guarantee that injection pressure is stable, so do not need pressure accumulater.
Description of drawings
Fig. 1 is the fuel high pressure generating apparatus schematic representation of LPG/ petrol engine inner cylinder direct injection;
Fig. 2 is fuel pressurizing device A cylinder structure schematic representation (the B cylinder is identical with the A cylinder structure).
Embodiment
As shown in Figure 1, the fuel high pressure generating apparatus of LPG (liquefied petroleum gas (LPG))/petrol engine inner cylinder direct injection oil supply system, fuel filter 9, fuel transfer pump 5, on fuel transfer pump 5, be serially connected with first one-way valve 2, second one-way valve 1, pressure transducer 8, the 3rd one-way valve 4, the 4th one-way valve 3 successively, the tie point of first one-way valve 2 and second one-way valve 1 and a1 chamber, fuel pressure supercharging device first cylinder A upper end join, and the tie point of the 3rd one-way valve 4 and the 4th one-way valve 3 and b1 chamber, fuel pressure supercharging device second cylinder B upper end join; Fuel compression cylinder position sensor 6 is housed in the a2 chamber of the fuel pressure supercharging device first cylinder A, fuel compression cylinder position sensor 7 is housed in the b2 chamber of the fuel pressure supercharging device second cylinder B.The fuel pressure supercharging device second cylinder B is identical with the fuel pressure supercharging device first cylinder A.
As shown in Figure 2, have successively on fuel pressure supercharging device first cylinder (A) fuel compression cylinder sleeve A-1, fluid dynamic cylinder sleeve flange A-9, fluid dynamic cylinder sleeve A-12, in fuel compression cylinder sleeve A-1, be provided with fuel compression piston A-2, be provided with piston rod A-4 on the fuel compression piston A-2 and fix with locking nut A-5, fuel compresses between cylinder sleeve A-1 and fuel compression piston A-2 and is provided with sealed piston ring A-3; In fluid dynamic cylinder sleeve A-12, be provided with fluid dynamic piston A-13, be provided with piston rod A-4 on the fluid dynamic piston A-13 and fixing with locking nut A-14, be provided with sealed piston ring A-11 between fluid dynamic piston A-13 and the fluid dynamic cylinder sleeve A-12; Between fuel compression cylinder sleeve A-1 and fluid dynamic cylinder sleeve flange A-9, be provided with seal ring A-7, be provided with seal ring A-10 at fluid dynamic cylinder sleeve flange A-9 and between fluid dynamic cylinder sleeve A-12; Fuel compression cylinder sleeve A-1, fluid dynamic cylinder sleeve flange A-9 and fluid dynamic cylinder sleeve A-12 link together by clamping bolt A-6.On fuel compression cylinder sleeve A-1, have a fuel manhole appendix A-15 who links to each other with first cylinder A upper end, the first chamber a1 and collect hole A-16, on fluid dynamic cylinder sleeve A-12, have a ram fluid passing hole A-17 who links to each other with first cylinder A upper end, the first chamber a3 and a ram fluid passing hole A-18 who links to each other with first cylinder A upper end, the second chamber a4 with a fuel losses that links to each other with first cylinder A upper end, the second chamber a2.
When the present invention works:
Working fluid enters the a4 chamber by the ram fluid passing hole A-18 on the fluid dynamic cylinder sleeve A-12 of fuel pressurizing device A cylinder, working fluid in the a3 chamber flows out by the ram fluid passing hole A-17 on the fluid dynamic cylinder sleeve A-12 simultaneously, pressure difference between a4 chamber and a3 chamber makes fluid dynamic piston A-12 move towards the direction in fuel compression cylinder a1 chamber, drives piston rod A-4 that is fixed together with fluid dynamic piston A-12 and the fuel compression piston A-2 that is fixed on the piston rod A-4 simultaneously and moves towards same direction.Original fuel is compressed in the interior a1 chamber of fuel compression this moment cylinder sleeve A-1, reaches predefined fuel pressure (0.5～100MPa).These fuel under high pressure that form in a1 chamber in fuel compression cylinder sleeve A-1 are then supplied with the oil nozzle that is connected on outlet O place through second one-way valve 1.
When fuel pressurizing device A cylinder begins to supply fuel oil, the fuel compression piston B-2 of fuel pressurizing device B cylinder walks to the stroke end, fuel compression cylinder position sensor 7 sends signal to controller, under the control of controller, working fluid enters the b3 chamber by the ram fluid passing hole B-17 on the fluid dynamic cylinder sleeve B-12 of fuel pressurizing device B cylinder, flow out by the ram fluid passing hole B-18 on the fluid dynamic cylinder sleeve B-12 with the working fluid in the b4 chamber, pressure difference between b3 chamber and b4 chamber makes fluid dynamic piston B-12 move towards the direction in fuel compression cylinder b2 chamber, drives the piston rod B-4 that is fixed together with fluid dynamic piston B-12 simultaneously, and the fuel compression piston B-2 that is fixed on the piston rod B-4 moves towards same direction.The fuel that fuel pot this moment (case) is come through fuel filter 9 and fuel transfer pump 5 elementary superchargings after, enter b1 chamber in the fuel compression cylinder sleeve B-1 by the 4th one-way valve 3.
At this moment, fuel pressurizing device A cylinder is still at the supply fuel oil, and the fluid dynamic piston B-12 of fuel pressurizing device B cylinder is near the stroke end, fuel compression cylinder position sensor 7 sends signal, control by controller, working fluid enters the b4 chamber by the ram fluid passing hole B-18 on the fluid dynamic cylinder sleeve B-12 of fuel pressurizing device B cylinder, working fluid in the b3 chamber flows out by the ram fluid passing hole B-17 on the fluid dynamic cylinder sleeve B-12 simultaneously, pressure difference between b4 chamber and b3 chamber makes fluid dynamic piston B-12 move towards the direction in fuel compression cylinder b1 chamber, drives the piston rod B-4 that is fixed together with fluid dynamic piston B-12 simultaneously, and the fuel compression piston B-2 that is fixed on the piston rod B-4 moves towards same direction.Original fuel is compressed in the interior b1 chamber of fuel compression this moment cylinder sleeve B-1, reaches predefined fuel pressure (0.5～100MPa).These fuel under high pressure that form in b1 chamber in fuel compression cylinder sleeve B-1 are then supplied with the oil nozzle that is connected on outlet O place through the 3rd one-way valve 4.
When fuel pressurizing device B cylinder begins to supply fuel oil, the fuel compression piston A-2 of fuel pressurizing device A cylinder walks to the stroke end, fuel compression cylinder position sensor 6 sends signal to controller, under the control of controller, working fluid enters the a3 chamber by the ram fluid passing hole A-17 on the fluid dynamic cylinder sleeve A-12 of fuel pressurizing device B cylinder, flow out by the ram fluid passing hole A-18 on the fluid dynamic cylinder sleeve A-12 with the working fluid in the a4 chamber, pressure difference between a3 chamber and a4 chamber makes fluid dynamic piston A-12 move towards the direction in fuel compression cylinder a2 chamber, drives the piston rod A-4 that is fixed together with fluid dynamic piston A-12 simultaneously, and the fuel compression piston A-2 that is fixed on the piston rod A-4 moves towards same direction.The fuel that fuel pot this moment (case) is come through fuel filter 9 and fuel transfer pump 5 elementary superchargings after, enter a1 chamber in the fuel compression cylinder sleeve A-1 by first one-way valve 2.
At the fluid dynamic piston A-12 of fuel pressurizing device A cylinder near the stroke end, fuel compression cylinder position sensor 6 sends signal to controller, under the control of controller, the fuel pressure supercharging device will repeat the process in the 1st step, and the fuel in fuel compression cylinder sleeve A-1 in the a1 chamber is compressed the formation fuel under high pressure.The periodic duty that goes round and begins again thus just can form the stable high voltage fuel supply and be connected on the oil nozzle at outlet O place.
At fuel compression cylinder A, B, when the fuel under high pressure among one of them fuel compression cylinder A did not also use up, the fuel among another fuel compression cylinder B had been compressed to required pressure, prepared fuel supplying.At this moment fuel compression piston A-2 walks to the stroke end in fuel compression cylinder A, and beginning is by fuel compression cylinder B supply fuel oil.And the fuel under high pressure in fuel compression cylinder B is not when also using up, and the fuel among the fuel compression cylinder A has been compressed to required pressure, prepares fuel supplying.So go round and begin again, it is stable that the fuel pressure in the oil circuit can keep, and avoided the pressure surge of fuel oil, so this device need not pressure accumulater, can guarantee that the fuel under high pressure pressure of whole device output remains unchanged.
The effect of pressure transducer 8 is pressure informations of collecting in the high-pressure oil passage, feeds back to controller, and controls the action of ram based on this.The effect that hole A-16 is collected in the fuel leak of joining with the a2 chamber on fuel compression cylinder sleeve A-1 is when fuel compresses, and will compress the fuel that leaks out between cylinder sleeve A-1 and fuel compression piston A-2 by fuel and collect and send fuel pot (case) back to; The effect that hole B-16 is collected in the fuel leak of joining with the b2 chamber on fuel compression cylinder sleeve B-1 is when fuel compresses, and will compress the fuel that leaks out between cylinder sleeve B-1 and fuel compression piston B-2 by fuel and collect and send fuel pot (case) back to.
Claims (3)
1. the fuel high pressure generating apparatus of liquefied petroleum gas (LPG)/gasoline in-cylinder direct injection oil supply system, it is characterized in that: it has fuel transfer pump (5), on fuel transfer pump (5), be serially connected with first one-way valve (2) successively, second one-way valve (1), pressure transducer (8), the 3rd one-way valve (4), the 4th one-way valve (3), first one-way valve (2) joins with tie point and (a1) chamber, fuel pressure supercharging device first cylinder (A) upper end of second one-way valve (1), and the 3rd one-way valve (4) joins with tie point and (b1) chamber, fuel pressure supercharging device second cylinder (B) upper end of the 4th one-way valve (3); Fuel compression cylinder position sensor (6) is housed in (a2) chamber of fuel pressure supercharging device first cylinder (A), fuel compression cylinder position sensor (7) is housed in (b2) chamber of fuel pressure supercharging device second cylinder (B).
2. the fuel high pressure generating apparatus of a kind of liquefied petroleum gas (LPG) according to claim 1/gasoline in-cylinder direct injection oil supply system is characterized in that: said fuel pressure supercharging device second cylinder (B) is identical with fuel pressure supercharging device first cylinder (A).
3. the fuel high pressure generating apparatus of a kind of liquefied petroleum gas (LPG) according to claim 1 and 2/gasoline in-cylinder direct injection oil supply system is characterized in that: have fuel compression cylinder sleeve (A-1) on said fuel pressure supercharging device first cylinder (A) successively, fluid dynamic cylinder sleeve flange (A-9), fluid dynamic cylinder sleeve (A-12), in fuel compression cylinder sleeve (A-1), be provided with fuel compression piston (A-2), on fuel compression piston (A-2), be provided with piston rod (A-4) and fixing with locking nut (A-5), be provided with sealed piston ring (A-3) between fuel compression cylinder sleeve (A-1) and fuel compression piston (A-2); In fluid dynamic cylinder sleeve (A-12), be provided with fluid dynamic piston (A-13), be provided with piston rod (A-4) on the fluid dynamic piston (A-13) and fixing with locking nut (A-14), be provided with sealed piston ring (A-11) between fluid dynamic piston (A-13) and the fluid dynamic cylinder sleeve (A-12); Between fuel compression cylinder sleeve (A-1) and fluid dynamic cylinder sleeve flange (A-9), be provided with seal ring (A-7), be provided with seal ring (A-10) at fluid dynamic cylinder sleeve flange (A-9) and between fluid dynamic cylinder sleeve (A-12); Fuel compression cylinder sleeve (A-1), fluid dynamic cylinder sleeve flange (A-9) link together by clamping bolt (A-6) with fluid dynamic cylinder sleeve (A-12); On fuel compression cylinder sleeve (A-1), have a fuel manhole appendix (A-15) that links to each other with first cylinder (A), first chamber, upper end (a1) and collect hole (A-16), on fluid dynamic cylinder sleeve (A-12), have a ram fluid passing hole (A-17) that links to each other with first cylinder (A), first chamber, upper end (a3) and a ram fluid passing hole (A-18) that links to each other with first cylinder (A), second chamber, upper end (a4) with a fuel losses that links to each other with first cylinder (A), second chamber, upper end (a2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100670033A CN100344868C (en) | 2004-09-30 | 2004-09-30 | Fuel high pressure generator for oil supply system with direct jetting of liquefied petroleum gas/petrol in cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100670033A CN100344868C (en) | 2004-09-30 | 2004-09-30 | Fuel high pressure generator for oil supply system with direct jetting of liquefied petroleum gas/petrol in cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1616812A CN1616812A (en) | 2005-05-18 |
| CN100344868C true CN100344868C (en) | 2007-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100670033A Expired - Fee Related CN100344868C (en) | 2004-09-30 | 2004-09-30 | Fuel high pressure generator for oil supply system with direct jetting of liquefied petroleum gas/petrol in cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN100344868C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5195487A (en) * | 1990-12-10 | 1993-03-23 | Man Nutzfahrzeuge Aktiengesellschaft | Fuel injection system for air-compressing internal combustion engines |
| US5529042A (en) * | 1994-03-04 | 1996-06-25 | Mercedes-Benz A.G. | Fuel injection system for an internal combustion engine |
| US5878718A (en) * | 1995-05-26 | 1999-03-09 | Robert Bosch Gmbh | Fuel supply and method for operating an internal combustion engine |
| US5992373A (en) * | 1996-10-31 | 1999-11-30 | Unisia Jecs Corporation | Apparatus and method for controlling fuel injection of direct injection gasoline internal combustion engine |
| CN1455845A (en) * | 2000-11-09 | 2003-11-12 | 洋马株式会社 | Accumulator distribution type fuel injection pump |
-
2004
- 2004-09-30 CN CNB2004100670033A patent/CN100344868C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5195487A (en) * | 1990-12-10 | 1993-03-23 | Man Nutzfahrzeuge Aktiengesellschaft | Fuel injection system for air-compressing internal combustion engines |
| US5529042A (en) * | 1994-03-04 | 1996-06-25 | Mercedes-Benz A.G. | Fuel injection system for an internal combustion engine |
| US5878718A (en) * | 1995-05-26 | 1999-03-09 | Robert Bosch Gmbh | Fuel supply and method for operating an internal combustion engine |
| US5992373A (en) * | 1996-10-31 | 1999-11-30 | Unisia Jecs Corporation | Apparatus and method for controlling fuel injection of direct injection gasoline internal combustion engine |
| CN1455845A (en) * | 2000-11-09 | 2003-11-12 | 洋马株式会社 | Accumulator distribution type fuel injection pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1616812A (en) | 2005-05-18 |
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Granted publication date: 20071024 Termination date: 20100930 |