CN103089464A - Fuel supply system - Google Patents
Fuel supply system Download PDFInfo
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- CN103089464A CN103089464A CN2012101746142A CN201210174614A CN103089464A CN 103089464 A CN103089464 A CN 103089464A CN 2012101746142 A CN2012101746142 A CN 2012101746142A CN 201210174614 A CN201210174614 A CN 201210174614A CN 103089464 A CN103089464 A CN 103089464A
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- China
- Prior art keywords
- fuel
- supplying device
- described fuel
- fuel supply
- fuel supplying
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
A fuel supply system of an internal combustion engine is provided. The fuel supply system controls a discharge flow of the fuel supply system during control of non-injection and the minimum injection of a fuel injection apparatus, so as to control a passing flow of a pressure regulating device. The fuel supply system (10) comprises a fuel tank (1) for accommodating fuel; a fuel supply apparatus (2) driven by a brushless motor (6); a filtering device (4) arranged between the fuel tank (1) and the fuel supply apparatus (2); the pressure regulating device (8) arranged in the fuel supply apparatus (2) or adjacent to the fuel supply apparatus (2); the fuel injection apparatus (3) for injecting the fuel pressurized by the fuel supply apparatus (2); and a control unit for controlling on-off time points of the fuel injection apparatus (3) and motor rotational speed of the fuel supply apparatus (2), and controlling the flow passing the pressure regulating device (8) by controlling the discharge flow of the fuel supply apparatus (2).
Description
Technical field
The present invention relates to a kind ofly such as utilizing the pressure regulator of fuel supplying device fuel pressure to be controlled to be the fuel supply system of desired value in Incylinder direct injection internal-combustion engine etc., relate in particular to the bad fuel supply system of action that a kind of valve section that can prevent from snapping in pressure regulator because of foreign matter etc. causes.
Background technique
Generally speaking, in such as the Incylinder direct injection internal-combustion engine in the cylinder with direct injections such as gasoline, owing to requiring high fuel pressure, therefore, adopt following fuel supply system in more situation: use the mechanical high pressure fuel pump of being exported by internal-combustion engine and driving, and namely discharge the variable pressure regulated device that side arranges the electronic control type in its high pressure side, make the part in the fuel of discharge leak into low voltage side, thereby be adjusted to target fuel pressure.
As this fuel supply system, at present, for example known have Japanese Patent Laid-Open 2000-45839 communique (patent documentation 1) record like that, for prevent because of foreign matter snap in or the powder that weares and teares to be attached to the action that causes between the spool of pressure regulator and valve seat bad, foreign matter attachment state according to the valve section of pressure regulator, in failure of fuel process when slowing down, utilize Duty ratio control that the valve section opening/closing time of pressure regulator is changed, thereby except the foreign matter of attachment removal.
In addition, for example known have No. 3612175 communique of Japanese Patent Laid (patent documentation 2) record like that, carry out the feedback control of fuel pressure, in the situation that it is abnormal fuel pressure to be detected, sneak into fuel supply system and unify the foreign matter of piping system as purpose to remove, spray under controlled conditions in comprising without the minimum in being injected in of fuel injection system, utilize Duty ratio control that the valve section of pressure regulator is all opened, sneak into the unify foreign matter of piping system of fuel supply system thereby remove.
And, for example known have No. 3663870 communique of Japanese Patent Laid (patent documentation 3) record like that, in the situation in the range of pressure values that has broken away from regulation according to any and predefined feed fuels force value in rotating speed, air amount amount and the engine temperature of internal-combustion engine, when vehicle deceleration or during failure of fuel, utilize Duty ratio control that the opening/closing time of the valve section of pressure regulator is changed, thereby remove foreign matter.
The prior art document
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2000-45839 communique
Patent documentation 2: No. 3612175 communique of Japanese Patent Laid
Patent documentation 3: No. 3663870 communique of Japanese Patent Laid
Prior art according to above-mentioned each patent documentation record, in the situation that fuel pressure occurs in valve section that snaps in pressure regulator because of foreign matter etc. is abnormal, or Fuelinjection nozzle without spraying and minimum the injection when controlling, utilize Duty ratio control that the valve section opening/closing time of pressure regulator is changed.But, in the case, because the lift amount that only periodically makes within a certain period of time valve section becomes maximum, therefore, might can't remove foreign matter.In addition, although can make the lift amount of valve section keep maximum state by Duty ratio control, but the viewpoint for the product miniaturization, the requirement that reduces current sinking is arranged, in the situation that the lift amount of valve section is maintained maximum rating, need all the time pressure regulator to be switched on, therefore, be difficult to reduce current sinking.
Summary of the invention
The present invention does in view of above-mentioned technical problem, provide a kind of can fuel injection system without spraying and minimum the injection when controlling, by the discharge flow rate of fuel supplying device being controlled the fuel supply system of controlling by flow to pressure regulator.
The fuel supply system of internal-combustion engine of the present invention comprises: the fuel tank of accommodating fuel; Fuel supplying device by the brushless motor driving; Be arranged on the filter between above-mentioned fuel tank and above-mentioned fuel supplying device; Be built in above-mentioned fuel supplying device or be arranged near the pressure regulator of above-mentioned fuel supplying device; The fuel injection system that fuel after the pressurization of above-mentioned fuel supplying device is sprayed; And the control unit that the motor rotational speed of the opening/closing time point of above-mentioned fuel injection system and above-mentioned fuel supplying device is controlled, control by the discharge flow rate to above-mentioned fuel supplying device, control the flow that flows through above-mentioned pressure regulator.
According to fuel supply system of the present invention, can prevent that by said structure foreign matter from snapping in pressure regulator, therefore, can keep stable fuel pressure and discharge flow rate, and can avoid snapping in caused breakdown in the motor because of foreign matter.In addition, flow through the flow that passes through of pressure regulator in the time of reducing work usually, and can reduce the current sinking of pump.
Description of drawings
Fig. 1 is the structural drawing of the fuel supply system of embodiment of the present invention 1.
Fig. 2 is the structural drawing of the petrolift that uses in the fuel supply system of embodiment of the present invention 1.
Fig. 3 is the structural drawing of the pressure regulator that uses in the fuel supply system of embodiment of the present invention 1.
Fig. 4 is the graph of a relation between the lift amount of the pump rotational speed of fuel supply system of embodiment of the present invention 1 and valve section.
Symbol description
1 fuel tank
2 fuel supplying devices
3 fuel injection systems
4 filters
5 control units (ECU)
6 brushless motors
7 reciprocating pumps
8 pressure regulators
9 fuel pressure maintaining valves
10 fuel supply systems
11 main bodys
12 axles
13 swash plates
14 pistons
15 cylinders
16 shells
17 valve seats
18 ball valves
19 springs
The pushing force that P1 fuel produces
P2 elastic force
Flowing of R fuel
Embodiment
Mode of execution 1
Fuel supply system to embodiment of the present invention 1 describes.Fig. 1 is the structural drawing of the fuel supply system of mode of execution 1.
In Fig. 1, fuel supply system 10 comprises: the fuel tank 1 of accommodating fuel; Fuel supplying device 2; Fuel is discharged to the fuel injection system 3 of sucking pipe (not shown); Be arranged on the filter 4 between fuel tank 1 and fuel supplying device 2; And the control unit (hereinafter referred to as ECU) 5 that fuel supplying device 2 and fuel injection system 3 are controlled.Fuel supplying device 2 comprises: brushless motor 6; The reciprocating pump 7 as pump-unit that is driven by brushless motor 6 as described belowly; Pressure regulator 8; And fuel pressure maintaining valve 9.In addition, the fuel distribution tube between fuel tank 1 and fuel injection system 3 constitutes and makes fuel flow and can not reflux towards certain orientation.In addition, in Fig. 1, illustrated situation is that pressure regulator 8 is built in fuel supplying device 2, but also pressure regulator 8 can be disposed at fuel supplying device 2 near.
ECU5 utilizes its instruction that opening/closing time point and the emitted dose of fuel injection system 3 are controlled, and the rotational speed of brushless motor 6 is controlled.As mentioned above, utilize from the instruction of ECU5 output the rotational speed of brushless motor 6 is controlled, make reciprocating pump 7 suck fuel from fuel tank 1.The fuel of 7 pairs of suctions of reciprocating pump pressurizes, and fuel is discharged from fuel injection system 3 to sucking pipe.Pressure regulator 8 spills by a part that makes the fuel of discharging after reciprocating pump 7 pressurizations, and fuel pressure is controlled to be desired value.
The controlling method of the rotational speed of brushless motor 6 is as follows: from ECU5 to brushless motor 6 output duty cycle instructions, so that flow reaches the value that obtains after constant required flow (flowing through the flow of pressure regulator 8) for fuel pressure is kept adding on the basis that requires flow from motor.In ECU5, the relation of the Flow characteristics of dutycycle and pump is set on Transformation Graphs, utilizes this Transformation Graphs to determine the rotational speed of brushless motor 6.
Fig. 2 is the figure of explanation fuel supplying device 2, and in Fig. 2, fuel supplying device 2 comprises: be configured on the fuel distribution tube between fuel tank 1 and fuel injection system 3, and have the main body 11 of inhalation port and discharge port; What be fixed to the axle 12 that rotates with being driven by brushless motor 6 axially is predetermined angular and the swash plate 13 as swing member that carries out oscillating motion with the rotation of brushless motor 6; Be configured to a plurality of pistons 14 with swash plate 13 butts; With slidable mode and the chimeric a plurality of cylinders 15 of each piston 14; Be built in the above-mentioned pressure regulator 8 of each cylinder 15; And the shell 16 that fuel pressure maintaining valve 9 is kept.
In fuel supplying device 2, when axle 12 rotates under the driving of brushless motor 6, swash plate 13 carries out oscillating motion, disposes a plurality of piston 14 and moves back and forth along with this oscillating motion respectively, thereby fuel is discharged to sucking pipe from fuel injection system 3.In addition, consist of above-mentioned reciprocating pump 7 by remove the rear remaining part of brushless motor 6 from fuel supplying device 2.
Fig. 3 is the figure of explanation pressure regulator 8.In Fig. 3, pressure regulator 8 by valve seat 17, and valve seat 17 between consist of valve section spool be ball valve 18, be that spring 19 is consisted of with ball valve 18 towards the pushing member of valve seat 17 pushings.In addition, make because of the fuel pressure of the valve seat 17 upstreams pushing force P2 balance to pushing force P1 with the spring 19 that ball valve 18 is pushed of ball valve 18 effects, the fuel pressure of fuel supplying device 2 is regulated.In addition, the label R in Fig. 3 represents flowing of fuel.
Next, the action of the fuel supply system of mode of execution 1 described.
When usually working, reciprocating pump 7 is discharged and is added the regulation flow that obtains after constant required flow (flowing through the flow of pressure regulator 8) for fuel pressure is kept on from the basis that requires flow of starting pusher side, and ejects the fuel of established amount from fuel injection system 3.At this moment, the flow that flows through pressure regulator 8 is in the constant state that remains.
In existing apparatus; be provided with for detection of the abnormal pressure transducer of fuel pressure; but in the present embodiment; due to when the common vehicle operation; the state that often can slow down; therefore; pressure transducer is not set; and in the situation that vehicle deceleration makes the fuel injection amount of fuel injection system 3 be reduced to less than established amount; 6 outputs make the discharge flow rate of reciprocating pump 7 be maximum instruction from ECU5 to brushless motor, so that the lift amount of the valve section of pressure regulator 8 (being made of valve seat 17 and ball valve 18) becomes maximum.Thus, can remove the foreign matter of the above-mentioned valve section that snaps in pressure regulator 8, and can remove the foreign matter that is trapped in pressure regulator 8 upstreams.
In the present embodiment, need to be from common work the time emitted dose of fuel injection system 3 during to vehicle deceleration carry out above-mentioned action in short time of occuring to reduce, therefore, need to have responsiveness to the device of driven plunger pump 7.Therefore, as the rotating driving device of reciprocating pump 7, adopt the brushless motor 8 of having got rid of electric sliding contacting part and having got rid of slip resistance.In addition, to reduce current sinking as purpose, for being suppressed at, the discharge flow rate with reciprocating pump 7 adopted high efficiency reciprocating pump 7 in required inferior limit.
As shown in Figures 3 and 4, when from the above-mentioned instruction of ECU5 output, lift amount for the above-mentioned valve section of pressure regulator 8, because the position (lift amount) of ball valve 18 is that relation by the fuel that the upstream from valve seat 17 flows into the pushing force P1 that produces and the elastic force P2 that ball valve 18 is pushed determines, therefore, as long as the discharge flow rate of reciprocating pump 7 does not change, just can keep the maximum lift of above-mentioned valve section, the situation that the valve section of pressure regulator 8 closes can not occur as existing apparatus, thereby can stably remove foreign matter.In addition, due to as long as the discharge flow rate of reciprocating pump 7 is controlled the lift amount of the above-mentioned valve section that just can regulate pressure regulator 8, and adopted high efficiency reciprocating pump 7, therefore, as long as discharge required MIN discharge flow rate, can reduce current sinking.
As mentioned above, according to the fuel supply system of mode of execution 1, can prevent that foreign matter from snapping in pressure regulator 8, therefore, can keep stable fuel pressure and discharge flow rate, and can avoid snapping in caused breakdown in the motor because of foreign matter.In addition, by implementing above-mentioned control, flow through the flow that passes through of pressure regulator 8 in the time of reducing work usually, can reduce the current sinking of reciprocating pump 7.
In addition, as mentioned above, the time point that reduces occurs in the emitted dose of the fuel injection system 3 from common work the time during to vehicle deceleration, the discharge flow rate of reciprocating pump 7 is controlled to be maximum, so that the lift amount of the above-mentioned valve section of pressure regulator 8 becomes maximum, but as the time point of controlling, when the ignition key of vehicle is opened, before fuel injection system 3 carries out work, although exist fuel supplying device 2 to carry out the state that certain hour drives, carry out control same as described above and also can obtain same effect this moment.
In addition, as the time point of controlling, when idle running, although the state that exists the emitted dose of fuel injection system 3 to become minimum, carry out control same as described above and also can obtain same effect this moment.
In addition, the present invention can carry out suitable distortion and omission to mode of execution in its scope of invention.
Claims (5)
1. a fuel supply system (10) comprising:
Accommodate the fuel tank (1) of fuel;
Fuel supplying device (2) by brushless motor (6) driving;
Be arranged on the filter (4) between described fuel tank (1) and described fuel supplying device (2);
Be built in described fuel supplying device (2) or be arranged near the pressure regulator (8) of described fuel supplying device (2);
The fuel injection system (3) that fuel after described fuel supplying device (2) pressurization is sprayed; And
The control unit (5) that the motor rotational speed of the opening/closing time point of described fuel injection system (3) and described fuel supplying device (2) is controlled,
It is characterized in that,
By the discharge flow rate of described fuel supplying device (2) is controlled, control the flow that flows through described pressure regulator (8).
2. fuel supply system as claimed in claim 1, is characterized in that,
Pipe arrangement till the described fuel injection system (3) is without backflow, described pressure regulator (8) be built in described fuel supplying device (2) or be configured in described fuel supplying device (2) near.
3. fuel supply system as claimed in claim 1 or 2, is characterized in that,
The motor rotational speed control of described fuel supplying device (2) is controlled by flow described pressure regulator (8), becomes maximum to make the discharge flow rate of described fuel supplying device (2) when stopping at described fuel injection system (3).
4. fuel supply system as claimed in claim 1 or 2, is characterized in that,
When the ignition key of vehicle is opened and during described vehicle operation, when unclamping throttle during interrupts fuel, the discharge flow rate of described fuel supplying device (2) is controlled to be maximum.
5. a fuel supply system (10) comprising:
Accommodate the fuel tank (1) of fuel;
Fuel supplying device (2) by brushless motor (6) driving;
Be arranged on the filter (4) between described fuel tank (1) and described fuel supplying device (2); Be built in described fuel supplying device (2) or be arranged near the pressure regulator (8) of described fuel supplying device (2);
With the fuel injection system (3) of the fuel after described fuel supplying device (2) pressurization towards the internal-combustion engine injection; And
The control unit (5) that the motor rotational speed of the opening/closing time point of described fuel injection system (3) and described fuel supplying device (2) is controlled,
It is characterized in that,
Described fuel supplying device (2) is the larger positive-displacement piston pump of rotational speed control range (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011241984A JP5314106B2 (en) | 2011-11-04 | 2011-11-04 | Fuel supply system |
| JP2011-241984 | 2011-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103089464A true CN103089464A (en) | 2013-05-08 |
| CN103089464B CN103089464B (en) | 2015-08-26 |
Family
ID=48202481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210174614.2A Expired - Fee Related CN103089464B (en) | 2011-11-04 | 2012-05-30 | Fuel supply system |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5314106B2 (en) |
| CN (1) | CN103089464B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613510A (en) * | 2015-02-02 | 2015-05-13 | 赵宽 | Alcohol-based fuel supplying device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402060B (en) * | 2015-11-23 | 2018-02-23 | 沈阳黎明航空发动机(集团)有限责任公司 | The fueller and fuel supply method of a kind of combustion engine fuel pump variable frequency regulating speed control |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10339227A (en) * | 1997-06-10 | 1998-12-22 | Hitachi Ltd | Hydraulic pressure regulating device |
| JP2000045839A (en) * | 1998-07-24 | 2000-02-15 | Nissan Motor Co Ltd | Control device of variable pressure regulator for internal combustion engine |
| JP3663870B2 (en) * | 1997-12-25 | 2005-06-22 | 日産自動車株式会社 | In-cylinder injection internal combustion engine control device |
| CN101201035A (en) * | 2006-11-14 | 2008-06-18 | 株式会社电装 | Fuel system failure checking apparatus |
| CN101457725A (en) * | 2007-12-10 | 2009-06-17 | 株式会社日立制作所 | High-pressure fuel supply apparatus and control apparatus for internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3843484B2 (en) * | 1995-07-31 | 2006-11-08 | 株式会社デンソー | Returnless internal combustion engine fuel supply device and adjustment method thereof |
-
2011
- 2011-11-04 JP JP2011241984A patent/JP5314106B2/en not_active Expired - Fee Related
-
2012
- 2012-05-30 CN CN201210174614.2A patent/CN103089464B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10339227A (en) * | 1997-06-10 | 1998-12-22 | Hitachi Ltd | Hydraulic pressure regulating device |
| JP3663870B2 (en) * | 1997-12-25 | 2005-06-22 | 日産自動車株式会社 | In-cylinder injection internal combustion engine control device |
| JP2000045839A (en) * | 1998-07-24 | 2000-02-15 | Nissan Motor Co Ltd | Control device of variable pressure regulator for internal combustion engine |
| CN101201035A (en) * | 2006-11-14 | 2008-06-18 | 株式会社电装 | Fuel system failure checking apparatus |
| CN101457725A (en) * | 2007-12-10 | 2009-06-17 | 株式会社日立制作所 | High-pressure fuel supply apparatus and control apparatus for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613510A (en) * | 2015-02-02 | 2015-05-13 | 赵宽 | Alcohol-based fuel supplying device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013096356A (en) | 2013-05-20 |
| JP5314106B2 (en) | 2013-10-16 |
| CN103089464B (en) | 2015-08-26 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20210530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |