EP0773357A2 - Système de pompe à carburant muni d'un solénoide - Google Patents

Système de pompe à carburant muni d'un solénoide Download PDF

Info

Publication number: EP0773357A2
Authority: EP; European Patent Office
Prior art keywords: coil; thermistor; solenoid; switch; current
Prior art date: 1995-11-13
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP96117672A

Other languages

German (de)

English (en)

Other versions

EP0773357B1 (fr

EP0773357A3 (fr

Inventor

Rudolp Andrew Peterson, Jr.

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Deere and Co

Original Assignee

Deere and Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1995-11-13

Filing date

1996-11-05

Publication date

1997-05-14

1996-11-05 Application filed by Deere and Co filed Critical Deere and Co

1997-05-14 Publication of EP0773357A2 publication Critical patent/EP0773357A2/fr

1999-02-10 Publication of EP0773357A3 publication Critical patent/EP0773357A3/fr

2002-07-24 Application granted granted Critical

2002-07-24 Publication of EP0773357B1 publication Critical patent/EP0773357B1/fr

2016-11-05 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions

Definitions

the invention relates to a fuel pump system for an internal combustion engine having a solenoid which can be connected to a power source and which has a coil in order to activate the fuel supply during the starting process.
solenoids are often used to shut off the fuel supply from the injection pump when the engine is switched off.
Such solenoids have two coils, namely a so-called pull-in coil and a holding coil.
the feed coil is activated for a short time, which requires up to 50 amps.
the holding coil whose power consumption is significantly lower, takes over the task of the feed coil and keeps the fuel supply open. The feed spool is then no longer live to avoid overheating.
the feed coil is connected to the ignition lock start terminal, i. H. the terminal that connects to the battery when the key is in the start position.
the object to be achieved with the invention is seen in preventing overheating of the solenoid responsible for the supply of fuel by simple and reliable means which, in particular, do not depend on the operating state of the engine.
This object has been achieved in that a thermistor which heats up in the current-carrying state is wired to the coil, a switch being connected to the thermistor and to the coil, which switches the current flow through the thermistor can interrupt.
a thermistor or semiconductor resistor with a temperature-controlled resistance value heats up within seconds, and as the temperature increases, the passage of current through the coil to which it is connected is finally reduced to zero. In this way, overheating or burning through of the solenoid is avoided in a simple and safe manner.
the invention further provides that the switch has a first terminal connected to the coil and a second terminal connected to the thermistor and opens depending on the heating of the thermistor.
the switch is part of a relay, the coil of which is connected to the first terminal of the switch, the thermistor being provided between the second terminal of the switch and the ground, and the coil of the relay being connected to the Thermistor is connected in parallel. In this way, if the coil is energized when the key is in its starting position, the thermistor will immediately heat up, the current flowing through the coil not being sufficient to excite the relay such that its switch opens immediately. This takes place with a short time delay. After opening the thermistor, it can cool down immediately.
the coil of the solenoid connected to the thermistor is designed as a pull-in coil, the solenoid also being provided with a holding coil.
a diesel engine is designated 10. This is provided with a control circuit 12 (RUN CONTROL) for operation, which is connected to a terminal of a battery 14 or another suitable power source.
a fuel injection system 20 for the engine 10 is provided with a solenoid 22 for selectively shutting off fuel to the engine when the engine start switch is moved to its off position.
the solenoid 22 is equipped with a holding coil 26 and a feed coil 28.
the coil 26 is connected to an input line 32 and the coil 28 to an input line 34. Both input lines are in turn connected to an output line of the control circuit 12.
the output lines 36 and 38 of the coils 26 and 28 are connected to ground on the one hand and to a circuit 40 on the other hand, which has a current-limiting effect for the feed coil.
the holding coil 26 has a relatively small static current draw, while the pull-in coil 28 has a relatively high current draw on the order of up to 50 amps.
the circuit 40 is connected in series with the feed coil 28 and has a relay 44 which is provided with an activation coil 48.
This coil 48 is connected to the output line 38 and thus in series with the feed coil 28.
a pair of switchable lines 52 and 54 are connected to one another at their outputs at 56 and to the first line of a thermistor 60 with a positive temperature coefficient.
the other line of thermistor 60 is grounded. The resistance of the thermistor increases significantly as it heats up, and the temperature rises rapidly as the current of the feed coil 28 flows through the thermistor.
the thermistor is connected in series to the feed coil 28.
the thermistor is a commercially available one, such as a PCL from Midwest Components or the like from Thermodisc Inc., and has a low initial resistance to allow enough pull-in current when the coil 28 is connected.
the voltage on the relay coil 48 depends on the voltage on the thermistor 60 and on its temperature. Initially, the resistance of the thermistor is low and its voltage drop is insufficient to activate relay 44. On the other hand, when a large pull-in current flows through it, the thermistor 60 heats up very quickly and the flow of current through the pull-in coil 28 decreases. Within a predetermined period of time after current from the control circuit 12 to the solenoid 22, preferably within three seconds or less, the thermistor resistance and voltage across the thermistor increase, thereby activating the relay 44.
the relay 44 If the relay 44 is activated, the circuit between the feed coil 28 and the thermistor 60 is interrupted at the same time, so that no current flows through the thermistor and the thermistor can cool down quickly.
the relay 44 When the relay 44 is activated, the current flow through the feed coil 28 is limited to a relatively small nominal current draw from the activation coil 48.
the relay 44 remains in its activated state as long as the line 34 of the feed coil 28 is live. However, if the power to the fuel solenoid is interrupted for any reason, the relay will move to its non-activated state and connect the cooled thermistor 60 to the feed coil 28 so that immediately after the leads 32 and 34 are energized again, the feed coil 28 the solenoid 22 will activate.
the relay 44 With a time delay, which is caused by the circuit 40, the relay 44 becomes active again in order to interrupt the current connection to the thermistor 60, so that the thermistor can cool down. At the same time, the current flow through the feed coil 28 is reduced to the small current requirement of the activation coil 48.
the holding coil 26 holds the fuel solenoid 22 in the position for fuel flow after the time delay until the current flow to the solenoid 22 is interrupted.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Fuel-Injection Apparatus (AREA)
High-Pressure Fuel Injection Pump Control (AREA)
Electromagnetic Pumps, Or The Like (AREA)

EP96117672A 1995-11-13 1996-11-05 Système de pompe à carburant muni d'un solénoide Expired - Lifetime EP0773357B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US08/557,750 US5549084A (en)	1995-11-13	1995-11-13	Fuel shut-off solenoid pull-in coil current limiter
US557750		1995-11-13

Publications (3)

Publication Number	Publication Date
EP0773357A2 true EP0773357A2 (fr)	1997-05-14
EP0773357A3 EP0773357A3 (fr)	1999-02-10
EP0773357B1 EP0773357B1 (fr)	2002-07-24

Family

ID=24226739

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP96117672A Expired - Lifetime EP0773357B1 (fr)	1995-11-13	1996-11-05	Système de pompe à carburant muni d'un solénoide

Country Status (4)

Country	Link
US (1)	US5549084A (fr)
EP (1)	EP0773357B1 (fr)
CA (1)	CA2177102C (fr)
DE (1)	DE59609476D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3919254B2 (ja) *	1996-04-30	2007-05-23	京三電機株式会社	エンジン停止用ソレノイド

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5379733A (en)	1993-10-29	1995-01-10	Deere & Company	Fuel shut-off solenoid pull-in coil relay

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4132210A (en) *	1976-10-01	1979-01-02	Allied Chemical Corporation	Fuel injection system with switchable starting mode
US4147151A (en) *	1976-12-27	1979-04-03	Wright George L	Engine malfunction protection
US4577604A (en) *	1984-09-28	1986-03-25	Nissan Motor Company, Limited	Control system for fuel pump for internal combustion engine
JPH0610432B2 (ja) *	1985-05-10	1994-02-09	株式会社豊田自動織機製作所	エンジン式車両における燃料遮断装置
JP2878764B2 (ja) *	1990-03-15	1999-04-05	株式会社日立製作所	点火通電時間制御装置
JPH04112945A (ja) *	1990-09-03	1992-04-14	Hitachi Ltd	エンジン燃料遮断装置

1995
- 1995-11-13 US US08/557,750 patent/US5549084A/en not_active Expired - Fee Related
1996
- 1996-05-22 CA CA002177102A patent/CA2177102C/fr not_active Expired - Fee Related
- 1996-11-05 EP EP96117672A patent/EP0773357B1/fr not_active Expired - Lifetime
- 1996-11-05 DE DE59609476T patent/DE59609476D1/de not_active Expired - Fee Related

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5379733A (en)	1993-10-29	1995-01-10	Deere & Company	Fuel shut-off solenoid pull-in coil relay

Also Published As

Publication number	Publication date
EP0773357B1 (fr)	2002-07-24
EP0773357A3 (fr)	1999-02-10
CA2177102A1 (fr)	1997-05-14
CA2177102C (fr)	2000-02-22
DE59609476D1 (de)	2002-08-29
US5549084A (en)	1996-08-27

Legal Events

Date	Code	Title	Description
1997-03-27	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1997-05-14	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB IT SE
1998-12-23	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1999-02-10	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB IT SE
1999-04-21	17P	Request for examination filed	Effective date: 19990224
2001-11-29	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
2002-01-16	17Q	First examination report despatched	Effective date: 20011204
2002-01-31	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
2002-01-31	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
2002-03-27	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: DEERE & COMPANY
2002-05-31	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
2002-06-07	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
2002-07-24	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB IT SE
2002-07-24	REG	Reference to a national code	Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH
2002-08-29	REF	Corresponds to:	Ref document number: 59609476 Country of ref document: DE Date of ref document: 20020829
2002-10-16	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 20020919
2002-10-25	ET	Fr: translation filed
2002-11-14	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: SE Payment date: 20021114 Year of fee payment: 7
2002-11-15	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 20021115 Year of fee payment: 7
2002-11-23	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20021123 Year of fee payment: 7
2002-11-25	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20021125 Year of fee payment: 7
2003-05-30	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
2003-05-30	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
2003-07-16	26N	No opposition filed	Effective date: 20030425
2003-11-05	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031105
2003-11-06	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031106
2004-06-02	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040602
2004-06-23	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20031105
2004-06-29	EUG	Se: european patent has lapsed
2004-07-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040730
2004-09-10	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST
2005-11-05	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051105

Publication	Publication Date	Title
EP0704097B1 (fr)	2000-02-16	Procede et dispositif de commande de consommateurs electromagnetiques
EP0481997B1 (fr)	1994-06-01	Circuit de protection du demarreur
EP0651157B1 (fr)	1996-09-11	Circuit de courant pour commutateur de démarrage d'un moteur
DE2805028A1 (de)	1978-08-10	Vorrichtung zur steuerung eines elektromagnetischen ventils
DE2720488A1 (de)	1977-12-08	Steueranlage fuer ein gasturbinentriebwerk
DE1288849B (de)	1969-02-06	Anlassvorrichtung fuer einen Dieselmotor
EP0205806B1 (fr)	1989-10-25	Procédé et circuit de commande d'une soupape
EP0773357B1 (fr)	2002-07-24	Système de pompe à carburant muni d'un solénoide
EP0497197B1 (fr)	1994-12-28	Circuit d'allumage et de régulation pour un véhicule
EP1032950B1 (fr)	2003-08-06	Circuit de decharge pour element de reglage capacitif
DE2205108B2 (de)	1976-05-06	Anlassteuervorrichtung fuer brennkraftmaschinen der diesel- oder aehnlichen bauart
DE102004032721A1 (de)	2006-02-16	Vorrichtung und Verfahren zur Ansteuerung einer Induktivität
DE2825830C2 (de)	1986-10-09	Zündeinrichtung für Brennkraftmaschinen
DE1954630A1 (de)	1970-05-14	Anordnung zum Anlassen und Abstellen eines Dieselmotors
DE102011107010B4 (de)	2016-07-14	Starteinrichtung für einen elektrischen Motor
DE2833049A1 (de)	1979-04-26	Starteranordnung fuer verbrennungskraftmaschinen mit innerer verbrennung
DE3233596C2 (fr)	1991-04-04
DE2402083A1 (de)	1975-07-31	Steuerungsvorrichtung fuer magnetventile, insbesondere an verdichteranlagen
DE102009029226A1 (de)	2011-03-17	Startvorrichtung für Verbrennungsmotoren
DE3543816C2 (fr)	1987-11-26
DE680050C (de)	1939-08-21	Anordnung bei Brennkraftmaschinen mit einer Anlassvorrichtung
DE2425305A1 (de)	1975-10-23	Schaltungsanordnung eines feuerungsautomaten
DE3935942C2 (de)	1997-04-24	Feuerungsautomat für ein gasbeheiztes Gerät
EP0585478B1 (fr)	1996-11-13	Dispositif de commande pour un brûleur à gaz
DE1808145C (de)	1971-07-22	Steuergerat fur den Anlauf einer Feuerungsanlage