EP0693620A2 - Automatische Startvorrichtung für Brennkraftmaschine - Google Patents

Automatische Startvorrichtung für Brennkraftmaschine Download PDF

Info

Publication number
EP0693620A2
EP0693620A2 EP95107919A EP95107919A EP0693620A2 EP 0693620 A2 EP0693620 A2 EP 0693620A2 EP 95107919 A EP95107919 A EP 95107919A EP 95107919 A EP95107919 A EP 95107919A EP 0693620 A2 EP0693620 A2 EP 0693620A2
Authority
EP
European Patent Office
Prior art keywords
thermo
wall
engine
case body
automatic starter
Prior art date
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
EP95107919A
Other languages
English (en)
French (fr)
Other versions
EP0693620A3 (de
EP0693620B1 (de
Inventor
Kazuhito C/O Nippon Thermostat Co. Ltd. Shibuya
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.)
Nippon Thermostat Co Ltd
Original Assignee
Nippon Thermostat Co Ltd
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.)
Filing date
Publication date
Application filed by Nippon Thermostat Co Ltd filed Critical Nippon Thermostat Co Ltd
Publication of EP0693620A2 publication Critical patent/EP0693620A2/de
Publication of EP0693620A3 publication Critical patent/EP0693620A3/de
Application granted granted Critical
Publication of EP0693620B1 publication Critical patent/EP0693620B1/de
Anticipated expiration legal-status Critical
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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/10—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat
    • F02M1/12—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat with means for electrically heating thermostat

Definitions

  • the invention concerns an improved automatic starter provided on engines installed in motorcycles, motor scooters, automobiles, etc.
  • the present invention concerns a compact automatic starter having an excellent thermal insulation around a thermo-element provided in the automatic starter for the engines.
  • an automatic starter is normally provided on the engine in order to ease starting the engine smoothly in a cold morning.
  • the automatic starter is to increase the fuel-to-air ratio for better ignition of a gas mixture of the fuel and the air in the cylinders at low temperatures of the engine by actuating a valve to open a fuel-supply-inlet of an auxiliary fuel passageway provided along a gas mixture passageway to add fuel to the gas mixture flowing in the gas mixture passageway.
  • the fuel-supply-inlet of the auxiliary fuel passageway is closed to return the fuel-to-air ratio to normal automatically.
  • the valve is actuated by means of a thermo-element in which a thermally expanding unit expanding and contracting with a change in the temperature is included to open and close a fuel-supply-inlet.
  • the expansion and contraction of the thermally expanding unit move a piston to actuate a needle valve for opening and closing the fuel-supply-inlet.
  • the thermally expanding unit While the temperature around the thermally expanding unit of the automatic starter is low at the beginning of starting the engine, the thermally expanding unit is contracted to keep the piston having the needle valve away from the fuel-supply-inlet and remain open toward the auxiliary fuel passageway.
  • the fuel-supply-inlet should be closed forcibly by the needle valve
  • the automatic starter is provided with a heating element on one side of the thermo-element to heat up the heating element with heat generated by electric current when a key-switch is turned on to expand the thermally expanding unit and move the piston having the needle valve to shut off the fuel supply by closing the fuel-supply-inlet.
  • the thermally expanding unit of the automatic starter If the thermal insulation of the thermally expanding unit of the automatic starter is poor, the thermally expanding unit remains contracted and the fuel-supply-inlet is kept open to supply excessive fuel to the gas mixture passageway. As a result, the engine cannot be restarted smoothly for a few minutes after the engine is turned off. For this reason the conventional automatic starters are provided with a thermally insulated cover each over the outer surface of the case body.
  • thermally insulated cover over the outer surface of the case body makes the automatic starter larger and requires much works for the assembly of the automatic starter with a higher cost.
  • a larger automatic starter hinders a freedom in designing of a compact motor scooter which requires as large compartment underneath the seat as possible for storing some items therein.
  • An objective of the present invention is to eliminate the thermally insulated cover provided over the outer surface of the case body of the automatic starter in order to obtain a compact automatic starter through fewer parts assembly and a greater freedom in designing of a compact motor scooter, etc.
  • Another objective of the present invention is to improve the thermal insulation of the thermally expanding unit of the thermo-element to enable smooth re-starting of the engine.
  • the automatic starter according to the present invention is provided with a thermally expanding unit, which expands and contracts with a change in the outer temperature, on one side and a piston on the other side of a thermo-element which moves the piston forward and backward.
  • a heating unit is provided on the one side of the thermo-element to forcibly move the piston.
  • the heating unit is heated up by electric current turned on with starting the engine to expand the thermally expanding unit and move the piston to close a fuel-supply-inlet of an auxiliary fuel passageway provided along a gas mixture passageway supplying the gas mixture to the engine.
  • the automatic starter according to the present invention as set forth above is formed with a hollow in the wall of the case body of the automatic starter in which the thermo-element is housed.
  • the wall of the case body is divided into an inner wall and an outer wall to form the hollow between the inner wall and the outer wall and a thermal insulation is provided in the hollow, thereby thermal conduction from the inner wall to the outer wall is reduced.
  • the automatic starter according to the present invention can reduce the heat radiation from the surface of the case body more effectively by filling the air, a liquid or a solid insulating material in the hollow formed in the case body.
  • thermo-element the thermal insulation over the thermo-element can be achieved without the thermally insulated cover over the outer surface of the case body and thus the construction of the automatic starter can be more compact and less costly
  • the automatic starter according to the present invention is provided with an excellent thermal insulation and therefore the automatic starter can also eliminate the difficulty in restarting the engine for a few minutes after the engine is turned off by preventing an excess supply of the fuel.
  • Figure 1 is a drawing showing a sectional side view of the automatic starter according to the present invention.
  • Figure 2 is a plan drawing of the automatic starter according to the present invention.
  • a case body 1 is a cylinder bended in an L-shape with both ends open having a heavy thickness.
  • An opening 1a of the one end of the case body 1 is provided with a thread 1c and a rubber grommet 11 is coupled into an opening 1b of the other end of the case body 1 to prevent an entry of water or dust, etc.
  • the opening 1a is coupled with a cylindrical holder 2 on the outer surface of which a screw 2a is formed tomate with the thread 1c.
  • a thermo-element T moving a needle valve is included in the case body 1 and is held therein by the holder 2 not to remove therefrom.
  • the inner diameter of the case body 1 is tapered wider toward the opening 1a for easy insertion of the thermo-element T and a bottom 1e is provided at the one end of the thermo-element T in which a thermal sensor T having a thermally expanding unit Ta is provided.
  • the portion where the inner diameter of the case body 1 varies is formed with a moderate slope 1d to guide the thermo-element T into the case body 1.
  • thermo-element T is mounted on the outer surface of the thermal sensor T.
  • the thermo-element T is prevented from lateral movement in the case body by pushing the O-ring against the inner suface of the case body 1 as well as for the prevention of an entry of gasoline, etc.
  • a heating means E having 2 electrodes and a heating element pinched between the 2 electrodes is provided between the thermal sensor T and the bottom 1e of the case body 1.
  • the heating means E is to forcibly expand the thermally expanding unit Ta and is connected with a key-switch (not shown) of a motor scooter, etc. by lead wires 12 and 12 of the electrodes coming out of the opening 1b through the grommet 11.
  • a tube protector 13 is to tie the lead wires 12 and 12.
  • the heating means E is formed with a holder having a cup-shape.
  • a side view of the holder is shown in Fig.1.
  • the 2 electrodes are housed in the holder which is provided with nails and cuts on the edge of the holder in which the heating element is neatly placed and pinched between the 2 electrodes and secured tightly on the cuts by the nails as a mono-block unit.
  • the holder is formed with an electrically insulated and elastic material such as nylon to prevent a displacement or poor contact of the electrodes as well as for ready installation of the heating means E.
  • a piston 7b being moved with the expansion and contraction of the thermally expandng unit Ta is properly guided by a piston guide 7a provided on the other side of the thermo-element T.
  • the tip of the piston 7b is projected from the end of the piston guide 7a to slide in the hole of the holder 2 and connected with a pushing unit 7 which covers the piston guide 7a and the tip of the piston 7b.
  • the pushing unit 7 is constantly pulled inward in the case body 1 by a spring such as a coil spring 8 and thereby the thermo-element T is pushed against the bottom 1e of the case body 1 to regulate a axial movement of the thermo-element.
  • the thermally expanding unit Ta is expanded with the heat generated in the heating unit E by the electric current and extend the piston 7b and push the pushing unit 7 out of the case body 1 by opposing the pulling force of the coil spring 8 to close the fuel-supply-inlet with a needle valve (not shown) to shut off the fuel supply.
  • a needle valve (not shown) to shut off the fuel supply.
  • a hollow 6 is formed in the wall of the case body 1 circumferencially from the one opening 1a to the other opening 1b.
  • the hollow 6 can be formed together with the case body 1 when the case body 1 is formed through an injection molding process or after the case body 1 is molded the hollow 6 can be formed by an end-milling or an arc-processing.
  • a thermally insulating means is provided in the hollow 6 to prevent the heat around the thermo-element T from radiating from the surface of the case body 1.
  • Air is most common as a thermal insulator but other solid or liquid thermal insulators such as urethane, foamed styrene, a rubber insulator or oil having low thermal conductivities can be used for effective prevention of the heat radiation from the surface of the case body 1.
  • solid or liquid thermal insulators such as urethane, foamed styrene, a rubber insulator or oil having low thermal conductivities can be used for effective prevention of the heat radiation from the surface of the case body 1.
  • the hollow 6 formed in the wall of the case body 1 divides the wall of the case body 1 into an inner wall 4 and an outer wall 3.
  • the inner wall 4 is connected with the outer wall 3 by way of a connector 5.
  • the connector 5 is preferably formed as small as possible within the range of permissible strength so that the thermal conduction from the inner wall 4 to the outer wall 3 can be minimized.
  • the thermal insulators to prevent the thermal conduction from the inner wall 4 to the outer wall 3 are not limited to such air, urethane, foamed styrene, insulating rubber or oil as set forth in the above preferred embodiments.
  • both opening ends of the hollow 6 can be closed and the air is removed therefrom to vacuum the hollow 6 for thermal insulation. Further, a gas such as nitrogen can be charged in the hollow 6 for thermal insulation. Merely closing both opening ends of the hollow 6 can shut off the air movement inward or outward for effective reduction of the thermal conduction from the inner wall 4 to the outer wall 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
EP95107919A 1994-07-22 1995-05-23 Automatische Startvorrichtung für Brennkraftmaschine Expired - Lifetime EP0693620B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6170886A JPH0828355A (ja) 1994-07-22 1994-07-22 エンジンのオートスタータ装置
JP170886/94 1994-07-22
JP17088694 1994-07-22

Publications (3)

Publication Number Publication Date
EP0693620A2 true EP0693620A2 (de) 1996-01-24
EP0693620A3 EP0693620A3 (de) 1997-07-16
EP0693620B1 EP0693620B1 (de) 2002-01-02

Family

ID=15913146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107919A Expired - Lifetime EP0693620B1 (de) 1994-07-22 1995-05-23 Automatische Startvorrichtung für Brennkraftmaschine

Country Status (6)

Country Link
EP (1) EP0693620B1 (de)
JP (1) JPH0828355A (de)
KR (1) KR100301953B1 (de)
CN (1) CN1072768C (de)
DE (1) DE69524821T2 (de)
TW (1) TW284828B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188921A2 (de) * 2000-09-18 2002-03-20 DUCATI ENERGIA S.p.A. Apparate für die Steuerung des Starters eines Verbrennungsmotors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05253360A (ja) 1992-03-16 1993-10-05 Sanyo Electric Co Ltd 電気かみそりの外刃

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57148046A (en) * 1981-03-09 1982-09-13 Toyota Motor Corp Temperature sensing controller of carburetor
JP3122477B2 (ja) * 1991-01-25 2001-01-09 三信工業株式会社 船舶推進機の始動装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05253360A (ja) 1992-03-16 1993-10-05 Sanyo Electric Co Ltd 電気かみそりの外刃

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188921A2 (de) * 2000-09-18 2002-03-20 DUCATI ENERGIA S.p.A. Apparate für die Steuerung des Starters eines Verbrennungsmotors
EP1188921A3 (de) * 2000-09-18 2004-08-25 DUCATI ENERGIA S.p.A. Apparate für die Steuerung des Starters eines Verbrennungsmotors

Also Published As

Publication number Publication date
EP0693620A3 (de) 1997-07-16
DE69524821D1 (de) 2002-02-07
CN1118040A (zh) 1996-03-06
EP0693620B1 (de) 2002-01-02
TW284828B (de) 1996-09-01
JPH0828355A (ja) 1996-01-30
CN1072768C (zh) 2001-10-10
DE69524821T2 (de) 2002-08-29
KR100301953B1 (ko) 2001-11-22

Similar Documents

Publication Publication Date Title
CA1329520C (en) Heated inlet manifold
EP0925438B1 (de) Kraftstoffeinfüllvorrichtung für eine brennkraftmaschine
EP0693620B1 (de) Automatische Startvorrichtung für Brennkraftmaschine
EP1734236B1 (de) Leerlaufluftregelvorrichtung für kraftstoffeinspritzvorrichtung
US4356804A (en) Fuel evaporator
US5378411A (en) Automatic choke system for carburetor
JP3619327B2 (ja) 気化器の始動燃料調整装置
US3768453A (en) Exhaust emission control for internal combustion engines utilizing anelectrically heated choke
EP0801222B1 (de) Kaltstartvorrichtung für Brennkraftmaschine
US6374790B1 (en) Model airplane engine having a heated backplate
JP3662963B2 (ja) エンジンの保温カバー付きオートチョーク装置の組立方法
KR100361926B1 (ko) 동절기에 시동 불량 방지용 디젤 엔진의 연료 필터
JPS638824Y2 (de)
JPS6143957Y2 (de)
KR200202326Y1 (ko) 순간 가열 플러그
JPH0341669B2 (de)
JP3358075B2 (ja) エンジンのオートチョーク装置
US1317269A (en) Starting mechanism fob
JPH0139880Y2 (de)
JP3372516B2 (ja) 気化器の感温制御装置
JPH07238868A (ja) エンジンのオートスタータ装置
JP2001317408A (ja) 気化器の自動始動装置
KR200234187Y1 (ko) 차량용흡기계순간가열장치
JP2001185274A (ja) 差込みコネクタ
JPH08100709A (ja) エンジン用気化器の始動装置

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19980108

17Q First examination report despatched

Effective date: 19991222

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 69524821

Country of ref document: DE

Date of ref document: 20020207

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020522

Year of fee payment: 8

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
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: 20030523

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030523

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080529

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080526

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100129

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: 20090602

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080514

Year of fee payment: 14

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: 20091201

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: 20090523