JPS6226374A - Start assisting device for spark ignition type internal-combustion engine - Google Patents
Start assisting device for spark ignition type internal-combustion engineInfo
- Publication number
- JPS6226374A JPS6226374A JP16296285A JP16296285A JPS6226374A JP S6226374 A JPS6226374 A JP S6226374A JP 16296285 A JP16296285 A JP 16296285A JP 16296285 A JP16296285 A JP 16296285A JP S6226374 A JPS6226374 A JP S6226374A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- engine
- combustion engine
- bypath
- spark ignition
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000000498 cooling water Substances 0.000 claims abstract description 76
- 239000000446 fuel Substances 0.000 abstract description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000009834 vaporization Methods 0.000 abstract description 4
- 230000008016 vaporization Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は主としてアルコール燃料を使用する火花点火式
内燃機関の始動補助装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a starting assist device for a spark-ignition internal combustion engine that primarily uses alcohol fuel.
アルコール燃料を使用し、スパークプラグで点火させる
火花点火式内燃機関においては、アルコール燃料が低温
時に気化しにくく、かつガソリン等に比べて気化熱量が
大きいため、低温始動時にアルコールの蒸気量が可燃範
囲に達しにくいため、機関の始動が困難であるという問
題がある。In a spark-ignition internal combustion engine that uses alcohol fuel and ignites it with a spark plug, alcohol fuel is difficult to vaporize at low temperatures and has a large amount of heat of vaporization compared to gasoline, etc., so the amount of alcohol vapor falls within the flammable range when starting at low temperatures. There is a problem in that it is difficult to start the engine because it is difficult to reach this point.
一方、このような火花点火式内燃機関に対して、その低
温時の始動性を補助するために、冷却水入口から空気冷
却器に至る供給路と、空気冷却器から冷却水出口に至る
排出路から構成される空気冷却器への冷却水供給系統に
、上記冷却水入口と出口を直結するバイパス路を設ける
と共に、このバイパス路と排出路を選択的に冷却水出口
に連通させる切換弁を設置し、かつ上記排出路から分岐
してポンプ及びヒータを経て供給路に合流する温水循環
系統を設け、然して機関の負荷を検知し、始動時及び低
負荷時に上記切換弁をバイパス路が冷却水出口に連通ず
る状態とすると共に、上記ポンプ及びヒータを作動せし
める検出器を具備した空気冷却器付内燃機関の空気加熱
装置に関する実開昭５６−９２７２０の考案がなされて
いるが、この考案は空気冷却器を介して吸気加熱するこ
とにより始動補助をするようにしたものであり、アルコ
ール燃料自体が暖められるものではないので、始動が円
滑に行なわれないという欠点がある。On the other hand, in order to assist the startability of such a spark ignition internal combustion engine at low temperatures, there is a supply path from the cooling water inlet to the air cooler, and a discharge path from the air cooler to the cooling water outlet. In the cooling water supply system to the air cooler consisting of, a bypass path is provided that directly connects the cooling water inlet and outlet, and a switching valve is installed that selectively connects the bypass path and the discharge path to the cooling water outlet. In addition, a hot water circulation system is installed which branches off from the above-mentioned discharge path and joins the supply path through a pump and a heater.The system detects the load of the engine, and the bypass path connects the above-mentioned switching valve to the cooling water outlet at the time of starting and at low load. Japanese Utility Model Application No. 56-92720 has been devised regarding an air heating device for an internal combustion engine with an air cooler, which is equipped with a detector for operating the pump and heater. The engine is designed to assist in starting by heating the intake air through a device, and since the alcohol fuel itself is not warmed, there is a drawback that starting cannot be performed smoothly.
そこで本発明は、前記従来の問題点を解消し、アルコー
ル燃料を使用した内燃機関の機関停止時に機関内の冷却
水系路を暖機することにより、その機関始動を容易に行
なわせうる火花点火式内燃機関の始動補助装置を提供す
ることを目的としたものである。Therefore, the present invention solves the above-mentioned conventional problems, and provides a spark ignition type internal combustion engine that uses alcohol fuel to easily start the engine by warming up the cooling water line in the engine when the engine is stopped. The object is to provide a starting assist device for an internal combustion engine.
即ち、本発明の火花点火式内燃機関の始動補助装置は、
熱交換器を介設した冷却水供給回路を機関内の冷却水系
路に連通可能に設けた火花点火式内燃機関において、冷
却水温を一定に保持可能なヒータを装備した冷却水予備
タンクを設け、その冷却水予備タンクと機関内の冷却水
系路との間に冷却水を循環可能なバイパス回路を設ける
と共に、機関停止時及び始動時に該バイパス回路のみを
機関内の冷却水系路に連通し、機関始動後その冷却水が
所定温度を越えた時点で上記バイパス回路及び冷却水供
給回路を機関内の冷却水系路に連通し、更に上記の冷却
水が次の所定温度以上に到達後は冷却水供給回路のみを
機関内の冷却水系路に連通ずるような制御装置を設ける
ことにより構成される。That is, the starting assist device for a spark ignition internal combustion engine of the present invention has the following features:
In a spark ignition internal combustion engine in which a cooling water supply circuit with a heat exchanger is provided so as to be able to communicate with a cooling water system path within the engine, a cooling water reserve tank equipped with a heater capable of maintaining a constant cooling water temperature is provided, A bypass circuit that can circulate cooling water is provided between the cooling water reserve tank and the cooling water system path inside the engine, and when the engine is stopped and started, only the bypass circuit is connected to the cooling water system path inside the engine. After startup, when the cooling water exceeds a predetermined temperature, the bypass circuit and the cooling water supply circuit are connected to the cooling water system path in the engine, and when the cooling water reaches the next predetermined temperature or higher, the cooling water is supplied. It is constructed by providing a control device that connects only the circuit to the cooling water system path within the engine.
以下図面を参照して本発明の詳細な説明するが、第１図
は本発明の一実施例における火花点火式内燃機関の始動
補助装置の概略システム図である。The present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic system diagram of a starting assist device for a spark ignition internal combustion engine in one embodiment of the present invention.
この内燃機関（以下機関１と称する）は、燃料としてア
ルコール燃料を使用し、かつ図示されていないスパーク
プラグにより点火される火花点火式のものであり、その
機関１内の冷却水系路１２には、熱交換器２を介設した
冷却水供給回路１３が連通可能に設けられており、この
冷却水供給回路１３内の冷却水は機械式の循環ポンプ３
により冷却水人口１４及び冷却水出口１５を経由して、
機関１内を循環可能になっており、この冷却水供給回路
１３の冷却水出口１５側には、電磁弁５及びサーモスタ
ット切換弁４が介設されている。This internal combustion engine (hereinafter referred to as engine 1) is a spark ignition type engine that uses alcohol fuel as fuel and is ignited by a spark plug (not shown). , a cooling water supply circuit 13 with a heat exchanger 2 interposed therebetween is provided so as to be able to communicate with the cooling water supply circuit 13, and the cooling water in this cooling water supply circuit 13 is supplied to a mechanical circulation pump 3.
Through the cooling water population 14 and the cooling water outlet 15,
The cooling water can be circulated within the engine 1, and a solenoid valve 5 and a thermostatic switching valve 4 are provided on the cooling water outlet 15 side of the cooling water supply circuit 13.
次に、上記機関１の外部に、ヒータ１０を装備した冷却
水予備タンク９と、上記機関ｌ内の冷却水系路１２とを
連通可能な温水供給用のバイパス回路１６が設けられ、
このバイパス回路１６の冷却水予備タンク９からの出側
配管に電磁弁６及び電気式の循環ポンプ８を介設し、ま
た冷却水予備タンク９への入側配管に電磁弁７を設けて
いる。Next, a bypass circuit 16 for supplying hot water is provided outside the engine 1, which allows communication between a cooling water reserve tank 9 equipped with a heater 10 and a cooling water system path 12 inside the engine 1.
A solenoid valve 6 and an electric circulation pump 8 are interposed in the outlet pipe from the cooling water reserve tank 9 of this bypass circuit 16, and a solenoid valve 7 is provided in the inlet pipe to the coolant reserve tank 9. .
更に、この機関１には回転検出センサ２１を設け、冷却
水予備タンク９には、水温センサ２２を設けており、こ
れらを入力インターフェイス３１、制御部３２及び出力
インターフェイス３３からなる制御装置の入力インター
フェイス３１に接続すると共に、出力インターフェイス
３３には上記各電磁弁５．６，７、循環ポンプ８及びヒ
ータ１０を接続している。Furthermore, this engine 1 is provided with a rotation detection sensor 21, and the cooling water reserve tank 9 is provided with a water temperature sensor 22, and these are used as an input interface of a control device consisting of an input interface 31, a control section 32, and an output interface 33. 31, and the output interface 33 is also connected to the above-mentioned electromagnetic valves 5, 6, 7, circulation pump 8, and heater 10.
なお、上記の本発明の実施例の始動補助装置においては
、その制御装置を入力インターフェイス３１、制御部３
２及び出力インターフェイス３３等により構成している
が、この制御装置としては上記の実施例に限定されるも
のではなく、どのような制御装置でも良い。In the starting assist device according to the embodiment of the present invention described above, the control device is connected to the input interface 31 and the control section 3.
2, an output interface 33, etc., but this control device is not limited to the above-mentioned embodiment, and any control device may be used.
以上の構成からなる本発明の始動補助装置の作用を説明
すると、機関１の停止時に冷却水予備タンク９内の冷却
水を温度センサ２２とヒータ１０を用いて、一定温度、
例えば約４０℃に加熱保持しておき、更にバイパス回路
１６の電磁弁６及び７を開き、機関１側の電磁弁５を閉
じておき、循環ポンプ８で加熱された温水を、熱交換器
２を通さずに直接機関１内の冷却水系路１２に循環させ
ておく。To explain the operation of the starting assist device of the present invention having the above configuration, when the engine 1 is stopped, the cooling water in the cooling water reserve tank 9 is heated to a constant temperature using the temperature sensor 22 and the heater 10.
For example, the temperature is maintained at about 40°C, the solenoid valves 6 and 7 of the bypass circuit 16 are opened, and the solenoid valve 5 on the engine 1 side is closed, and the hot water heated by the circulation pump 8 is transferred to the heat exchanger 2. The cooling water is directly circulated through the cooling water system path 12 in the engine 1 without passing through the cooling water.
以上の状態を保つことによって、機関１の始動時のアル
コール燃料の気化が容易になり、始動可能となるが、機
関１の始動後の機関１内の冷却水の温度が、例えば約５
０℃の所定温度を越えた時点で、電磁弁５を開けること
によって、機関１本来の冷却水供給回路１３とバイパス
回路１６との両方で機関１の冷却水系路１２に冷却水を
循環させる。By maintaining the above conditions, the alcohol fuel can be easily vaporized when the engine 1 is started, and the engine can be started.
When the predetermined temperature of 0° C. is exceeded, by opening the solenoid valve 5, cooling water is circulated through the cooling water system path 12 of the engine 1 through both the cooling water supply circuit 13 and the bypass circuit 16 that are original to the engine 1.
更に、上記の状態がすすみ、冷却水の温度が、例えば約
６０℃の次の所定温度以上に到着した時点で、バイパス
回路１６の電磁弁６，７を閉じ、ヒータ１０及び循環ポ
ンプ８を停止することで、冷却水は機関１本来の冷却水
供給回路１３で循環し、サーモスタット切換弁４によっ
て冷却水の温度を、例えば７５℃で一定に保つことにな
る。Furthermore, when the above-mentioned condition progresses and the temperature of the cooling water reaches the next predetermined temperature of, for example, about 60° C., the solenoid valves 6 and 7 of the bypass circuit 16 are closed, and the heater 10 and circulation pump 8 are stopped. By doing so, the cooling water is circulated in the original cooling water supply circuit 13 of the engine 1, and the temperature of the cooling water is kept constant at, for example, 75° C. by the thermostatic switching valve 4.
即ち、始動を終了し、機関１に負荷投入後は、冷却水の
バイパス回路１６を遮断し、機関ｌの正規の冷却水供給
回路１３内の冷却水を循環させるように制御装置が機能
しており、その制御のフローチャートを第２図に示して
いる。That is, after finishing the start and applying a load to the engine 1, the control device functions to shut off the cooling water bypass circuit 16 and circulate the cooling water in the regular cooling water supply circuit 13 of the engine 1. A flowchart of the control is shown in FIG.
従って、本発明の始動補助装置をアルコール燃料を使用
する火花点火式内燃機関に適用すれば、機関停止時に供
給された温水により機関は一定温度に保たれているので
、その始動時にアルコール燃料が吸気ポート シリンダ
ヘッド。Therefore, if the starting assist device of the present invention is applied to a spark-ignition internal combustion engine that uses alcohol fuel, the engine will be kept at a constant temperature by the hot water supplied when the engine is stopped, and the alcohol fuel will be injected into the intake air when the engine is started. port cylinder head.
ライナ壁面及びマニホールド等から気化熱を受けること
ができ、気化しやすくなり、その始動が容易になるとい
う効果がある。Heat of vaporization can be received from the liner wall surface, manifold, etc., making vaporization easier and starting the process easier.
その結果、外気温度の低い状態でも始動可能となり、ア
ルコール燃料使用を可能にし、経済的な運転ができる。As a result, the engine can be started even at low outside temperatures, allowing the use of alcohol fuel and enabling economical operation.
第１図は本発明の一実施例における火花点火式内燃機関
の始動補助装置の概略システム図、第２図は第１図の始
動補助装置の制御フローチャート図である。
１・・・機関、２・・・熱交換器、５，６．７・・・電
磁弁、８・・・循環ポンプ（電気式）、９・・・冷却水
予備タンク、１０・・・ヒータ、１２・・・冷却水系路
、１３・・・冷却水供給回路、１６・・・バイパス回路
、２２・・・水温センサ、３１・・・入力インターフェ
イス、３２・・・制御部、３３・・・出力インターフェ
イス。FIG. 1 is a schematic system diagram of a starting assist device for a spark ignition internal combustion engine according to an embodiment of the present invention, and FIG. 2 is a control flowchart of the starting assist device shown in FIG. 1... Engine, 2... Heat exchanger, 5, 6.7... Solenoid valve, 8... Circulation pump (electric type), 9... Cooling water reserve tank, 10... Heater , 12... Cooling water system path, 13... Cooling water supply circuit, 16... Bypass circuit, 22... Water temperature sensor, 31... Input interface, 32... Control unit, 33... Output interface.
Claims (1)
路に連通可能に設けた火花点火式内燃機関において、冷
却水温を一定に保持可能なヒータを装備した冷却水予備
タンクを設け、その冷却水予備タンクと機関内の冷却水
系路との間に冷却水を循環可能なバイパス回路を設ける
と共に、機関停止時及び始動時に該バイパス回路のみを
機関内の冷却水系路に連通し、機関始動後その冷却水が
所定温度を越えた時点で上記バイパス回路及び冷却水供
給回路を機関内の冷却水系路に連通し、更に上記の冷却
水が次の所定温度以上に到達後は冷却水供給回路のみを
機関内の冷却水系路に連通するような制御装置を設けた
ことを特徴とする火花点火式内燃機関の始動補助装置。In a spark ignition internal combustion engine in which a cooling water supply circuit with a heat exchanger is provided so as to be able to communicate with a cooling water system path within the engine, a cooling water reserve tank equipped with a heater capable of maintaining a constant cooling water temperature is provided, A bypass circuit that can circulate cooling water is provided between the cooling water reserve tank and the cooling water system path inside the engine, and when the engine is stopped and started, only the bypass circuit is connected to the cooling water system path inside the engine. After startup, when the cooling water exceeds a predetermined temperature, the bypass circuit and the cooling water supply circuit are connected to the cooling water system path in the engine, and when the cooling water reaches the next predetermined temperature or higher, the cooling water is supplied. 1. A starting assist device for a spark ignition internal combustion engine, comprising a control device that communicates only a circuit with a cooling water system path within the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16296285A JPS6226374A (en) | 1985-07-25 | 1985-07-25 | Start assisting device for spark ignition type internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16296285A JPS6226374A (en) | 1985-07-25 | 1985-07-25 | Start assisting device for spark ignition type internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6226374A true JPS6226374A (en) | 1987-02-04 |
Family
ID=15764590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16296285A Pending JPS6226374A (en) | 1985-07-25 | 1985-07-25 | Start assisting device for spark ignition type internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6226374A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090218A (en) * | 2001-09-17 | 2003-03-28 | Denso Corp | Vehicular regenerative tank device |
| FR2921125A3 (en) * | 2007-09-14 | 2009-03-20 | Renault Sas | Preheating device for improving cold operation of heat engine in car, has heating units maintaining cooling fluid at temperature after stopping heat engine, where temperature is near standard operating temperature of heat engine |
| FR3031139A1 (en) * | 2014-12-29 | 2016-07-01 | Soc De Motorisations Aeronautiques | METHOD FOR CONTROLLING THE LUBRICATING OIL TEMPERATURE OF AN ENGINE |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471240A (en) * | 1977-11-16 | 1979-06-07 | Hitachi Ltd | Enging heat retainer |
-
1985
- 1985-07-25 JP JP16296285A patent/JPS6226374A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471240A (en) * | 1977-11-16 | 1979-06-07 | Hitachi Ltd | Enging heat retainer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090218A (en) * | 2001-09-17 | 2003-03-28 | Denso Corp | Vehicular regenerative tank device |
| JP4492015B2 (en) * | 2001-09-17 | 2010-06-30 | 株式会社デンソー | Heat storage tank device for vehicles |
| FR2921125A3 (en) * | 2007-09-14 | 2009-03-20 | Renault Sas | Preheating device for improving cold operation of heat engine in car, has heating units maintaining cooling fluid at temperature after stopping heat engine, where temperature is near standard operating temperature of heat engine |
| FR3031139A1 (en) * | 2014-12-29 | 2016-07-01 | Soc De Motorisations Aeronautiques | METHOD FOR CONTROLLING THE LUBRICATING OIL TEMPERATURE OF AN ENGINE |
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