JPS5870060A - Preheating heater control device - Google Patents
Preheating heater control deviceInfo
- Publication number
- JPS5870060A JPS5870060A JP16708181A JP16708181A JPS5870060A JP S5870060 A JPS5870060 A JP S5870060A JP 16708181 A JP16708181 A JP 16708181A JP 16708181 A JP16708181 A JP 16708181A JP S5870060 A JPS5870060 A JP S5870060A
- Authority
- JP
- Japan
- Prior art keywords
- glow plug
- voltage
- preheating heater
- temperature
- preheating
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
- F02P19/022—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls using intermittent current supply
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feedback Control In General (AREA)
- Control Of Temperature (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明にディーゼルエン、ジンの寒冷時における始動補
助を行なう予熱用ヒータの制御装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a preheating heater that assists in starting a diesel engine when the engine is cold.
ディーゼルエンジンの予熱用ヒータには一般にグロープ
ラグが用いられ、予熱時には、早く温度を上昇させるた
めに急速に加熱し、その後所要温度を保つような制御が
行われる。A glow plug is generally used as a preheating heater for a diesel engine, and during preheating, it is heated rapidly to quickly raise the temperature, and then controlled to maintain the desired temperature.
このような急速予熱の制御方法は、従来から種種提案さ
れてきたが、これらはすべて定格以上の電圧を加えて立
上りを良くするとともに、グロープラグが溶断しないよ
うに、グロープラグの抵抗値変化から等動的に温度を検
出して制御するものであった。そのため、温度に対する
抵抗値の変化率の大きい材料（例えばＮｉ、ｐｅ−Ｎｉ
）でグロープラグを作る必要があった。Various methods of controlling rapid preheating have been proposed in the past, but all of these methods apply a voltage higher than the rated voltage to improve the start-up, and also prevent the glow plug from melting due to changes in the resistance value of the glow plug. It was designed to detect and control temperature isodynamically. Therefore, materials with a large rate of change in resistance with respect to temperature (for example, Ni, pe-Ni
) I needed to make a glow plug.
ところが、一般的にグロープラグの維持すべき温度範囲
では、温度に対する抵抗変化率に小さく、温度検出精度
は悪くなり、適確な制御が困難であった。また前記のよ
うな抵抗変化率の大きい材料に、耐久性の点で抵抗変化
率の小さいＮ ｉ −Ｃｒなどに劣り問題となっていた
。さらに急速予熱後グロープラグが一定温度に上昇した
後も、その温度を維持するため、ドロッピング抵抗でグ
ロープラク印加電圧を定格まで下げてグロープラグの溶
断を防ぐとともに一定温度を保つようにしているが、こ
のドロップ用抵抗での損失が大きく経済性から問題とな
っていた。However, in general, within the temperature range that the glow plug should maintain, the rate of change in resistance with respect to temperature is small, the temperature detection accuracy is poor, and accurate control is difficult. In addition, the durability of the material having a large resistance change rate is inferior to that of Ni-Cr, which has a small resistance change rate, which has caused problems. Furthermore, even after the glow plug reaches a certain temperature after rapid preheating, in order to maintain that temperature, a dropping resistor is used to reduce the voltage applied to the glow plug to the rated value to prevent the glow plug from blowing out and to maintain a constant temperature. This drop resistor has a large loss, which has been a problem from an economic standpoint.
本発明の目的は、上記した従来技術の欠点を除去し、耐
久性の優れたグロープラグを用いてその急速予熱及びそ
の安定予熱を正確に行え、かつ経済性の面でも効率のよ
い予熱ヒータ制御装置を提供するにある。An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to accurately perform rapid preheating and stable preheating using a highly durable glow plug, and to control a preheating heater that is economically efficient. We are in the process of providing equipment.
本発明の装置は、耐久性の良い材料のグロープラグの温
度に対する抵抗変化率が制御対象とする範囲では十分小
さく、従ってグロープラグの発熱量がその印加電圧の２
乗に比例することに着目し、グロープラグへの印加電圧
からその発熱量を算出し、この値によってグロープラグ
への電力供給をオンオフ制御するようにしたことを特徴
とするものである。即ち、まず、グロープラグの定格を
バッテリ電圧の５０〜８０％に設定し、バッテリ電圧の
１００％を印加してグロープラグの温度を急速に立上げ
る。このため、グロープラグより提供される熱量は急速
に増加する。一方、温度に対して抵抗値がほとんど変化
しない材料、例えばＮｌ−Ｃｒを用いたグロープラグで
は、グロープラグからの発熱量は、印加電圧の２乗を定
数（抵抗値）で割った入力電力を検出し、これを時間に
よって積分していけば求められる。今、グロープラグへ
の印加電圧’ｅ−Ｖａ、予熱所要時間（ｉｌ−１とする
と１発熱量Ｑは次のように求まる。In the device of the present invention, the rate of change in resistance with respect to temperature of the glow plug made of a durable material is sufficiently small within the range to be controlled, so that the amount of heat generated by the glow plug is 2 times that of the applied voltage.
The present invention is characterized in that the amount of heat generated by the glow plug is calculated from the voltage applied to the glow plug, and the power supply to the glow plug is controlled on and off based on this value. That is, first, the rating of the glow plug is set to 50 to 80% of the battery voltage, and 100% of the battery voltage is applied to rapidly raise the temperature of the glow plug. Therefore, the amount of heat provided by the glow plug increases rapidly. On the other hand, in a glow plug made of a material whose resistance value hardly changes with temperature, for example Nl-Cr, the amount of heat generated from the glow plug is calculated by dividing the input power by dividing the square of the applied voltage by a constant (resistance value). It can be found by detecting and integrating this over time. Now, assuming that the voltage applied to the glow plug is 'e-Va' and the required preheating time (il-1), the amount of heat generated per unit Q is determined as follows.
Ｑ二ＶＧ２／Ｒ・を
従って、このＶｃから算出したＱと基準値Ｑ。を比較し
、Ｑ≧Ｑ、ｏ Ｋなった時にグロープラグへの電圧印加
をやめ、一定時間経過してから再び電圧Ｖａを加える。Q2VG2/R. Therefore, Q and reference value Q calculated from this Vc. When Q≧Q, o K, the voltage application to the glow plug is stopped, and after a certain period of time has elapsed, the voltage Va is applied again.
この動作をくり返すことによってグロープラグの最適な
発熱量を維持するものである。By repeating this operation, the optimum heat generation amount of the glow plug is maintained.
以下、本発明を実施例により詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to Examples.
第１図は本発明の一実施し１１を示すものであり、第２
図はその動作説明図である。まずキースイッチ２を図示
のようにｔ＝Ｑでオンすることにより、トランジスタＴ
Ｒ１ｉｄオン状態となり、リレー励磁コイル４ａに電流
が流れ、リレー接点４ｂにオン状態とな、リグローブラ
グ５にはバッテリー１の電圧がそのまま印加される。従
ってグロープラグの消費電力ＷａＪｒＸ第２図に示すよ
うに急速に立上る。FIG. 1 shows one embodiment 11 of the present invention, and FIG.
The figure is an explanatory diagram of the operation. First, by turning on the key switch 2 at t=Q as shown in the figure, the transistor T
R1id is turned on, a current flows through the relay excitation coil 4a, the relay contact 4b is turned on, and the voltage of the battery 1 is directly applied to the regroove plug 5. Therefore, the power consumption WaJrX of the glow plug rises rapidly as shown in FIG.
一万、グロープラグ５への印加電圧Ｖ ａ ｎ 、抵抗
Ｒ１，Ｒ２により分圧され、２乗演算器３で２乗され、
）グロー消費電力ＷＧに比例した電圧、を得る。これを
抵抗Ｒ８〜Ｒ５、コンデンサーＣＩ、オペアンプＯＰで
構成される積分器に入力して時間積分することにより発
熱量に比例した電圧Ｑを得、ダイオードＤｒ ｋ介して
比較器ＣＯＭＰ１のマイナス側入力に加える。この比較
器ＣＯＭＰＩのプラス側入力には、抵抗器Ｒ１，とツェ
ナーダイオードＺＤで作られた定電圧ｖ２抵抗熱量に比
例した積分器出力Ｑが増大してゆき、時刻ｔ、でＱ、＝
Ｑ、となると、比較器ＣＯＭＰＩの出力に０となシ、抵
抗Ｒ０、ダイオードＤ２全通してトランジスタＴＲ，が
オフされる。これによってリレー接点４ｂｉ開放されグ
ロープラグ５への通電は停止される。10,000, the voltage V an applied to the glow plug 5 is divided by the resistors R1 and R2, and squared by the square calculator 3,
) Obtain a voltage proportional to the glow power consumption WG. By inputting this to an integrator consisting of resistors R8 to R5, capacitor CI, and operational amplifier OP and integrating it over time, a voltage Q proportional to the amount of heat generated is obtained, which is then input to the negative side input of comparator COMP1 via diode Drk. Add. At the positive input of this comparator COMPI, the integrator output Q, which is proportional to the constant voltage v2 created by the resistor R1 and the Zener diode ZD and the amount of resistance heat, increases, and at time t, Q, =
Q, the output of the comparator COMPI becomes 0, and the transistor TR is turned off through the resistor R0 and diode D2. As a result, the relay contact 4bi is opened and the supply of electricity to the glow plug 5 is stopped.
更に〜 トランジスタＴＲ１がオフになると同時にコン
デンサＣ２、抵抗Ｒ１゜、ダイオードＤ３より構成され
る微分回路により、トランジスタＴＲ２がコンデンサＣ
３と抵抗Ｒ１゜で定まる時定数により決定される時間（
第２図の’ｏｆｆ）だけオンとなシ、トランジスタＴＲ
１のベースは引込まれてオフ状態を維持する。ｊ＝＝ｔ
、がらｔ。ｆｆの時間が経過してトランジスタＴＲ２が
オフすると、トランジスタＴＲ１は再びオンしくを二’
２）でグロープラグが加熱され、以下第２図のようにオ
ンオフ制御が行われる。従ってこのオンオフ時間の設定
値により、平均的なグロープラグの加熱時間を最適な値
になるようにしておけば、グロープラグ溶断防止のため
の特別な回路を設ける必要はない。Furthermore, at the same time as the transistor TR1 turns off, the differentiating circuit composed of the capacitor C2, the resistor R1°, and the diode D3 turns the transistor TR2 off the capacitor C.
3 and the time constant determined by the resistance R1° (
'off) in Figure 2 is on, transistor TR
The base of No. 1 is retracted and remains off. j==t
, Gara t. When the time ff has elapsed and the transistor TR2 is turned off, the transistor TR1 is turned on again.
In step 2), the glow plug is heated and on/off control is performed as shown in FIG. Therefore, if the average heating time of the glow plug is set to an optimum value by the set value of the on-off time, there is no need to provide a special circuit for preventing the glow plug from blowing out.
この実施例によれば、耐久性のよいグロープラグを用い
て〜熱量による正確な温度制御が行え、かつ従来のよう
なドロッピング抵抗も不要で経済性の面でも改善ができ
る。According to this embodiment, accurate temperature control can be performed using a highly durable glow plug based on the amount of heat, and there is no need for dropping resistance as in the conventional case, resulting in an improvement in economical efficiency.
第３図に、第１図の実施例の比較器ＣＯＭ’ＰＬの出力
部分に、抵抗Ｒ１３＠ Ｒ１４、比較器ＣＯＭＰ２、ダ
イオードＤ４及びサーミスタＴ Ｈｌよりなるタイマの
出力を接続することにより、温度に依存したアフタグロ
ーの機能を持たせ、白煙の防止、安定な回転持続などの
効果が得られるようにしたものである。In FIG. 3, by connecting the output of a timer consisting of a resistor R13@R14, a comparator COMP2, a diode D4, and a thermistor THL to the output part of the comparator COM'PL in the embodiment shown in FIG. It has a dependent afterglow function, and achieves effects such as preventing white smoke and maintaining stable rotation.
また、第４図は、第１図の実施例で、基準電圧Ｑ、ｏを
設定する抵抗ｎ７にサーミスタＴＨ２とした場合で、こ
のようにすれば、°外気温に依存した適確な熱量制御が
可能となる。Moreover, FIG. 4 shows a case where the thermistor TH2 is used as the resistor n7 for setting the reference voltages Q and o in the embodiment shown in FIG. becomes possible.
なお、本発明に、直噴式ディーゼルエンジン予熱用イン
テークヒータに適用しても、同様の効果を得ることがで
きる。Note that similar effects can be obtained even when the present invention is applied to an intake heater for preheating a direct injection diesel engine.
以上の説明から明らかなように、本発明によれ□ ば
、簡単で経済的な構成の回路により、グロープラグの正
確な温度制御が性能と、なり、グロープラグの寿命を長
くシ、かつ確実なディージエンジンの始動を行えるとい
う効果がある。As is clear from the above description, according to the present invention, accurate temperature control of the glow plug can be achieved through a circuit with a simple and economical configuration, and the life of the glow plug can be extended and ensured. This has the effect of starting the digi engine.
第１図は九本発明の一実施例を示す図、第２図は第１図
の実施Ｉ’１１の動作説明図、第３図及び第４図はそれ
ぞれ他の実施例における追加、変更部分を示した図であ
る。
３・・・２乗演算器、４ａ・・・励磁コイル、４ｂ・・
・リレー接点、訃・・グロープラグ、ｏＰ・・・オペア
ンプ、ＣＯＭＰＩ、、、ＣＯＭＰ２・・・コンパレータ
、ＴＲ。
〜ＴＲ２・・・トランジスタ、ＴＨｌ、ＴＨ２・・・サ
ー第３０
も４０FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of implementation I'11 of FIG. 1, and FIGS. 3 and 4 are additions and changes in other embodiments, respectively. FIG. 3...Squaring calculator, 4a...Exciting coil, 4b...
・Relay contact, ... glow plug, oP... operational amplifier, COMPI, COMP2... comparator, TR. ~TR2...Transistor, THL, TH2...Sir No. 30 Also 40
Claims (1)
と、上記供給電圧を２乗して時間積分することによシ予
熱ヒータへの供給電力を検出する第２の手段と、該第２
の手段に上り検出された上記供給電力が予め定められた
基準値をこえた時に予め定められた時間だけ上記供給電
圧をオフとした後再び該供給電圧をオンとするように上
記第１の手段を制御する第３の手段とから構成したこと
を特徴とする予熱ヒータ制御装置。1. a first means for turning on and off the voltage supplied to the preheating heater; a second means for detecting the power supplied to the preheating heater by squaring the supply voltage and integrating it over time;
When the supplied power detected by the means exceeds a predetermined reference value, the first means turns off the supply voltage for a predetermined time and then turns on the supply voltage again. and third means for controlling the preheating heater control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16708181A JPS5870060A (en) | 1981-10-21 | 1981-10-21 | Preheating heater control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16708181A JPS5870060A (en) | 1981-10-21 | 1981-10-21 | Preheating heater control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5870060A true JPS5870060A (en) | 1983-04-26 |
Family
ID=15843044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16708181A Pending JPS5870060A (en) | 1981-10-21 | 1981-10-21 | Preheating heater control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5870060A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60126702A (en) * | 1983-12-13 | 1985-07-06 | Taniguchi Seisakusho:Kk | Automatic liquid temperature regulator |
| EP0209968A1 (en) * | 1985-05-24 | 1987-01-28 | Wellman Microtechnology Ltd. | Engine preheat controller |
| EP2113656A1 (en) * | 2008-04-29 | 2009-11-04 | GM Global Technology Operations, Inc. | A method and an apparatus for controlling glow plugs in a diesel engine, particularly for motor-vehicles |
-
1981
- 1981-10-21 JP JP16708181A patent/JPS5870060A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60126702A (en) * | 1983-12-13 | 1985-07-06 | Taniguchi Seisakusho:Kk | Automatic liquid temperature regulator |
| EP0209968A1 (en) * | 1985-05-24 | 1987-01-28 | Wellman Microtechnology Ltd. | Engine preheat controller |
| EP2113656A1 (en) * | 2008-04-29 | 2009-11-04 | GM Global Technology Operations, Inc. | A method and an apparatus for controlling glow plugs in a diesel engine, particularly for motor-vehicles |
| US8050010B2 (en) | 2008-04-29 | 2011-11-01 | GM Global Technology Operations LLC | Method and an apparatus for controlling glow plugs in a diesel engine, particularly for motor-vehicles |
| CN101571092B (en) | 2008-04-29 | 2012-06-20 | Gm全球科技运作股份有限公司 | A method and an apparatus for controlling glow plugs in a diesel engine |
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