JPS6215744B2 - - Google Patents
Info
- Publication number
- JPS6215744B2 JPS6215744B2 JP57228607A JP22860782A JPS6215744B2 JP S6215744 B2 JPS6215744 B2 JP S6215744B2 JP 57228607 A JP57228607 A JP 57228607A JP 22860782 A JP22860782 A JP 22860782A JP S6215744 B2 JPS6215744 B2 JP S6215744B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- diesel
- switching
- fuel
- governor
- 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.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 35
- 239000002283 diesel fuel Substances 0.000 claims description 15
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0607—Control of components of the fuel supply system to adjust the fuel mass or volume flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
- F02D19/105—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous operating in a special mode, e.g. in a liquid fuel only mode for starting
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】
本発明は、デイーゼル燃料運転とガス燃料運転
の切換えを安定して行なうことのできるガス・デ
イーゼル二元燃料機関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 gas/diesel dual fuel engine that can stably switch between diesel fuel operation and gas fuel operation.
デイーゼル機関にガス燃料供給機構を付加した
ガス・デイーゼル二元燃料機関においては、デイ
ーゼル側とガス側にそれぞれガバナ装置を設け、
使用燃料に応じて対応する側のガバナ装置を作動
させるように構成されているが、機関の運転中に
使用燃料を切換えた場合には回転速度が変動しや
すい欠点がある。これは、デイーゼル燃料運転か
らガス燃料運転への切換時には、ガスがガス燃料
調整弁からシリンダ内に入るまでに時間を要する
ために回転速度が低下し、逆にガス燃料運転から
デイーゼル燃料運転への切換時には、ガス燃料調
整弁からシリンダに至るまでの間に残つていたガ
スが燃焼するために回転速度が上昇するためであ
る。 In a gas/diesel dual fuel engine that has a gas fuel supply mechanism added to the diesel engine, a governor device is installed on the diesel side and the gas side, respectively.
Although it is configured to operate the governor device on the corresponding side depending on the fuel used, there is a drawback that the rotational speed tends to fluctuate when the fuel used is changed while the engine is operating. This is because when switching from diesel fuel operation to gas fuel operation, it takes time for gas to enter the cylinder from the gas fuel adjustment valve, so the rotation speed decreases, and conversely, when switching from gas fuel operation to diesel fuel operation, the rotation speed decreases. This is because at the time of switching, the gas remaining between the gas fuel adjustment valve and the cylinder is combusted, resulting in an increase in rotational speed.
本発明はこの点に着目し、使用燃料切換時の速
度変動を少なくすることを目的としてなされたも
のであり、デイーゼル側とガス側にそれぞれ電子
ガバナ装置を設けるとともに、各電子ガバナ装置
に制御信号を供給し、且つガス遮断弁開閉信号を
出力するモード切換回路を設け、デイーゼル燃料
運転からガス燃料運転への切換時には、ガス遮断
弁を開くと同時にガス側をガバナ動作に切換える
とともに一定時間経過後にデイーゼル側をパイロ
ツト動作に切換え、ガス燃料運転からデイーゼル
燃料運転への切換時には、ガス遮断弁を閉じると
同時にガス側をガバナオフ動作に切換えるととも
に一定時間経過後にデイーゼル側をガバナ動作に
切換えるように構成したことを特徴としている。
すなわち、本発明においては、モード切換回路に
よつて各電子ガバナ装置を制御し、予め設定され
た一定時間だけ遅れてデイーゼル側の切換えを行
なうようにしており、デイーゼル燃料運転からガ
ス燃料運転への切換時には、ガス燃料が燃焼室に
入るまでデイーゼル側にガバナ動作をさせ、逆の
切換時には残つているガスが燃焼し終るまでデイ
ーゼル側のパイロツト動作を継続させるため、切
換時の回転速度の変動を少なくすることができる
のである。 The present invention has focused on this point and has been made with the aim of reducing speed fluctuations when switching the fuel used.In addition to providing electronic governor devices on the diesel side and the gas side, control signals are sent to each electronic governor device. A mode switching circuit is provided that supplies gas and outputs a gas cutoff valve opening/closing signal.When switching from diesel fuel operation to gas fuel operation, the gas side is switched to governor operation at the same time as the gas cutoff valve is opened, and after a certain period of time has elapsed, The diesel side is switched to pilot operation, and when switching from gas fuel operation to diesel fuel operation, the gas side is switched to governor off operation at the same time as the gas cutoff valve is closed, and the diesel side is switched to governor operation after a certain period of time has passed. It is characterized by
That is, in the present invention, each electronic governor device is controlled by a mode switching circuit, and the diesel side is switched after a preset certain period of time, thereby switching from diesel fuel operation to gas fuel operation. When switching, the diesel side is operated as a governor until the gas fuel enters the combustion chamber, and when switching in the opposite direction, the pilot operation on the diesel side is continued until the remaining gas has been burned, so fluctuations in rotational speed during switching are controlled. It can be reduced.
以下、本発明の一実施例を第１図及び第２図に
より説明する。 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は概念系統図であり、１，１′は電子ガ
バナ装置、２はモード切換回路、３，３′は回転
速度設定器、４，４′はアクチユエータ、５は噴
射ポンプ、６はガス量調整弁、７，７′は回転速
度検出器、８はガス燃料供給路、９はガス遮断弁
である。電子ガバナ装置１はデイーゼル側の制御
用であつて、その出力によつてアクチユエータ４
を駆動し、電子ガバナ装置１′はガス側の制御用
であつて、その出力によつてアクチユエータ４′
を駆動する。アクチユエータ４，４′は電気的サ
ーボソレノイドアクチユエータであつて、アクチ
ユエータ４はデイーゼル燃料の噴射ポンプ５のコ
ントロールラツクに連結され、アクチユエータ
４′はガス燃料供給路８中に設けられたガス量調
整弁６に連結され、それぞれ電子ガバナ装置１，
１′の出力に応じて機関（図示せず）への燃料供
給を制御するものである。 Figure 1 is a conceptual system diagram, where 1 and 1' are electronic governor devices, 2 is a mode switching circuit, 3 and 3' are rotation speed setting devices, 4 and 4' are actuators, 5 is an injection pump, and 6 is a gas Reference numerals 7 and 7' are rotational speed detectors, 8 is a gas fuel supply path, and 9 is a gas cutoff valve. The electronic governor device 1 is for controlling the diesel side, and its output controls the actuator 4.
The electronic governor device 1' is for controlling the gas side, and its output drives the actuator 4'.
to drive. The actuators 4, 4' are electric servo solenoid actuators, the actuator 4 being connected to a control rack of a diesel fuel injection pump 5, and the actuator 4' being a gas quantity adjustment device provided in a gas fuel supply line 8. are connected to the valve 6, and are connected to the electronic governor device 1, respectively.
The fuel supply to the engine (not shown) is controlled according to the output of the engine 1'.
電子ガバナ装置１，１′は、それぞれ比較演算
回路１１，１１′、最低値選出回路１２，１２′、
アクチユエータ駆動回路１３，１３′を備えてお
り、比較演算回路１１，１１′は回転速度設定器
３，３′からの設定信号と、回転速度検出器７，
７′の検出信号をＦ／Ｖ変換器１４，１４′を介し
てそれぞれ入力され、回転速度の設定値と実測値
とを比較し、PID動作による制御出力１５，１
５′を出力する。最低値選出回路１２，１２′は比
較演算回路１１，１１′からの制御出力１５，１
５′と、モード切換回路２からの切換出力１６，
１６′とが入力され、各出力１５と１６及び１
５′と１６′を比較して低い方の出力を選択し、選
択した出力をアクチユエータ駆動回路１３，１
３′に送る。アクチユエータ駆動回路１３，１
３′は、最低値選出回路１２，１２′の出力をパル
ス幅変調増幅や電流制限等によつてアクチユエー
タ４，４′に適合した出力に変換し、アクチユエ
ータ４，４′を駆動して燃料供給量を制御する。 The electronic governor devices 1, 1' each include comparison calculation circuits 11, 11', minimum value selection circuits 12, 12',
It is equipped with actuator drive circuits 13 and 13', and comparison calculation circuits 11 and 11' receive setting signals from rotation speed setters 3 and 3', and rotation speed detectors 7 and 13'.
The detection signals of 7' are inputted through F/V converters 14 and 14', respectively, and the set value and actual measurement value of the rotation speed are compared, and control outputs 15 and 1 are generated by PID operation.
Outputs 5'. The lowest value selection circuits 12, 12' are the control outputs 15, 1 from the comparison calculation circuits 11, 11'.
5' and a switching output 16 from the mode switching circuit 2,
16' is input, and each output 15, 16 and 1
5' and 16' are compared, the lower output is selected, and the selected output is applied to the actuator drive circuits 13 and 1.
Send to 3'. Actuator drive circuit 13,1
3' converts the output of the lowest value selection circuit 12, 12' into an output suitable for the actuators 4, 4' by pulse width modulation amplification, current limiting, etc., and drives the actuators 4, 4' to supply fuel. Control quantity.
モード切換回路２は、前述したように最低値選
出回路１２，１２′に切換出力１６，１６′を供給
するほか、速度設定出力１７，１７′を回転速度
設定器３，３′に供給し、ガス遮断弁開閉信号１
８をガス遮断弁９に供給するものである。 The mode switching circuit 2 supplies the switching outputs 16, 16' to the lowest value selection circuits 12, 12' as described above, and also supplies speed setting outputs 17, 17' to the rotational speed setters 3, 3'. Gas cutoff valve open/close signal 1
8 is supplied to the gas cutoff valve 9.
次に動作を説明する。本装置における動作には
「ガバナ動作」「ポジシヨナ動作」「ガバナオフ動
作」の三種類があるので、全体の動作の前にこれ
らの各動作について説明する。 Next, the operation will be explained. There are three types of operations in this device: ``governor operation'', ``positioner operation'', and ``governor off operation'', so each of these operations will be explained before explaining the overall operation.
ガバナ動作においては、モード切換回路２から
出力される切換出力１６または１６′を調整範囲
の上限値である最高レベルに設定し、速度設定出
力１７または１７′を実際に得たい所定回転速度
に対応する所定レベルに設定する。これにより、
最高レベルの切換出力１６または１６′は最低値
選出回路１２，１２′で選出されることなく、そ
れより低いレベルにある比較演算回路１１，１
１′の制御出力１５，１５′が常に選出され、機関
回転速度を設定値に保とうとする通常のガバナ動
作が行なわれるのである。 In governor operation, the switching output 16 or 16' output from the mode switching circuit 2 is set to the highest level, which is the upper limit of the adjustment range, and the speed setting output 17 or 17' corresponds to the desired rotational speed. set to a predetermined level. This results in
The highest level switching output 16 or 16' is not selected by the lowest value selection circuit 12, 12', but is selected by the comparison calculation circuit 11, 1 at a lower level.
Control outputs 15 and 15' of 1' are always selected, and normal governor operation is performed to maintain the engine speed at the set value.
ポジシヨナ動作においては、切換出力１６また
は１６′はアクチユエータ４または４′を固定して
おきたいポジシヨンに見合うレベルに設定し、速
度設定出力１７または１７′は切換出力１６また
は１６′で設定されるポジシヨンを越える高レベ
ルに設定する。これにより、比較演算回路１１ま
たは１１′は常に燃料増を命令する高レベルの制
御出力１５，１５′を出し続けることになり、最
低値選出回路１２または１２′を制御出力１５，
１５′より低レベルの切換出力１６または１６′を
選出し、アクチユエータ４または４′が所定のポ
ジシヨンに保持されるのである。 In positioner operation, the switching output 16 or 16' is set at a level corresponding to the position in which the actuator 4 or 4' is desired to be fixed, and the speed setting output 17 or 17' is set at a level corresponding to the position set by the switching output 16 or 16'. Set to a high level exceeding . As a result, the comparison arithmetic circuit 11 or 11' always continues to output the high-level control output 15, 15' that commands an increase in fuel, and the lowest value selection circuit 12 or 12' outputs the control output 15, 15'.
A switching output 16 or 16' having a lower level than 15' is selected, and the actuator 4 or 4' is held in a predetermined position.
ガバナオフ動作においては、切換出力１６また
は１６′は燃料停止に見合う最低レベル、例えば
OV信号に設定する。これにより、比較演算回路
１１または１１′がいかなる制御出力１５，１
５′を発生しても、最低値選出回路１２または１
２′はこれをすべて無視して切換出力１６または
１６′を選出するから、アクチユエータ４または
４′は燃料停止状態に保持されるのである。 In governor-off operation, switching output 16 or 16' is set to the lowest level commensurate with fuel shutdown, e.g.
Set to OV signal. This allows the comparison calculation circuit 11 or 11' to output any control output 15, 1.
5', the lowest value selection circuit 12 or 1
Since actuator 2' ignores all this and selects switching output 16 or 16', actuator 4 or 4' is maintained in the fuel-dead state.
なお、各出力のレベルというのは、出力信号に
よつて指令されるレベルの意味であつて、アナロ
グ信号の場合は電圧の大小がそのまま適用される
が、信号の形式によつては必ずしも電圧の大小を
意味するとは限らない。 Note that the level of each output means the level commanded by the output signal, and in the case of analog signals, the magnitude of the voltage is applied as is, but depending on the signal format, the voltage does not necessarily vary. It doesn't necessarily mean size.
本装置は、上述のような三種類の動作をモード
切換回路２によつて選択的に行なうものであり、
次に全体の動作について述べる。第２図は各部の
動作状態と各出力信号のタイムチヤートである。 This device selectively performs the three types of operations described above using the mode switching circuit 2.
Next, the overall operation will be described. FIG. 2 shows the operating status of each part and a time chart of each output signal.
第２図の時刻t1においてデイーゼル燃料運転か
らガス燃料運転への切換えを行なうと、モード切
換回路２からガス遮断弁９の開閉信号１８が出力
されてガス遮断弁９が開き、同時に切換出力１
６′は最高レベルになり、速度設定出力１７′は所
定レベルになり、これによつて電子ガバナ装置
１′はガバナ動作に切換わる。一方、切換出力１
６は最高レベル、速度設定出力１７は所定レベル
のままであり、電子ガバナ装置１はガバナ動作を
継続している。 When switching from diesel fuel operation to gas fuel operation at time t 1 in FIG. 2, the mode switching circuit 2 outputs the open/close signal 18 for the gas cutoff valve 9, the gas cutoff valve 9 opens, and at the same time the switching output 1
6' becomes the highest level, and the speed setting output 17' becomes a predetermined level, thereby switching the electronic governor device 1' to governor operation. On the other hand, switching output 1
6 remains at the highest level, the speed setting output 17 remains at the predetermined level, and the electronic governor device 1 continues the governor operation.
ガス側が正常な動作に達するまでに要する時間
T1が経過して時刻t2になると、切換出力１６は低
レベルとなり、速度設定出力１７は高レベルとな
つて電子ガバナ装置１はポジシヨナ動作に切換わ
る。この動作においては、アクチユエータ４によ
つて噴射ポンプ５はガス燃料を燃焼室で着火させ
るのに必要な一定量のデイーゼル燃料をパイロツ
ト噴射するラツク位置にセツトされ、デイーゼル
側はポジシヨナ動作の一つの状態であるパイロツ
ト動作に保たれ、ガスモードへの切換えが終了す
る。 Time required for gas side to reach normal operation
When T 1 elapses and time t 2 arrives, the switching output 16 becomes a low level, the speed setting output 17 becomes a high level, and the electronic governor device 1 switches to positioner operation. In this operation, the actuator 4 sets the injection pump 5 to the easy position for pilot injecting a certain amount of diesel fuel necessary to ignite the gaseous fuel in the combustion chamber, and the diesel side is in one state of positioner operation. The pilot operation is then maintained, and the switch to gas mode is completed.
時刻t3においてガス燃料運転からデイーゼル燃
料運転への切換えを行なうと、開閉信号１８によ
りガス遮断弁９が閉じ、同時に切換出力１６′は
最低レベルになり、電子ガバナ装置１′はガバナ
オフ動作に切換わり、ガス量調整弁６は閉じる。
速度設定出力１７′のレベルは任意であり、所定
レベルのまま据え置かれていてもよい。なお、ガ
バナオフ動作はポジシヨナ動作の特殊な状態と考
えることができる。一方、切換出力１６は低レベ
ル、速度設定出力１７は高レベルのままであり、
デイーゼル側はパイロツト動作を継続している。 When switching from gas fuel operation to diesel fuel operation is performed at time t3 , the gas cutoff valve 9 is closed by the open/close signal 18, and at the same time, the switching output 16' becomes the lowest level, and the electronic governor device 1' switches to governor-off operation. Therefore, the gas amount adjustment valve 6 is closed.
The level of the speed setting output 17' is arbitrary and may be left at a predetermined level. Note that the governor-off operation can be considered as a special state of positioner operation. On the other hand, the switching output 16 remains at a low level and the speed setting output 17 remains at a high level.
The diesel side continues to operate as a pilot.
残つていたガスが燃焼してなくなるまでに要す
る時間T2が経過して時刻t4になると、切換出力１
６は最高レベルとなり、速度設定出力１７は所定
レベルとなつて電子ガバナ装置１はガバナ動作に
切換わり、デイーゼルモードへの切換えが終了す
る。 When the time T 2 required for the remaining gas to burn and disappear reaches time t 4 , the switching output 1
6 becomes the highest level, the speed setting output 17 becomes a predetermined level, the electronic governor device 1 switches to governor operation, and the switch to diesel mode is completed.
上記の時間T1，T2は予めモード切換試験を行
ない、回動変動が最も少なくなる値を選べばよ
く、モード切換回路２はこの時間T1，T2を設定
するためのタイマ回路と、各出力信号を発生する
ための信号発生回路を適宜組合せて構成されるも
のである。 The above-mentioned times T 1 and T 2 should be selected by performing a mode switching test in advance and selecting values that minimize rotational fluctuations, and the mode switching circuit 2 includes a timer circuit for setting these times T 1 and T 2 . It is constructed by appropriately combining signal generation circuits for generating each output signal.
このように、本発明はデイーゼル側をガス側よ
り一定のタイムラグを持たせて切換えることによ
り、燃料切換時の速度変動を少なくするものであ
るが、次のような若干の問題点がある。 As described above, the present invention reduces speed fluctuations during fuel switching by switching the diesel side with a certain time lag compared to the gas side, but there are some problems as follows.
すなわち、デイーゼル燃料運転からガス燃料運
転に切換える場合に、ガス側をガバナ動作させて
も、デイーゼル側がパイロツト動作に移つて回転
が落ちるまでガス側はほとんど動作せず、デイー
ゼル側がパイロツト動作に移ると同時に急激に動
作し始め、また逆の切換えの場合には、デイーゼ
ル側がパイロツト動作からガバナ動作に急に移る
ので急激に動作し始めるという現象が起こり、い
ずれの側への切換時においても回転速度の変動が
生じやすい傾向がある。 In other words, when switching from diesel fuel operation to gas fuel operation, even if the gas side is operated as a governor, the gas side will hardly operate until the diesel side shifts to pilot operation and the rotation drops, and at the same time as the diesel side shifts to pilot operation. In the case of sudden operation and reverse switching, the diesel side suddenly shifts from pilot operation to governor operation, causing a sudden start of operation, resulting in fluctuations in rotational speed when switching to either side. There is a tendency for this to occur.
これは、デイーゼル側は液体噴射であつて、噴
射量のわずかの変化でもそのまま速度変化として
表われ、PID制御の時定数は短かい。一方、ガス
側はガス量調整弁の特性とガス遮断弁からシリン
ダまでの配管の長さによつて、ガス量調整弁を操
作しても実際にシリンダ内に入るガス量の変化と
して表われるまでに時間がかかり、PID制御の時
定数を短かくすることができないためである。 This is because the diesel side uses liquid injection, and even a slight change in the amount of injection is directly reflected as a change in speed, and the time constant of PID control is short. On the gas side, on the other hand, depending on the characteristics of the gas volume adjustment valve and the length of the piping from the gas cutoff valve to the cylinder, even if the gas volume adjustment valve is operated, the amount of gas that actually enters the cylinder may change. This is because it takes time and the time constant of PID control cannot be shortened.
このため、例えばガス側からデイーゼル側への
切換時に、速度があまり低下しないうちにデイー
ゼル側をガバナ動作させると、敏感に動作するの
で大幅に回転がオーバーシユートしてしまうた
め、ある程度速度が低下した後に切換えればよい
のであるが、負荷、空気とガスの混合具合などに
よつて速度低下の割合いが異なり、最適のタイム
ラグを選定することは非常に困難である。 For this reason, for example, when switching from the gas side to the diesel side, if the diesel side is operated as a governor before the speed has decreased much, the speed will decrease to some extent because the operation is sensitive and the rotation will overshoot significantly. However, the rate of speed reduction varies depending on the load, the mixing condition of air and gas, etc., and it is extremely difficult to select the optimal time lag.
第３図は、このような問題点を解消するための
改良を施した変形例のタイムチヤートを示す。こ
こでは、デイーゼル側からガス側に切換える場合
に、速度設定出力１７′を所定レベルよりやや高
いレベルにして、ガス側をガバナ動作させてい
る。このため、実際の回転速度より設定速度が高
いのでアクチユエータ４′は徐々に全開方向に作
動し、ガスが燃焼室内に入つて回転速度が上昇す
る。一方、デイーゼル側のアクチユエータ４は所
定の速度に戻そうとして全閉方向に作動する。そ
して一定の時間T1の経過後、デイーゼル側をパ
イロツト動作にし、同時にガス側は所定の速度設
定レベルにおけるガバナ動作にするのである。 FIG. 3 shows a time chart of a modified example that has been improved to solve these problems. Here, when switching from the diesel side to the gas side, the speed setting output 17' is set to a level slightly higher than a predetermined level, and the gas side is operated as a governor. Therefore, since the set speed is higher than the actual rotation speed, the actuator 4' gradually operates in the fully open direction, gas enters the combustion chamber, and the rotation speed increases. On the other hand, the actuator 4 on the diesel side operates in the fully closed direction in an attempt to return to a predetermined speed. After a certain period of time T1 has elapsed, the diesel side is put into pilot operation, and at the same time, the gas side is put into governor operation at a predetermined speed setting level.
また、ガス側からデイーゼル側に切換える場合
に、ガス側の速度設定出力１７′を所定レベルよ
りやや低いレベルにする。このため、実際の回転
速度より設定速度が低い状態となるので、ガス側
はガス量調整弁６が全閉方向に作動しながら低レ
ベル設定のガバナ動作となる。そしてガス量調整
弁６から燃焼室までに残つたガスがほぼ燃焼し終
り、しかも低レベルの設定値より下がらないよう
な一定の時間T2の経過後にガス側をガバナオフ
動作に切換え、同時にデイーゼル側をガバナ動作
に切換えるのである。 Further, when switching from the gas side to the diesel side, the speed setting output 17' on the gas side is set to a level slightly lower than a predetermined level. For this reason, the set speed is lower than the actual rotational speed, and therefore, on the gas side, the gas amount adjustment valve 6 operates in the fully closed direction and performs a governor operation with a low level setting. Then, after the gas remaining between the gas amount adjustment valve 6 and the combustion chamber has almost finished burning and a certain time period T2 has elapsed during which the temperature does not fall below the low level set value, the gas side is switched to governor-off operation, and at the same time, the diesel side is switched to governor-off operation. is switched to governor operation.
従つて、いずれの側への切換時においても、ア
クチユエータ４及び４′の作動がゆるやかとな
り、急激な作動によつて回転速度に変動が生ずる
ことが少なくなるのである。なお、第４図はガス
側からデイーゼル側への切換時の速度変動の様子
を示すものであり、ａは第２図の制御による場
合、ｂは第３図の制御によるものである。 Therefore, when switching to either side, the actuators 4 and 4' operate slowly, and fluctuations in rotational speed due to sudden operations are less likely to occur. Note that FIG. 4 shows the state of speed fluctuation when switching from the gas side to the diesel side, where a shows the control shown in FIG. 2 and b shows the control shown in FIG. 3.
以上の説明から明らかなように、本発明はデイ
ーゼル燃料運転とガス燃料運転の相互の切換えを
機関の運転中に行なつた場合の速度変動を少なく
し、安定した切換えを行なうことができる利点が
あり、例えば発電機の原動機として使用した場合
に、発電機の出力を燃料切換時においてもほぼ一
定に保つことが可能となるのである。 As is clear from the above description, the present invention has the advantage of reducing speed fluctuations and stably switching between diesel fuel operation and gas fuel operation when switching between diesel fuel operation and gas fuel operation while the engine is running. For example, when used as a prime mover for a generator, the output of the generator can be kept almost constant even when switching fuels.
第１図は本発明の一実施例の概念系統図、第２
図は同上の動作説明のためのタイムチヤート、第
３図は同上の変形例のタイムチヤート、第４図は
切換時の回転変動の例を示す図である。
１，１′……電子ガバナ装置、２……モード切
換回路、３，３′……回転速度設定器、４，４′…
…アクチユエータ、５……噴射ポンプ、６……ガ
ス量調整弁、７，７′……回転速度検出器、９…
…ガス遮断弁、１１，１１′……比較演算回路、
１２，１２′……最低値選出回路、１３，１３′…
…アクチユエータ駆動回路、１５，１５′……制
御出力、１６，１６′……切換出力、１７，１
７′……速度設定出力、１８……ガス遮断弁開閉
信号。
Fig. 1 is a conceptual system diagram of one embodiment of the present invention;
FIG. 3 is a time chart for explaining the operation of the same as above, FIG. 3 is a time chart of a modification of the same as above, and FIG. 4 is a diagram showing an example of rotational fluctuation at the time of switching. 1, 1'... Electronic governor device, 2... Mode switching circuit, 3, 3'... Rotation speed setting device, 4, 4'...
... Actuator, 5 ... Injection pump, 6 ... Gas amount adjustment valve, 7, 7' ... Rotation speed detector, 9 ...
...Gas cutoff valve, 11, 11'...Comparison calculation circuit,
12, 12'...lowest value selection circuit, 13, 13'...
...actuator drive circuit, 15,15'...control output, 16,16'...switching output, 17,1
7'...Speed setting output, 18...Gas cutoff valve opening/closing signal.
Claims (1)
てなるガス・デイーゼル二元燃料機関において、 機関回転速度の設定値と実測値とを比較して回
転速度を設定値に一致させるように制御出力を出
す比較演算回路と、 比較演算回路の制御出力とモード切換回路の切
換出力とを比較して低い側の出力を選択する最低
値選出回路と、 最低値選出回路の出力に応じて燃料供給量を制
御するアクチユエータ駆動回路、 とを備えた電子ガバナ装置をデイーゼル側とガス
側にそれぞれ設けるとともに、 各電子ガバナ装置に対して速度設定出力と切換
出力とをレベルを変えながら選択的に供給すると
ともにガス遮断弁開閉信号を出力するモード切換
回路を設け、 デイーゼル燃料運転からガス燃料運転への切換
時には、ガス遮断弁を開くと同時にガス側をガバ
ナ動作に切換えるとともに一定時間経過後にデイ
ーゼル側をパイロツト動作に切換え、ガス燃料運
転からデイーゼル燃料運転への切換時には、ガス
遮断弁を閉じると同時にガス側をガバナオフ動作
に切換えるとともに一定時間経過後にデイーゼル
側をガバナ動作に切換えることを特徴とするガ
ス・デイーゼル二元燃料機関の制御装置。[Claims] 1. In a gas/diesel dual fuel engine which is a diesel engine with a gas fuel supply mechanism added, a set value of the engine rotation speed is compared with an actual value to make the rotation speed match the set value. A comparison calculation circuit that outputs a control output as shown in FIG. An electronic governor device equipped with an actuator drive circuit that controls the amount of fuel supplied is provided on the diesel side and the gas side, respectively, and the speed setting output and switching output can be selectively controlled by changing the level for each electronic governor device. A mode switching circuit is provided that outputs a gas cutoff valve open/close signal. When switching from diesel fuel operation to gas fuel operation, the gas side is switched to governor operation at the same time as the gas cutoff valve is opened, and after a certain period of time, the diesel When switching from gas fuel operation to diesel fuel operation, the gas side is switched to governor off operation at the same time as the gas cutoff valve is closed, and the diesel side is switched to governor operation after a certain period of time has elapsed. Control device for gas/diesel dual fuel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57228607A JPS59122749A (en) | 1982-12-29 | 1982-12-29 | Control device for gas and diesel two-kind fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57228607A JPS59122749A (en) | 1982-12-29 | 1982-12-29 | Control device for gas and diesel two-kind fuel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59122749A JPS59122749A (en) | 1984-07-16 |
| JPS6215744B2 true JPS6215744B2 (en) | 1987-04-09 |
Family
ID=16878995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57228607A Granted JPS59122749A (en) | 1982-12-29 | 1982-12-29 | Control device for gas and diesel two-kind fuel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59122749A (en) |
-
1982
- 1982-12-29 JP JP57228607A patent/JPS59122749A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59122749A (en) | 1984-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6752135B2 (en) | Apparatus for air/fuel ratio control | |
| US4856475A (en) | Rotational frequency control apparatus of internal combustion engine | |
| JPS6215744B2 (en) | ||
| KR900700740A (en) | Method and system for adjusting lambda value of air / fuel mixture | |
| JPS6215745B2 (en) | ||
| JP3706978B2 (en) | Drive control device for electromagnetic fuel injection valve for gaseous fuel | |
| JPH11153245A (en) | Method for driving solenoid valve | |
| JP2877498B2 (en) | Control device for combustion device | |
| JP2006166551A (en) | Method and apparatus for supplying generated power from a generator | |
| JPH0252920A (en) | Exhaust fan rotating speed controller for hot water supply apparatus | |
| JP2877503B2 (en) | Combustion equipment | |
| SU1539356A1 (en) | System for automatic control of as-turbine plant | |
| JP3056968B2 (en) | Combustion equipment | |
| JPH0252927A (en) | Apparatus for controlling revolutional speed of fan | |
| JP2596874B2 (en) | Automatic fuel switching control for multi-fuel engines | |
| SU1016772A1 (en) | Program adjustment device | |
| JPH02207153A (en) | Control device for dual-fuel diesel engine | |
| JP3418475B2 (en) | Combustion equipment | |
| JPH0246774B2 (en) | ||
| JPH033804Y2 (en) | ||
| JPS621398Y2 (en) | ||
| JP3793911B2 (en) | Combustion air flow rate adjusting mechanism control method and apparatus for gas turbine combustor | |
| JPS621396Y2 (en) | ||
| JPS63198770A (en) | Injection rate control device for fuel injection system | |
| JP2612023B2 (en) | Gas turbine control device |