JPH0437260Y2 - - Google Patents
Info
- Publication number
- JPH0437260Y2 JPH0437260Y2 JP1986012585U JP1258586U JPH0437260Y2 JP H0437260 Y2 JPH0437260 Y2 JP H0437260Y2 JP 1986012585 U JP1986012585 U JP 1986012585U JP 1258586 U JP1258586 U JP 1258586U JP H0437260 Y2 JPH0437260 Y2 JP H0437260Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- temperature
- cooling
- passage
- heating
- 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 125
- 238000001514 detection method Methods 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002828 fuel tank Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Landscapes
- Testing Of Engines (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、内燃機関試験用の燃料温度調整装置
に係り、特に、デイーゼル機関の燃料を試験に適
した温度に調整する内燃機関試験用の燃料温度調
整装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a fuel temperature adjustment device for internal combustion engine testing, and in particular, to a fuel temperature adjustment device for internal combustion engine testing that adjusts the fuel of a diesel engine to a temperature suitable for testing. This invention relates to a fuel temperature adjustment device.
デイーゼル機関の出力試験などを行なうときに
は、燃料の温度が一定の温度に調整されないとエ
ンジン出力試験を最適な状態で行なえないところ
から、実開昭57−156069号公報に記載されている
ように、燃料の温度を調整することがなされてい
る。即ち、燃料タンクから燃料噴射ポンプに至る
燃料通路の一部に電気ヒータを設けると共に温度
に応じて機関冷却温水と冷却手段からの冷水とを
選択的に導入する加熱冷却手段を備えた装置によ
つて燃料の温度を調整することがなされている。
When performing an output test of a diesel engine, the engine output test cannot be performed in the optimum condition unless the fuel temperature is adjusted to a constant temperature. Adjustments have been made to the temperature of the fuel. That is, an electric heater is provided in a part of the fuel passage leading from the fuel tank to the fuel injection pump, and a heating/cooling means is used to selectively introduce engine cooling hot water and cold water from the cooling means depending on the temperature. The temperature of the fuel is adjusted accordingly.
しかしながら、従来の装置においては単に加熱
冷却手段と電熱ヒータによつて燃料の温度を調整
するように構成されているため、燃料温度を精度
良く調整すること及び広範囲で異なる燃料設定温
度での試験が困難であつた。
However, since conventional devices are configured to simply adjust the fuel temperature using heating/cooling means and an electric heater, it is difficult to accurately adjust the fuel temperature and test at a wide range of different fuel temperature settings. It was difficult.
また、従来内燃機関試験用の燃料温度調整装置
ではないが、内燃機関の冷却水又は冷風等の冷却
流体によるクーラを利用し、温度センサを用いて
燃料温度を制御する内燃機関の噴射燃料供給装置
（実開昭57−157755号公報）が提案されている。 In addition, although it is not a conventional fuel temperature adjustment device for internal combustion engine testing, it is an injection fuel supply device for an internal combustion engine that uses a cooler with cooling fluid such as cooling water or cold air for the internal combustion engine and controls the fuel temperature using a temperature sensor. (Utility Model Application Publication No. 57-157755) has been proposed.
しかし、この装置も単にクーラ（冷却装置）だ
けしか備えられておらず、また燃料をクーラを通
すか、通さないかを制御するだけである。 However, this device is only equipped with a cooler (cooling device), and only controls whether or not the fuel passes through the cooler.
従つて、前記装置と同様、燃料温度を試験に適
した精度の高い一定の温度にすることは困難であ
り、また広範囲で異なる燃料設定温度での試験も
困難であつた。 Therefore, like the above-mentioned apparatus, it is difficult to keep the fuel temperature at a constant temperature with high accuracy suitable for testing, and it is also difficult to test at fuel set temperatures that vary over a wide range.
本考案は、前記従来の課題に鑑みて為されたも
のであり、その目的は、制御遅れを小さくして、
燃料温度を試験に適した精度の高い一定の温度に
し、また燃料温度を広範囲で制御を可能にして、
広範囲で異なる燃料設定温度での試験を可能にす
る内燃機関試験用の燃料温度調整装置を提供する
ことにある。 The present invention was made in view of the above-mentioned conventional problems, and its purpose is to reduce control delay,
The fuel temperature is kept at a constant temperature with high precision suitable for testing, and the fuel temperature can be controlled over a wide range.
An object of the present invention is to provide a fuel temperature adjustment device for internal combustion engine testing that enables testing at a wide range of different fuel set temperatures.
前記目的を達成するための本考案は、燃料タン
クから燃料噴射ポンプに至る燃料通路の一部下流
側を冷却用燃料通路と加熱用燃料通路とに分け、
冷却用燃料通路に燃料を冷却する熱交換器を設
け、加熱用燃料通路には燃料を加熱する熱交換器
を設け、冷却する熱交換器は第１の温度検出手段
を備えた水を媒体とする低温槽の中に設けられ、
加熱する熱交換器は第２の温度検出手段を備えた
水を媒体とする高温槽の中に設けられ、第１及び
第２の温度検出手段からの検出信号に基づき低温
槽、高温槽夫々の中に設けられた冷却手段、加熱
手段をそれぞれ制御する第１及び第２のコントロ
ーラを設けると共に、冷却用燃料通路と加熱用燃
料通路の各熱交換器下流側に燃料通過量を調整す
るバルブをそれぞれ設け、冷却燃料と加熱燃料と
が合流する燃料通路に燃料の温度を検出する第３
の温度検出手段を設け、更に燃料噴射ポンプのオ
ーバフロー、戻り燃料用のオーバフロー通路に第
４の温度検出手段を設け、その第３及び第４の温
度検出手段の検出出力により各バルブの開度を制
御する制御手段を前記燃料タンクから燃料噴射ポ
ンプに至る燃料通路に設けたことを特徴とする。
To achieve the above object, the present invention divides a part of the downstream side of the fuel passage from the fuel tank to the fuel injection pump into a cooling fuel passage and a heating fuel passage,
A heat exchanger for cooling the fuel is provided in the cooling fuel passage, a heat exchanger for heating the fuel is provided in the heating fuel passage, and the cooling heat exchanger uses water as a medium and is equipped with a first temperature detection means. installed in a low-temperature chamber,
The heat exchanger for heating is installed in a high-temperature bath using water as a medium and equipped with a second temperature detection means, and the temperature of each of the low-temperature bath and the high-temperature bath is determined based on the detection signals from the first and second temperature detection means. First and second controllers are provided to respectively control the cooling means and heating means provided therein, and valves are provided downstream of each heat exchanger in the cooling fuel passage and the heating fuel passage to adjust the amount of fuel passing through the heat exchanger. A third tube is installed in each fuel passage where the cooling fuel and the heating fuel join to detect the temperature of the fuel.
Furthermore, a fourth temperature detection means is provided in the overflow passage of the fuel injection pump and an overflow passage for return fuel, and the opening degree of each valve is determined by the detection output of the third and fourth temperature detection means. The present invention is characterized in that a control means is provided in a fuel passage leading from the fuel tank to the fuel injection pump.
燃料タンクから燃料噴射ポンプに供給される燃
料は冷却用燃料通路と加熱用燃料通路とに分かれ
て流れ、冷却用燃料通路中を流れる燃料は第１の
温度検出手段の検出出力を基に第１のコントロー
ラで制御される冷却手段を介して冷却される熱交
換器によつて冷却され、一方加熱用燃料通路を流
れる燃料は第２の温度検出手段の検出出力を基に
第２のコントローラで制御される加熱手段を介し
て加熱される熱交換器によつて加熱される。そし
て、各熱交換器を通過した燃料は第３の温度検出
手段及び第４の温度検出手段の検出出力を基に制
御手段の制御による各バルブの開度に応じて流
れ、その後合流して燃料噴射ポンプに供給され
る。
The fuel supplied from the fuel tank to the fuel injection pump is divided into a cooling fuel passage and a heating fuel passage, and the fuel flowing through the cooling fuel passage is divided into a cooling fuel passage and a heating fuel passage. The fuel flowing through the heating fuel passage is controlled by a second controller based on the detection output of the second temperature detection means. It is heated by a heat exchanger which is heated via a heating means. The fuel that has passed through each heat exchanger flows in accordance with the opening degree of each valve under the control of the control means based on the detection outputs of the third temperature detection means and the fourth temperature detection means, and then merges to form the fuel. Supplied to the injection pump.
以下、本考案の実施例を図面に基づいて説明す
る。
Hereinafter, embodiments of the present invention will be described based on the drawings.
第１図には、本考案の好適な実施例の構成が示
されている。同図において、燃料タンク１０から
燃料噴射ポンプ（インジエクシヨンポンプ）１１
に至る燃料通路１２中にはバルブ１３、流量計１
４、フイルタ１５が挿入されていると共に燃料通
路１２の一部下流側が冷却用燃料通路１２Ａと加
熱用燃料通路１２Ｂとに分けられ、各燃料通路１
２Ａと１２Ｂとが再び合流してインジエクシヨン
ポンプ１１に連結されている。 FIG. 1 shows the configuration of a preferred embodiment of the present invention. In the figure, a fuel injection pump (injection pump) 11 is connected to a fuel tank 10.
A valve 13 and a flow meter 1 are installed in the fuel passage 12 leading to the
4. A filter 15 is inserted, and a part of the downstream side of the fuel passage 12 is divided into a cooling fuel passage 12A and a heating fuel passage 12B, and each fuel passage 1
2A and 12B are combined again and connected to injection pump 11.
冷却用燃料通路１２Ａ中には、低温槽１６とバ
ルブ１７がある。低温槽１６中は水が満たされて
おり、この水中には冷却用燃料通路１２Ａ中の燃
料を冷却する熱交換器１８，１９が配設され、さ
らに水の温度を検出する温度センサ（第１の温度
検出手段）２０が設けられている。又水中には水
を冷却する他の熱交換器２１が配設されている。
この熱交換器２１はコンプレツサ２２、コンデン
サユニツト２３、ドライヤ２４、モータ２５を含
み、クーラユニツト（冷却手段）２６として機能
している。又熱交換器２１にはコンプレツサ２２
によつて圧縮された冷媒がコンデンサユニツト２
３、ドライヤ２４を介して供給されるようになつ
ている。このため、熱交換器２１によつて低温槽
１６中の水が冷却され、さらにこの冷却された水
によつて冷却された熱交換器１８，１９を介して
冷却用燃料通路１２Ａ中の燃料が冷却される。そ
して温度センサ２０の検出出力を基に第１のコン
トローラ２７からの指令によつてモータ２５をオ
ン・オフすることによつて低温槽１６中の水の温
度が調整されるようになつている。 A cryostat 16 and a valve 17 are provided in the cooling fuel passage 12A. The cryostat 16 is filled with water, and heat exchangers 18 and 19 are disposed in the water to cool the fuel in the cooling fuel passage 12A, and a temperature sensor (a first temperature detection means) 20 is provided. Further, another heat exchanger 21 for cooling the water is arranged in the water.
This heat exchanger 21 includes a compressor 22, a condenser unit 23, a dryer 24, and a motor 25, and functions as a cooler unit (cooling means) 26. Also, the heat exchanger 21 includes a compressor 22.
The refrigerant compressed by
3. It is supplied via a dryer 24. Therefore, the water in the cryostat 16 is cooled by the heat exchanger 21, and the fuel in the cooling fuel passage 12A is further cooled by the cooled water through the heat exchangers 18 and 19. cooled down. Based on the detection output of the temperature sensor 20, the temperature of the water in the low temperature chamber 16 is adjusted by turning on and off the motor 25 in accordance with commands from the first controller 27.
一方、加熱用燃料通路１２Ｂ中には、高温槽２
８とバルブ２９がある。高温槽２８中は水が満た
されていると共に、この水中に加熱用燃料通路１
２Ｂ中の燃料を加熱する熱交換器３０が設けら
れ、又水を加熱するヒータ３１が設けられ、さら
に水の温度を検出する温度センサ（第２の温度検
出手段）３２が設けられている。高温槽２８中の
水はヒータ（加熱手段）３１によつて加熱され、
加熱された水によつて熱交換器３０が加熱され、
さらに熱交換器３０を介して加熱用燃料通路１２
Ｂ中の燃料が加熱されるようになつている。そし
て、温度センサ３２の出力を基に第２のコントロ
ーラ３３からの指令によつてヒータ３１をオン・
オフすることによつて高温槽２８中の水の温度が
調整されるようになつている。又バルブ１７，２
９は、制御手段としての演算器３４からの指令に
よつて開度が制御されるようになつている。又本
実施例においては、バルブ１７，２９の開度は互
いに開度が相反するように調整されるようになつ
ている。即ち、バルブ１７の開度が大きくなると
きにはバルブ２９の開度が小さくなるようになつ
ている。そして各バルブ１７，２９の開度は冷却
燃料と加熱燃料とが合流する燃料通路１２Ｃ中に
設けられた温度センサ（第３の温度検出手段）３
５の検出出力を基に調整されるようになつてい
る。 On the other hand, in the heating fuel passage 12B, there is a high temperature tank 2.
8 and valve 29. The high temperature tank 28 is filled with water, and the heating fuel passage 1 is in this water.
A heat exchanger 30 for heating the fuel in 2B is provided, a heater 31 for heating the water, and a temperature sensor (second temperature detection means) 32 for detecting the temperature of the water. The water in the high temperature tank 28 is heated by a heater (heating means) 31,
The heat exchanger 30 is heated by the heated water,
Furthermore, the heating fuel passage 12 is connected via the heat exchanger 30.
The fuel in B is heated. Then, the heater 31 is turned on and off by a command from the second controller 33 based on the output of the temperature sensor 32.
By turning it off, the temperature of the water in the high temperature tank 28 is adjusted. Also valves 17, 2
9, the opening degree is controlled by a command from a computing unit 34 as a control means. Further, in this embodiment, the opening degrees of the valves 17 and 29 are adjusted so that the opening degrees are opposite to each other. That is, when the opening degree of the valve 17 increases, the opening degree of the valve 29 decreases. The opening degree of each valve 17, 29 is determined by a temperature sensor (third temperature detection means) 3 provided in the fuel passage 12C where the cooling fuel and heating fuel join.
The adjustment is made based on the detection output of No.5.
さらに冷却燃料と加熱燃料が合流する燃料通路
１２Ｃには、前述のインジエクシヨンポンプ１１
があり、そのポンプ１１に各噴射ノズル３６，３
７，３８，３９が接続されている。そして余分な
燃料及び各ノズル３６〜３９から噴射された残り
の燃料はインジエクシヨンポンプ１１及び各ノズ
ル３６，３７，３８，３９からオーバフロー通路
４０を介してフイルタ１５へ戻るようになつてい
る。そのフイルタ１５へ戻すオーバフロー通路４
０には、オーバフロー中の燃料の温度を検出する
温度センサ（第４の温度検出手段）４１が設けら
れており、温度センサ４１の検出出力は演算器４
２に供給されている。即ち、本実施例において
は、インジエクシヨンポンプ１１に供給される燃
料の温度と各ノズル３６〜３９から噴射された燃
料の温度とが異なることからオーバフロー通路４
０中の燃料の温度を検出し、この温度を基にバル
ブ１７，２９の開度を制御することとしている。
そして、温度センサ４１の検出出力と温度センサ
３５との検出出力をそれぞれ演算器４２，３４を
介して比較し、各温度センサの検出出力が異なる
ときには温度センサ４１の検出出力が設定温度に
一致するように、バルブ１７，２９の開度を制御
する。例えば燃料の温度が設定温度よりも高いと
きにはバルブ１７の開度を大きくし、バルブ２９
の開度を小さくする。逆に、燃料の温度が低いと
きにはバルブ１７の開度を小さくしバルブ２９の
開度を大きくする。 Further, in the fuel passage 12C where the cooling fuel and the heating fuel join, the injection pump 11 described above is installed.
There is a pump 11 with each injection nozzle 36, 3
7, 38, and 39 are connected. The excess fuel and the remaining fuel injected from each nozzle 36 to 39 are returned to the filter 15 from the injection pump 11 and each nozzle 36, 37, 38, 39 via an overflow passage 40. Overflow passage 4 returning to the filter 15
0 is provided with a temperature sensor (fourth temperature detection means) 41 that detects the temperature of the overflowing fuel, and the detection output of the temperature sensor 41 is sent to the computing unit 4.
2 is supplied. That is, in this embodiment, since the temperature of the fuel supplied to the injection pump 11 and the temperature of the fuel injected from each nozzle 36 to 39 are different, the overflow passage 4
The temperature of the fuel at zero is detected, and the opening degrees of the valves 17 and 29 are controlled based on this temperature.
Then, the detection output of the temperature sensor 41 and the detection output of the temperature sensor 35 are compared via calculation units 42 and 34, respectively, and when the detection output of each temperature sensor is different, the detection output of the temperature sensor 41 matches the set temperature. The opening degrees of the valves 17 and 29 are controlled accordingly. For example, when the temperature of the fuel is higher than the set temperature, the opening degree of valve 17 is increased, and the opening degree of valve 29 is increased.
Reduce the opening. Conversely, when the temperature of the fuel is low, the opening degree of valve 17 is decreased and the opening degree of valve 29 is increased.
このように、本実施例においては、燃料を熱交
換器１８，１９で冷却すると共に熱交換器３０で
加熱し、温度センサ４１の検出出力を基にバルブ
１７，２９の開度を調整し、冷却された燃料と加
熱した燃料とを合流させてインジエクシヨンポン
プ１１へ送給するようにしたので、第２図に示さ
れるように燃料温度は負荷によつて特性100で示
されるように変化し、温度調整を行なわないとき
には燃料温度は特性101のように変化するが、特
性102で示されるように設定温度103に近似するよ
うに正確に維持することができる。 As described above, in this embodiment, the fuel is cooled by the heat exchangers 18 and 19 and heated by the heat exchanger 30, and the opening degrees of the valves 17 and 29 are adjusted based on the detection output of the temperature sensor 41. Since the cooled fuel and the heated fuel are combined and fed to the injection pump 11, the fuel temperature changes depending on the load as shown by the characteristic 100, as shown in FIG. However, when temperature adjustment is not performed, the fuel temperature changes as shown in characteristic 101, but as shown in characteristic 102, it can be accurately maintained to approximate set temperature 103.
即ち、低温槽（冷却装置）１６、高温槽（加熱
装置）２８の下流で、かつ燃料噴射ポンプ１１の
直前で燃料の合流（混合）を行ない、しかも混合
点での温度制御を行ないながら、最終的に温度セ
ンサ（第４の温度検出手段）４１の温度を基に燃
料温度を制御するため、制御遅れが小さくなり、
燃料温度を試験に適した精度の高い一定の温度に
することができる。 That is, the fuels are combined (mixed) downstream of the low temperature tank (cooling device) 16 and high temperature tank (heating device) 28 and just before the fuel injection pump 11, and while controlling the temperature at the mixing point, the final Since the fuel temperature is controlled based on the temperature of the temperature sensor (fourth temperature detection means) 41, the control delay is reduced.
The fuel temperature can be kept at a constant temperature with high accuracy suitable for testing.
また、本実施例においては、コントローラ２
７，３３により制御できる専用の低温槽（冷却装
置）１６、高温槽（加熱装置）２８があるので、
演算器４２により燃料設定温度を変えることによ
り、燃料温度を広範囲で制御が可能になり、広範
囲で異なる燃料設定温度での試験が可能となる。 Furthermore, in this embodiment, the controller 2
There is a dedicated low temperature tank (cooling device) 16 and high temperature tank (heating device) 28 that can be controlled by
By changing the fuel temperature setting using the computing unit 42, it becomes possible to control the fuel temperature over a wide range, and it becomes possible to perform tests at different fuel temperature settings over a wide range.
なお、温度センサ４１は分配型噴射ポンプのと
きには必要であるが、噴射ポンプとして列型のも
のを用いるときには噴射ポンプがオイルで冷却さ
れるため、温度センサ４１は不要となり、温度セ
ンサ３５の検出出力を基にバルブ１７，２９の開
度を調整することによつて燃料の温度を設定温度
に維持することができる。 Note that the temperature sensor 41 is necessary when a distribution type injection pump is used, but when a row type injection pump is used as the injection pump, the injection pump is cooled with oil, so the temperature sensor 41 is unnecessary, and the detection output of the temperature sensor 35 is The temperature of the fuel can be maintained at the set temperature by adjusting the opening degrees of the valves 17 and 29 based on this.
以上説明したように本考案によれば、制御遅れ
が小さくなつて燃料温度を試験に適した精度の高
い一定の温度にすることができる。また、燃料温
度を広範囲で制御を可能にして、広範囲で異なる
燃料設定温度での試験が可能になるという顕著な
効果を奏する。
As explained above, according to the present invention, the control delay is reduced and the fuel temperature can be maintained at a constant temperature with high accuracy suitable for testing. Further, it has the remarkable effect of making it possible to control the fuel temperature over a wide range and making it possible to perform tests with different set fuel temperatures over a wide range.
第１図は本考案の一実施例を示す構成図、第２
図は本考案に係る装置の温度特性を説明するため
の図である。
１０……燃料タンク、１１……燃料噴射ポンプ
（インジエクシヨンポンプ）、１２，１２Ｃ……燃
料通路、１２Ａ……冷却用燃料通路、１２Ｂ……
加熱用燃料通路、１６……低温槽、１７，２９…
…バルブ、１８，１９，２１，３０……熱交換
器、３１……ヒータ、２０，３２，３５，４１…
…温度センサ、２６……クーラユニツト、２７，
３３……コントローラ、２８……高温槽、３４，
４２……演算器、４０……オーバフロー通路。
Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a diagram for explaining the temperature characteristics of the device according to the present invention. 10...Fuel tank, 11...Fuel injection pump (injection pump), 12, 12C...Fuel passage, 12A...Cooling fuel passage, 12B...
Heating fuel passage, 16...Cryogenic tank, 17, 29...
...Valve, 18, 19, 21, 30... Heat exchanger, 31... Heater, 20, 32, 35, 41...
...Temperature sensor, 26...Cooler unit, 27,
33...controller, 28...high temperature tank, 34,
42... Arithmetic unit, 40... Overflow path.
Claims (1)
の一部下流側を冷却用燃料通路と加熱用燃料通路
とに分け、冷却用燃料通路に燃料を冷却する熱交
換器を設け、加熱用燃料通路には燃料を加熱する
熱交換器を設け、冷却する熱交換器は第１の温度
検出手段を備えた水を媒体とする低温槽の中に設
けられ、加熱する熱交換器は第２の温度検出手段
を備えた水を媒体とする高温槽の中に設けられ、
第１及び第２の温度検出手段からの検出信号に基
づき低温槽、高温槽夫々の中に設けられた冷却手
段、加熱手段をそれぞれ制御する第１及び第２の
コントローラを設けると共に、冷却用燃料通路と
加熱用燃料通路の各熱交換器下流側に燃料通過量
を調整するバルブをそれぞれ設け、冷却燃料と加
熱燃料とが合流する燃料通路に燃料の温度を検出
する第３の温度検出手段を設け、更に燃料噴射ポ
ンプのオーバフロー、戻り燃料用のオーバフロー
通路に第４の温度検出手段を設け、その第３及び
第４の温度検出手段の検出出力により各バルブの
開度を制御する制御手段を前記燃料タンクから燃
料噴射ポンプに至る燃料通路に設けたことを特徴
とする内燃機関試験用の燃料温度調整装置。 A part of the downstream side of the fuel passage from the fuel tank to the fuel injection pump is divided into a cooling fuel passage and a heating fuel passage, and a heat exchanger for cooling the fuel is provided in the cooling fuel passage, and a heat exchanger is installed in the heating fuel passage. A heat exchanger for heating the fuel is provided, a heat exchanger for cooling the fuel is provided in a low temperature bath using water as a medium and is provided with a first temperature detection means, and a heat exchanger for heating the fuel is provided with a second temperature detection means. installed in a high-temperature tank with water as a medium,
First and second controllers are provided to control the cooling means and heating means provided in the low temperature chamber and the high temperature chamber, respectively, based on detection signals from the first and second temperature detection means, and cooling fuel is provided. A valve for adjusting the amount of fuel passing through the passage and the heating fuel passage is provided downstream of each heat exchanger, and a third temperature detection means for detecting the temperature of the fuel is provided in the fuel passage where the cooling fuel and the heating fuel join. Further, a fourth temperature detection means is provided in the overflow passage for the overflow and return fuel of the fuel injection pump, and a control means is provided for controlling the opening degree of each valve based on the detection output of the third and fourth temperature detection means. A fuel temperature adjustment device for internal combustion engine testing, characterized in that it is provided in a fuel passage leading from the fuel tank to the fuel injection pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986012585U JPH0437260Y2 (en) | 1986-01-31 | 1986-01-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986012585U JPH0437260Y2 (en) | 1986-01-31 | 1986-01-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62126559U JPS62126559U (en) | 1987-08-11 |
| JPH0437260Y2 true JPH0437260Y2 (en) | 1992-09-02 |
Family
ID=30800851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986012585U Expired JPH0437260Y2 (en) | 1986-01-31 | 1986-01-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0437260Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6145316Y2 (en) * | 1981-03-26 | 1986-12-19 | ||
| JPS614697Y2 (en) * | 1981-03-31 | 1986-02-13 |
-
1986
- 1986-01-31 JP JP1986012585U patent/JPH0437260Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62126559U (en) | 1987-08-11 |
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