JPH01139048U - - Google Patents
Info
- Publication number
- JPH01139048U JPH01139048U JP3503788U JP3503788U JPH01139048U JP H01139048 U JPH01139048 U JP H01139048U JP 3503788 U JP3503788 U JP 3503788U JP 3503788 U JP3503788 U JP 3503788U JP H01139048 U JPH01139048 U JP H01139048U
- Authority
- JP
- Japan
- Prior art keywords
- engine
- hydraulic pump
- controller
- switch
- water temperature
- 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
- 230000002265 prevention Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 2
- 239000002826 coolant Substances 0.000 claims 2
- 239000000498 cooling water Substances 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000013021 overheating Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Description
第１図はこの考案にかかるオーバヒート防止装
置の油圧―電気回路図、第２図は従来技術オーバ
ヒート防止装置の油圧―電気回路図である。
１，９……オーバヒート防止装置、２，１０…
…エンジン、３……可変容量型油圧ポンプ、４，
４′……サーボ機構、１１……水温用スイツチ、
１２……コントローラＡ、１３……コントローラ
Ｂ、１４……モード選択回路、１５……モード選
択スイツチ、１６……エンジン回転制御機構、１
７……電磁比例弁。
FIG. 1 is a hydraulic-electrical circuit diagram of the overheat prevention device according to this invention, and FIG. 2 is a hydraulic-electrical circuit diagram of the conventional overheat prevention device. 1, 9... Overheat prevention device, 2, 10...
...engine, 3...variable displacement hydraulic pump, 4,
4'...Servo mechanism, 11...Water temperature switch,
12... Controller A, 13... Controller B, 14... Mode selection circuit, 15... Mode selection switch, 16... Engine rotation control mechanism, 1
7...Solenoid proportional valve.
Claims (1)
その各モードに応じて可変容量型油圧ポンプの吸
収トルクを変化するようにし、かつエンジン用冷
却水の温度を検出してその冷却水温度が設定温度
を越えたとき、その検出信号により電磁弁および
サーボ機構を作動せしめて上記油圧ポンプの傾転
角を減少するようにした可変容量型油圧ポンプお
よびエンジンの制御装置において、エンジンの冷
却水系に水温用スイツチを設け、その水温用スイ
ツチと電磁比例弁とをコントローラＡを介して連
結し、一方、モード選択回路を有するコントロー
ラＢを設け、コントローラＡからの信号を上記モ
ード選択回路へ出力可能とし、またコントローラ
Ｂと、上記油圧ポンプ用サーボ機構およびエンジ
ン回転制御機構とを連結し、エンジンの冷却水温
度が設定温度を越えたとき上記油圧ポンプの吸収
馬力およびエンジン回転数を自動的に減少可能に
設定して構成したことを特徴とするエンジンのオ
ーバヒート防止装置。 Switch the engine's set output to multiple modes,
The absorption torque of the variable displacement hydraulic pump is changed according to each mode, and when the engine coolant temperature is detected and the coolant temperature exceeds the set temperature, the detection signal is used to control the solenoid valve and In a control device for a variable displacement hydraulic pump and engine that operates a servo mechanism to reduce the tilting angle of the hydraulic pump, a water temperature switch is provided in the engine cooling water system, and the water temperature switch and the electromagnetic proportional valve are connected to each other. are connected via the controller A, and on the other hand, a controller B having a mode selection circuit is provided so that a signal from the controller A can be output to the mode selection circuit, and the controller B and the servo mechanism for the hydraulic pump and the engine are connected. Engine overheating, characterized in that the engine is connected to a rotation control mechanism, and the absorption horsepower and engine rotation speed of the hydraulic pump are set to be automatically reduced when the engine cooling water temperature exceeds a set temperature. Prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3503788U JPH01139048U (en) | 1988-03-15 | 1988-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3503788U JPH01139048U (en) | 1988-03-15 | 1988-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01139048U true JPH01139048U (en) | 1989-09-22 |
Family
ID=31261696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3503788U Pending JPH01139048U (en) | 1988-03-15 | 1988-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01139048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05340279A (en) * | 1992-06-12 | 1993-12-21 | Shin Caterpillar Mitsubishi Ltd | Control device for engine and hydraulic pump of oil pressure driving machine, control method and control system thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62265481A (en) * | 1986-05-13 | 1987-11-18 | Komatsu Ltd | Variable delivery pump and control device for engine |
-
1988
- 1988-03-15 JP JP3503788U patent/JPH01139048U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62265481A (en) * | 1986-05-13 | 1987-11-18 | Komatsu Ltd | Variable delivery pump and control device for engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05340279A (en) * | 1992-06-12 | 1993-12-21 | Shin Caterpillar Mitsubishi Ltd | Control device for engine and hydraulic pump of oil pressure driving machine, control method and control system thereof |