Sensors
传感器向控制器提供关于工况变化的信息。 一些类型的信息如下列所示：转速, 温度 和 液位。 传感器信号成比例变化。 信号变化代表工况的改变。 控制器识别下列类型的传感器信号：
频率 - 传感器产生交流电信号（正弦波或方波），其频率随工况改变而变化。
脉冲宽度已调整 - 传感器产生数字信号（PWM），其工作循环随工况改变而变化。 信号的频率将保持恒定。
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| 图 1 | g00507191 |
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发动机转速传感器 | |
发动机转速传感器位于飞轮壳体上。 飞轮轮齿经过传感器末端时，将产生交流电压。 交流电频率与轮齿经过传感器末端时的轮齿转速成比例。 控制器使用此信号作出与液压泵和发动机相关的决定。
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| 图 2 | g00685436 |
这些传感器向控制器发送信号。 控制器将使用这些信号修改以下各项：
- 调整功率
- 改变行驶速度
- 确定轻负载和 1 级 "AEC"
Caterpillar Information System:
416E Backhoe Loader Extendable Stick Pads - Inspect/Adjust - If Equipped
374D and 390D Excavators Machine Electronic Control System Pedal Control
C15 and C18 Engines for Caterpillar Built Machines Alternator Mounting
345C MHPU Mobile Hydraulic Power Unit Machine Systems Pilot Valve (Travel) - Disassemble
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Refrigerant Receiver-Dryer - Remove and Install
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Refrigerant Condenser - Remove and Install
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Switches
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Muffler - Remove and Install
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Fuel Filter and Base - Remove and Install - Secondary
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Ether Start Valve - Remove and Install
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Engine Electronic Control - Remove and Install
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit C9 Engine Supplement Electric Starting Motor - Remove and Install
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power Unit Machine Systems Manual Valve (Auxiliary Shutoff) - Install
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Solenoids
320D and 323D Excavators Hydraulic System Engine Performance - Test - Engine Speed
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Related Components
345C MHPU Mobile Hydraulic Power Unit Machine Systems Pilot Valve (Travel) - Assemble
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power Unit Machine Systems Accumulator - Remove and Install
345C Excavator and 345C MHPU Mobile Hydraulic Power Unit Machine Systems Manual Ball Valve (Counterweight Circuit) - Remove
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System General Information
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Service Tools
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Electrical Component and Connector Locations
320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Diagnostic Capabilities
325D and 329D Excavators and 325D Material Handler Machine System Specifications Relief Valve (Pilot) - Front Lines