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
C15 and C18 Engines for Caterpillar Built Machines Alternator Mounting
966H Wheel Loader and 972H Wheel Loader Power Train MID 081 - CID 1400 - FMI 06
3500 and 3500B High Displacement Engines for Caterpillar Built Machines Engine Oil Scavenge Pump - Install
AP-1000D and BG-260D Asphalt Pavers Machine Systems Electric Motor (Screed Burner Fuel Pump) - Remove and Install
2005/09/26 A New Fuel Lift Pump is Now Available {1256, 1258}
793D Off-Highway Truck Air System and Brakes Relief Valve (Brake Oil Cooler) - Test and Adjust
M325D MH Material Handler Air Conditioning and Heating Control
966H Wheel Loader and 972H Wheel Loader Electrohydraulic System Electronic Control Module (ECM) - Configure
CB-534D, CB-534D Series XW and CB-564D Vibratory Compactors Engine Supplement Fuel Priming Pump and Fuel Filter Base - Remove and Install
D7R Series 2 Track-Type Tractor Power Train Bevel and Transfer Gears
3500 and 3500B High Displacement Engines for Caterpillar Built Machines Engine Oil Scavenge Pump - Remove
950H Wheel Loader, 962H Wheel Loader and IT62H Integrated Toolcarrier Electrohydraulic System Relief Valve (Load Sensing Signal)
AP-1000D and BG-260D Asphalt Pavers Machine Systems Hydraulic Cylinder (Screed Hoist)
R1600G Load Haul Dump Power Train Final Drive and Wheel - Disassemble
R1600G Load Haul Dump Power Train Final Drive and Wheel - Assemble
R1600G Load Haul Dump Power Train Final Drive and Wheel - Install
R1600G Load Haul Dump Power Train Final Drive and Wheel - Remove
R1600G Load Haul Dump Power Train Wheel Spindle - Remove and Install
793D Off-Highway Truck Power Train Transmission Hydraulic Control Clutch Pressure - Test
R1300G Series II Load Haul Dump Power Train Torque Converter Case
2005/10/17 An Increased Torque Replaces The Use of Anti-seize Compound on the Rear Wheel Group. {4201}
793D Off-Highway Truck Steering System Pressure Switches
793D Off-Highway Truck Power Train Transmission Hydraulic Control Shift Signal Pressure - Test