Normal Operation
变速箱 ECM 控制换档点。 进行变速箱换档所需的基本部件及其相应要求如下:
变速箱换档控制 - ECM 必须要知道所需档位。 变速箱换档控制提供接地信号。 该接地信号随选择的档位变化。 变速箱 ECM 也支持 "J1939" 换档杆。
变速箱输出转速传感器(TOS) - ECM 必须要知道变速箱的输出转速。 一个 TOS 传感器告知 ECM 变速箱输出轴的转速。 该 TOS 提供此信息。
变矩器输出转速传感器 - ECM 必须要知道变矩器的输出转速。 一个转速传感器向 ECM 提供与变矩器转速有关的信息。
换档杆 - 变速箱起到手动换档的作用。 变速箱换至换档杆选择的档位。
变速箱离合器电磁阀 - ECM 必须用电力进行变速箱换档。 ECM 使用两个独立的电磁阀输出来进行变速箱换档。 变速箱一次只能换入一个档位。 ECM 用电力使两个电磁阀通电来进行变速箱换档操作。
下列各项是例外情况。
- 如果变速箱输出轴转速超过 1500 rpm,切勿尝试从前进档换至驻车档。 除非发动机转速低于 825 rpm 且变速箱输出轴转速低于 1500 rpm,否则 ECM 不会将变速箱换至驻车档。 这可避免损坏离合器和盘,从而防止变速箱过早出现故障。
- 变速箱不允许在不相邻的档位之间直接换档。 变速箱允许自动顺序换档。 如果允许换档,变速箱将会从当前档位顺序逐档升档至所需档位。 变速箱也会允许顺序降档。 变速箱会在每个档位停留一段最少时间,以避免离合器打滑以及损坏变速箱。
有四个事件会记录在 ECM 中。
- 变矩器油温高
- 变速箱油滤清器堵塞
- 变速箱误操作
- 转速传感器冲突
Caterpillar Information System:
3500 Generator Sets Engine Rating Definitions
3508C, 3512C and 3516C Marine Engines Electric Starting Motor - Remove and Install
C15 On-Highway Engine Engine Oil Pan
C18 Marine Auxiliary Engines Electrical Connectors
C13, C15, and C18 Tier 4 Final Engines Piston and Rings
TH48-E70-C27I, TH48-E70-C32I and TH48-E70-C32P Petroleum Power Train packages and TH48-E70 Petroleum Transmission Power Train Electronic Control System Lockup Clutch Disable Function
TH48-E70-C27I, TH48-E70-C32I and TH48-E70-C32P Petroleum Power Train packages and TH48-E70 Petroleum Transmission Power Train Electronic Control System MID 027 - CID 0247 - FMI 09
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Vibration Damper - Remove and Install
G3516B and G3520B Generator Set Engines Drive Housing (Front) - Remove and Install
621H, 623H, and 627H Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 0672 - FMI 08
621H, 623H, and 627H Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 0672 - FMI 02
TH48-E70-C27I, TH48-E70-C32I and TH48-E70-C32P Petroleum Power Train packages and TH48-E70 Petroleum Transmission Power Train Electronic Control System MID 027 - CID 0585 - FMI 08
G3516 Petroleum Engines Accessory Drive (Front) - Remove
2007/04/09 An Improved Expansion Tank is Available {1379}
3508C, 3512C and 3516C Marine Engines Turbocharger - Remove
G3516 Petroleum Engines Accessory Drive (Front) - Install
The Filter Bypass Light for the Transmission Filter May Activate Prematurely{3103} The Filter Bypass Light for the Transmission Filter May Activate Prematurely{3103}
G3516B and G3520B Generator Set Engines Rocker Shaft and Push Rod - Remove
C18 Power Module Cooling System Coolant (ELC) - Change
G3516B and G3520B Generator Set Engines Rocker Shaft and Push Rod - Install
G3516B and G3520B Generator Set Engines Cylinder Head - Disassemble
G3516B and G3520B Generator Set Engines Cylinder Head - Remove
G3516B and G3520B Generator Set Engines Cylinder Head - Assemble
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Cylinder Head - Install