福特Bypass Converter Clutch Circuits

Typical lock-up torque converters have two oil circuits to keep the converter charged with oil and to control release/apply of the torque converter clutch. Some Ford torque converters are different, having an additional third oil circuit in the torque converter.

In most conventional non lock-up torque converters, oil is fed to the rear half of the torque converter (converter impeller) and then flows through the front half of the converter (converter turbine) and exits. The direction of the oil flow never changes.

In a typical lock-up torque converter, the direction of oil flow into and out of the torque converter changes direction to control release/apply of the torque converter clutch. From the moment the engine is started, oil is fed between the torque converter front cover and the lock-up piston. This keeps the TCC piston pushed away from the front cover and in the TCC released position. Oil then flows through the rear half of the converter and exits.Figure 1在TCC发布模式下示出了典型的变bob游戏怎么下载矩器。

为了涂抹转矩转换器离合器，bob游戏怎么下载TCC施加/开关阀改变位置和通过转换器的油流动方向颠倒。叶轮和涡轮区域（TCC施加压力）在压力下的流体将TCC活塞推入接合转换器离合器的前盖中。在前盖与锁定活塞（TCC释放油）之间的油允许排气之前，TCC没有完全涂抹。

福特CD4E,AXOD/E,AX4N,AODE/4R70W和G4./F4EAT变速器使用三个油电路来保持转换器充电，并控制变矩器离合器的释放/施加。bob游戏怎么下载油流入转矩转换器（转换器叶轮CI）的后部，然后流过转换涡轮机（bob游戏怎么下载CT）并退出。CI和CT电路中的油流与非锁定转换器相同，通过这些电路的油流动方向永远不会改变。第三种油电路称为转换器旁路或CBY，并控制转换器离合器的施加/释放。

从发动机首次启动时，油通过CI（转换器叶轮）和CBBy旁路油电路进入转换器。油通过CT（转换器涡轮）油电路离开转换器。旁路油在变矩器前盖和锁定活塞之间流动。bob游戏怎么下载这使得TCC活塞从TCC释放位置中的TCC中推开远离前盖。Figure 3在TCC发布模式下示出了典型的福特旁路转矩转换器。bob游戏怎么下载

Problems with Bypass Circuits:

Low converter pressure (CT) is the equivalent of low TCC apply pressure and results in TCC slip. Low converter pressure can be caused by a reduced volume of oil being fed to the converter due to problems in the valve body, pump, torque converter as well as external electronic controls.

阀体压力调节器孔wear as well as trouble codes, FMEM (PCM failure mode) can also result in lower converter pressure. Low pump volume or high line pressure causes the pressure regulator valve to restrict converter charge (CI).

格雷格纳德是一个Sonnax技术专家和成员TASC Force®(Technical Automotive Specialties Committee), a group of recognized industry technical specialists,transmissionRebuilders和Sonnax Industries Inc.技术人员。