Torque converter

For instance, power can be transmitted from one machine to the other through shafts, flexible couplings, and gear reducers (mechanical equipment). Power can be transmitted through a torque converter (hydraulic equipment) or by a combination of mechanical and hydraulic equipment. 

When the vehicle is at a standstill, the torque converter delivers approximately twice the engine torque to the gearbox. This torque multiplication falls... 

The torque converter soon replaced the fluid coupling as the hydrodynamic device of choice in the automatic transmission. A schematic of a simple... 

The distinguishing performance characteristic of the torque converter, in contrast to the fluid coupling, is that It IS capable of multiplying torque. Torque multiplication is made possible by vane curvature and the presence of the reactor. When the converter is stalled—that is, the turbine and the reactor are stationary—the torque delivered to the gearbox is typically 2... 

Torque converters used in most drawworks are designed to absorb shocks from the prime movers or the driven equipment and to multiply the input torque. Torque converters are used in conjunction with internal combustion prime movers when these engines are used directly to drive the drawworks. More modern drawworks are driven by electric drives since such prime movers usually simplify the drawworks. 

Fill the torque converter (or automatic clutch ) and thus convey power from the engine to the gearbox ... 

TYPE OF GEAR and MAKER TYPE OF TORQUE CONVERTER and MAKER 35... 

The analysis shall be for the train as a whole unless the train includes a device that has weak dynamic coupling, for example, a hydraulic coupling or torque converter. 

Thermal considerations are paramount for ATFs. A great deal of friction is produced, which generates heat and high-temperature spikes at the torque converter this will damage the fluid. ATF is designed to operate at temperatures around 95°C. At the torque converter, under extreme conditions, temperatures can reach 120°C. A transmission fluid should be designed to handle these temperature extremes. The transmission fluid will quickly break down above 120°C. Temperature spikes in the torque converter have been known to go above 120°C. 

The torque converter is a type of fluid coupling device that hydraulically connects the engine to the transmission—analogous to a mechanical clutch. Used in conjunction with the torque converter is a stator, which essentially assists at low engine speeds, thus increasing acceleration. The vanes inside the converter alter the shape of the fluid path into the stator. The stator captures the kinetic energy of the transmission to enhance torque multiplication. This process will not only increase heat, but also increase shear of the transmission fluid. In addition to torque conversion, at every shift event, clutch packs generate heat, which must be carried away by the transmission fluid. 

Efficient Mechanical Power Train The 797 power train includes a new torque converter with lockup clutch that delivers high mechanical efficiency. The new automatic-shift transmission features seven speeds forward and one speed reverse. Electronic clutch pressure control (ECPC) technology smoothes shifts, reduces wear, and increases reliability. Large clutch discs give the transmission high torque capacity and extend transmission life. The transmission and torque converter enable the truck to maintain good speed up grades and to reach a top speed of 40 mph (64 km/h). 

M88 4-speed automatie transmission is equipped with the hydraulie torque converter and electric control system with locking. When keep the stable forward status, the hydraulic torque converter can be locked automatically when the engine operates in low speed, then reduce the unnecessary slide. 

If improperly handled, the hydraulic torque converter may fall. Once the goods rack is removed, the hydraulic torque converter cannot get orientation. If the torque converter leans forwards, the oil will leak from the torque converter and transmission pump. It will be difficult to replace the hydraulic torque converter, because the oil quantity needs to be adjusted again after the re-installation of the torque converter. It needs training and technology to replace the torque converter correctlv. After re-installation of the torque converter, the oil quantity needs to be adjusted, and the external surplus oil shall be cleaned. 

The gross weight of the transmission is 76kg mostly weight is on the front of the transmission (side of torque converter). This should be considered when design the handling/assembly tools. 

Remove all torque converter bolts and push back the torque converter before remove the bolt connected the torque converter housing to engine. Once all bolts eoimeeted the torque converter housing to engine are removed, use the torque converter the push the transmission from the location pin, then ensure the torque converter is on the transmission and the transmission is... 

Install the dustproof cover on the cooler connector rapidly after open the oil cooler pipe otherwise the oil leakage from the torque converter will be 2L. The odometer dustproof cover can prevent the dirty from entering into the transmission and avoids... 

TCU controls the hydraulic control system and the control is realized through the valve and pump assembly. The system includes 7 solenoid valves, in which 6 valves are used to control the line pressure, operate the shift valve and hydraulic torque converter lock clutch and switch on and off two regulating valves (Two regulating valves control the shift feel). The seventh solenoid valve is the pressure regulating solenoid valve (VPS) which controls the shift feel with other three regulating valves. Figure 3.1 is the typical TCU... 

If the transmission temperature is beyond the 135 C, TCU will process the locking action in the low vehicle speed. In some vehicle model, it will have the flash of indicator lamp. In this condition, it will use the maximum oil flow to the external oil cooler to eliminate the slide of hydraulic torque converter. The two functions will decrease the oil temperature of transmission. 

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