The 2017 engine will pick up such a torque converter
A new torque converter will soon appear in those models equipped with a small model engine and an automatic transmission. Compared to the older models, the new torque converter is not only smaller in size but also lower in weight, but it also has increased Important features.
Jeff Hemphill, chief technology officer of Schaeffler's North American headquarters, said that the trend of reducing the size of auto parts has prompted them to develop three-cylinder engine technology, but the engine will produce abnormally violent vibration when it comes to outputting power. At the company’s recent technology seminar in Detroit, Hemphill’s R&D team introduced the LuKiTC integrated torque converter in detail. This simplified design incorporating the damper helps to effectively control engine vibration, resulting in a small engine that reduces fuel consumption. More practical value.
iTC integrated torque converter sectional view, showing integrated piston and additional damper The new iTC integrated torque converter cancels the 3 to 4 mm thick piston disc used by Schaeffler's previous products, so engineers need to provide the functionality of the piston plate. Integration into the turbocharger results in a thicker turbocharger. For decades torque converters consist of two components, but Schaeffler has reduced to one. Another benefit of eliminating the piston plate is its reduced weight. The iTC integrated torque converter's mass is 10.7 kilograms, which is 2.4 kilograms less than the previous product's 13.1 kilograms. Taking into account the deletion of a 3 to 4 mm thick component and the gap between the original component, the torque converter can be reduced by 5 to 6 mm in the axial space.
LukiTC multi-purpose torque converter and impeller clutch can ensure the stability of the engine at higher speeds. Because the impeller is not directly connected with the engine, the engine can provide more powerful torque in a shorter time; if applied to a turbocharged engine, it can also help reduce the turbo lag effect. The iTC torque converter ensures that impeller clutches can be applied smoothly without the need for large-scale adjustments, thanks to the ability of the impeller clutch to be integrated into the turbine clutch. In addition to the two standard pressure channels, there is a third channel from the back of the impeller clutch to the oil pan.
The latest US fuel economy regulations will come into effect in 2025. As the date approaches, the improvement of fuel economy has become a priority for the entire industry. The iTC integrated torque converter improves fuel efficiency in many ways. First, the reduced weight helps to reduce fuel consumption. In addition, a larger damper is installed inside the torque converter to allow the power system to run more efficiently.
The iTC integrated torque converter is likely to be used in new models for the first time in 2017. Now, Schaeffler R & D personnel are using the front and rear wheel drive models produced by American and Asian automakers to fully develop prototype products.
Globe valve, also known as cut-off valve, is a mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the top of the valve stem will occur. According to the connection method, it is divided into three types: flange connection, thread connection and welding connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. decrease. At the same time, under the action of the medium, this form of valve is also tighter. my country's valve "Three Chemicals" once stipulated that the flow direction of the globe valve should be from top to bottom. When the globe valve is opened, the opening height of the valve disc is 25% to 30% of the nominal diameter. The flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve disc.
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