EXEDY Tech - Torque Converter Function Explained

[Music] [Applause] [Music] located between a car's engine and its transmission is a torque converter which is connected to the engine through a drive plate the torque converter is a crucial component of the drivetrain it amplifies engine torque and transfers it to the automatic transmission [Music] a torque converter consists of three veined wheels the door converter is filled with automatic mission fluid from the transmission engine power is transmitted to the transmission via the soil power from the engine is first transmitted to the torque converters front cover integrally connected to the front cover is a veined wheel called an impeller which the transmitted power causes to revolve the impeller blades make the oil revolve the oil is pushed outward at high speed by the engine torque this oil pushes against another vain wheel called a turbine making it revolve you you drive power is transmitted from the turbine through the input shaft to the transmission typically this drive torque is not enough to briskly accelerate a vehicle from a complete stop the solution to this is the addition of a component called a stator or reactor the stator functions to smoothly return the oil from the turbine back to the impeller without any power loss when the vehicle first starts moving the oil flowing through the turbine next flows through the stator and is returned to direction amplifying the power used to turn the turbine as the vehicle accelerates and the speed of the turbine increases the stator becomes a resistance that makes the oil flow less efficiently dissipating power for this reason a one-way clutch is built into the stator as the speed of the turbine increases the stator revolves without creating any resistance some transmission loss is unavoidable in a torque converter that uses oil to transmit drive power to reduce laws a damper equipped lock up clutch is used to enable direct connection the damper equipped lockup clutch is installed between the front cover and the engine side of the turbine and moves in the axial direction in accordance with changes in oil pressure a change in oil pressure presses the damper equipped lock of clutch against the front cover through this action the drive power transmitted to the front cover is directly transferred from the damper equipped lock up clutch to the transmission via the turbine but because the engine and transmission are directly connected fluctuations in the engines rotational speed are also transmitted to the transmission this causes the drivetrain to generate vibration and resultant noise a spring built into the damper equipped lock-up clutch absorbs the vibration so it is not transmitted to the transmission today the growing number of front-engine front-wheel-drive vehicles which have a transversal powertrain layout has generated demand for elliptical type torque converters because they take up less space in the axial direction the recent trend toward five and six-speed automatic transmissions has created a need for super elliptical torque converters that take up even less axial space to allow more space for the transmission this is a cross-section of a torque converter this is where the oil revolves oil flows more easily when the torque converter is round with an elliptical torque converter the flow is not as smooth reducing torque converter performance [Music] Peck City is now developing a high-performance compact elliptical torque converter that offers extremely smooth oil flow research is now underway to determine how to achieve smooth oil flow despite the difficulties presented by an elliptical shape as a torque converter revolves at high speed and its blades are a three dimensional it is extremely difficult to examine the oil flow inside you we also utilize method called PIV to measure the oil flow inside a torque converter this method employs a transparent torque converter and special particles in the oil which are illuminated by laser to visualize the oil flow previous experimental methods yielded only inferred values for oil flow visualization using the PIV method provides data that is much more precise utilizing the huge volume of data obtained through this cutting-edge technology together with advanced simulation technology Henk city is able to develop high efficiency high-performance torque converters much more quickly computer programs that simulate fuel economy and acceleration performance enable exudate to design converters that perfectly match of vehicle's requirements Peck city is also utilizing these technologies to develop a very compact starting device consisting of a torque converter that incorporates a high-performance damper [Music] [Applause] [Music] offering performance and quality to satisfy requirements around the world Exedy will continue meeting the challenge as drivetrain specialists powering the further evolution of the automobile and today's motorized Society [Music] Exley [Music]

Channel: EXEDYUSA

Views: 198,980

Keywords: exedy, torque converter, function, how it works

Id: YBW4EYVSzPI

Length: 9min 3sec (543 seconds)

Published: Wed May 01 2013