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What is the function of a torque converter?
Release date:
2022-07-27 09:58
Source:
What is the function of a torque converter?
It is a hydraulic coupling that transfers load from a rotating prime mover—such as an internal combustion engine—to a rotating driven component. In vehicles equipped with automatic transmissions, the torque converter connects the power source to the load. So, what is the function of a Dana torque converter?
What is the function of a torque converter?
1. Function of the clutch: When the engine is idling, the torque converter acts as a disengaged clutch between the engine and the transmission.
2. Torque‑boosting effect: Under the combined conditions of “high pump impeller speed” and “low turbine speed,” torque increases, resulting in greater start-up and driving torque.
3. Torque converter. When the engine is neither idling nor running, it functions as a fluid coupling, transmitting the engine’s torque to the transmission.
4. Lock-up function: When the turbine speed rises to match the pump wheel speed, the lock-up clutch engages, and the torque converter transmits engine power to the transmission at a 1:1 ratio.
What are the advantages of a torque converter?
1. Excellent automatic adaptability: Depending on the machine’s operating resistance or other working loads, the torque converter can automatically and continuously adjust its speed and torque within a certain range.
2. Extended machine service life: Since the working fluid of a hydraulic torque converter is liquid, it provides vibration damping, significantly reducing dynamic loads in the transmission system.
3. Improved machine traversability: Wave‑drive machines exhibit excellent low‑speed performance and stability, enhancing traction between the machine and the ground.
4. Enhanced machine adaptability: With hydraulic transmission, starting is smooth, continuous variable speed over a wide range is achievable, gear shifting is minimized, and vibration and impact are reduced.
5. Simplified machine operation: The torque converter itself functions as a continuously variable automatic transmission, broadening the prime mover’s power range and allowing for a reduced number of gear ratios in the transmission.
What are the drawbacks of a torque converter?
1. The main drawbacks of the torque converter are its high cost, substantial weight, and low transmission efficiency due to hydraulic losses.
2. Fuel economy and draw efficiency have declined.
3. For medium- and large-sized machines with power exceeding 100 horsepower, hydraulic transmission can significantly enhance productivity.
What are the components of a torque converter?
1. Pump impeller: The pump impeller is connected to the torque converter housing, which in turn is bolted to the flywheel. Since the flywheel is coupled to the crankshaft, the pump impeller always rotates in unison with the crankshaft.
2. Turbine: The turbine is connected to the transmission’s input shaft via splines. The steam turbine is equipped with numerous blades, which are curved in a direction opposite to that of the pump impeller blades.
3. Guide Wheel: The guide wheel is positioned between the pump impeller and the turbine, mounted on a guide‑wheel shaft that is connected to the automatic transmission housing via a one‑way clutch.
Dana torque converter
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