Automatines dežės hidrtransformatoriaus blokavimas čia ta funkcija, kuri dažnai būna palaikoma papildomu bėgiu, kai apsukos nukrenta 2-300 rpm ir momentines nukrenta litru, bet kaip sakiau, reikalingas tam tikras greitis jį pasiekti.


Lock-up torque converters
As described above, impelling losses within the torque converter reduce efficiency and generate waste heat. In modern automotive applications, this problem is commonly avoided by use of a lock-up clutch that physically links the impeller and turbine, effectively changing the converter into a purely mechanical coupling. The result is no slippage, and virtually no power loss.
The first automotive application of the lock-up principle was Packard's Ultramatic transmission, introduced in 1949, which locked up the converter at cruising speeds, unlocking when the throttle was floored for quick acceleration or as the vehicle slowed down. This feature was also present in some Borg-Warner transmissions produced during the 1950s. It fell out of favor in subsequent years due to its extra complexity and cost. In the late 1970s lock-up clutches started to reappear in response to demands for improved fuel economy, and are now nearly universal in automotive applications.