Evolution of Volkswagen’s new wet dual-clutch gearbox from 0 to 1

Although the inventor of the dual-clutch gearbox is not Volkswagen, there is no doubt that the role of Germans in popularizing it. With the increasing sales of related models, some problems have also been exposed. On the other hand, most countries and regions, including China, have gradually upgraded their emission standards. For this reason, Volkswagen is constantly upgrading its dual-clutch gearbox. Today, let’s take a look at the latest "upgrade from 0 to 1".

○ Until today, the industry has not yet reached a conclusion about who invented the dual-clutch gearbox. Germans are proud of being the first to apply for patents, while French are proud of small-scale production;

○ Specific to the Volkswagen brand, the golf R32 in 2002 is the beginning of our familiar story;

○ Volkswagen Group took the lead in developing and producing a wet dual-clutch gearbox, and then introduced a dry dual-clutch gearbox to meet the needs of low-grade models.

Before launching the technical upgrade, let’s briefly review the current use of the dual-clutch gearbox of Volkswagen Group. In short, according to the horizontal and vertical layout of the powertrain, they named the dual-clutch gearbox DQ and DL respectively. Secondly, according to the tolerable torque, it is subdivided into different models.

Some dual clutch gearbox models of Volkswagen GroupWell-known dry/wet gears are equipped with DQ200 dry 7-speed golf 6DQ250 wet 6-speed DQ380 wet 7-speed DQ381 wet 7-speed DQ500 wet 7-speed Audi RS3DQ400e wet 6-speed GTEDL382 wet 7-speed DL501 wet 7-speed Volkswagen DL800 wet 7-speed, Lamborghini Huracán

The "upgrade from 0 to 1" we are going to talk about today is DQ380 and DQ381. Although both of them have been on the market for some time, their development concept will be gradually extended to other products in the DQ family, so they can be regarded as the embryonic form of the development of Volkswagen dual-clutch gearbox technology in the future.

The oil pressure of DQ380 gearbox is based on the mechanical gearbox oil pump, and the engine crankshaft drives the gearbox oil pump. After the engine stopped working, the oil pump lost power. When the driver needs to start again, the traditional mechanical oil pump needs to build up the pressure again, and there will be some delay.

DQ381 adds an electric motor oil pump, and the power comes from a 12V battery pack, so that there is still a power source after the engine is turned off, and the response speed of the vehicle will be faster.

In terms of oil, considering the factors such as reducing friction and emission, DQ381 gearbox oil is thinner than DQ380 gearbox oil, and its formula is slightly adjusted considering the requirements of heat dissipation, lubrication and force transmission.

Written in the back:

The congestion environment in the city has gradually shrunk the sales of manual gearboxes, and the corresponding market share of AT, CVT and DCT has greatly increased compared with 10 years ago. Among them, DCT, the dual clutch gearbox, is favored by manufacturers and consumers because of its relatively low manufacturing cost and compact structure. It takes time for technology to develop and mature. Volkswagen’s dual-clutch gearbox has problems in popularization, and it is also improved in step-by-step upgrade iteration.