What are the differences between dq380 and dq381?
1 Answers
The differences between dq380 and dq381 lie in the fact that dq381 can reduce engine wear and lower fuel consumption compared to dq380 in terms of performance. Here are the relevant details: 1. In the dq380, the oil pump gear meshes with the clutch gear and is powered by the clutch. Therefore, as long as the clutch is engaged, the oil pump operates, creating oil pressure. This means that under any condition, a portion of the engine's kinetic energy is consumed. In contrast, the dq381's oil pump does not mesh with the clutch but has a dedicated power source. It operates only when oil pressure is needed and stops when not in use, thereby reducing the oil pump's consumption of the engine's kinetic energy. In theory, this also reduces emissions and achieves the goal of lowering fuel consumption. 2. Compared to the dq380, the dq381 incorporates several changes, including the use of lower-viscosity ATF oil, friction optimization for seals and bearings, as well as modifications to the clutch module and hydraulic pump system. In the clutch module, the K1 return spring has been changed from a helical type in the dq380 to a diaphragm type. On the hydraulic side, an additional electric oil pump linked to the CAN bus has been added, controlled via valve adjustments. This supports the hydraulic circuit for clamping the clutch plates and operating the shift mechanism. The oil can also flow to the pressure circuit for lubricating and cooling the shafts, gears, and clutch plates. With the addition of the electric oil pump, the transmission can continue to supply oil to components during start-stop operation and coasting mode without being affected by engine speed, improving the responsiveness of clutch re-engagement when the engine restarts.
