
CHEMPOL 4690 is a high-performance Dual Clutch Transmission (DCT) fluid additive package engineered to meet the unique requirements of modern DCT systems, which combine the efficiency of manual transmissions with the convenience of automatics. DCT systems are characterized by the presence of two clutch sets, a hydraulic control system, and an additional shift control mechanism, making their lubrication needs more complex than traditional gearboxes.
CHEMPOL 4690 is specially formulated to deliver balanced frictional performance, gear wear protection, and hydraulic system compatibility. It ensures smooth gear engagement, optimal clutch operation, and efficient pressure transfer across both clutch sets and the hydraulic circuit, which is critical for the performance & and longevity of dual-clutch systems.
CHEMPOL 4690 enables the formulation of w-high quality DCT fluids when blended with suitable Group III base stocks and PMA-based viscosity index improver (CHEMPOL 5403), delivering the critical balance of frictional performance, anti-wear protection, and thermal stability required for smooth, efficient, and long-lasting transmission operation.
| ITEM, TEST METHOD | SPECIFICATION | TYPICAL |
|---|---|---|
| Appearance, Visual | Brown Viscous Liquid | Brown Viscous Liquid |
| Kinematic Viscosity (100℃) mm2/s, ASTM D445 | 100-160 | 130 |
| Density (15℃), kg/m3, ASTM D4052 | 900-970 | 925 |
| Flash Point (COC), ℃, ASTM D92 | ≥140 | <180 |
| B Content, ppm, ASTM D5185 | 1100-1450 | 1200 |
| P Content, m%, ASTM D5185 | 0.22-0.30 | 0.26 |