1, herringbone gear: Andre Citroen bought out the invention patent of herringbone gear and applied it to the transmission system of Citroen automobile to improve the transmission efficiency and performance of the vehicle.
2. Precursor technology: Andre Citroen used the precursor technology for the first time when designing a car, that is, transmitting the power of the engine to the front wheels, making the driving of the vehicle more flexible and stable.
3. Hydraulic-pneumatic linkage suspension system: Citroen automobile adopts the hydraulic-pneumatic linkage suspension system invented by Andre Citroen, which provides more comfortable and stable suspension effect through hydraulic-pneumatic linkage.