Audi Engine Cylinder Deactivation Technology

[McArthur]

Audi engine cylinder deactivation technology, also known as variable displacement or cylinder hibernation, is a technology that allows certain cylinders in a multi-cylinder internal combustion engine to stop working, thereby saving fuel to some extent. As is well known, vehicles require relatively less power during medium-low speed steady-state driving, while requiring greater power during acceleration and high-speed driving. Precisely for this reason, engineers have incorporated cylinder deactivation technology into multi-cylinder engines, allowing partial cylinders to be shut down under specific conditions. During its development, cylinder deactivation technology for multi-cylinder engines has mainly adopted three types: 1. Cutting off fuel supply to specific cylinders; 2. Cutting off fuel supply to specific cylinders and stopping their valve movement (thereby reducing pumping losses); 3. On the basis of the second approach, introducing exhaust gas into the deactivated cylinders to maintain thermal balance.