Under what conditions does a cylinder deactivation engine deactivate cylinders?

1 Answers
PaisleyFitz
07/30/25 9:36am
In situations of high fuel consumption, the principle of cylinder deactivation is to shut down one or several cylinders (no ignition or power output) during vehicle operation, with the remaining cylinders providing the necessary power. Below is relevant information: 1. Pros and Cons: Advantages: Effectively reduces fuel consumption during long-distance driving. Disadvantages: High technical requirements increase costs and make it difficult to overcome engine stability issues after cylinder deactivation. 2. Cylinder Deactivation Technology: Fuel is cut off but air intake continues; the fuel injectors stop working while the intake valves remain operational. In theory, this naturally saves fuel. Early Cadillac's "cylinder deactivation" method followed this approach, but it was later abandoned as it proved ineffective in saving fuel or the savings were negligible.
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