The Camless Engine – UnderhoodService

The Camless Engine

The FreeValve concept, also known as fully variable valve actuation, eliminates the camshaft. Instead of lobes on a camshaft, there are electromagnetic or electrohydraulic actuators to open the poppet valves.

0-dsc_0978-editThe FreeValve concept, also known as fully variable valve actuation, eliminates the camshaft. Instead of lobes on a camshaft, there are electromagnetic or electrohydraulic actuators to open the poppet valves.

The timing and lift of the intake and exhaust valve can be controlled with a module instead of a chain. The system can then “decide” based on driving conditions which one to use to maximize performance or minimize fuel consumption and emissions. The other benefit is the elimination of the camshafts and the chain of belts. This can reduce noise and allows the engineer to create a more compact engine. For more information, visit freevalve.com.

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What if there are no codes and a misfire is intermittent? This is where it gets complicated.

What is a misfire? Is a misfire when the cylinder does not fire? Is it when the cylinder fires too soon or too late? The answer is “yes” to both questions. Some misfire complaints are a flashing check engine light, and a P0300 to P0312 diagnostic trouble code (DTC) indicates that one or more cylinders are misfiring. This is the easiest misfire to diagnose. But, what if there are no codes and a misfire is intermittent? This is where it gets complicated. 

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