The operating principle of the camshaft phaser is based on a phase sensor, which is able to detect the camshaft position angle. Inside the phase sensor is a detection coil that senses nearby metal objects. When there is no metal object close by, the detection coil outputs the maximum voltage; however, when a metal object (e.g. camshaft) is close to the probe, the detection coil induces eddy currents on the surface of the metal object, which changes the inductance of the coil, resulting in a lower output voltage. This change in voltage reflects the change in phase, which enables accurate detection of the camshaft position.2 An unreasonable signal from the camshaft phasers can lead to deviations in ignition control, which in turn affects the normal operation of the engine. Therefore, maintaining proper operation of the camshaft phasers is essential to ensure stable and safe engine performance!
Variable camshaft phaser systems, also known as VVT (Variable Valve Timing) systems, optimise engine performance by adjusting the phase of the camshaft relative to the crankshaft to advance or retard valve timing. The advantages of this system are reflected in the following aspects:
Increased air intake: By adjusting valve timing, the variable camshaft phaser system is able to increase air intake and improve charging efficiency, which in turn improves engine power and torque.
Improve fuel economy: Optimising valve timing helps to improve engine fuel economy and reduce fuel consumption.
Reduced emissions: By reducing the residual exhaust gas coefficient and increasing charge efficiency, the system helps to significantly improve idle stability, thereby reducing emissions and meeting environmental requirements.
Improved Idle Stability: The variable camshaft phaser system significantly improves idle stability and provides a more comfortable driving experience. In addition, the system adapts to different driving conditions and load variations, ensuring that the engine achieves optimum performance under different operating conditions. For example, at low revs, the delayed valve timing increases torque output and improves start-up and acceleration, while at high revs, it boosts power output and enhances performance at high speeds.
The camshaft phaser improves fuel efficiency by adjusting the injection advance angle to save fuel. It is an important part of the engine, and the camshaft phaser assembly is packaged in an oil-free, rust-proof package to ensure its performance and protect the environment. The adjustment function of the camshaft phasers mainly relies on the different structures of the HCP-type camshaft phasers and ECP-type camshaft phasers, which reduce unnecessary fuel consumption by precisely controlling valve movement, especially at low speeds or light loads, thereby reducing operating costs.
In addition, the adjustment of camshaft phasers optimises the combustion process and effectively reduces the emission of unburned hydrocarbons and nitrogen oxides, which plays a key role in protecting the environment and meeting stringent emission standards. Therefore, as the cornerstone of modern automotive engine technology, camshaft phasers, with their intelligent adjustment and precise control, achieve a perfect fusion of fuel economy, power performance and environmental performance, bringing drivers an efficient and environmentally friendly driving experience!
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