This mechanism employs a clutch that engages automatically based on engine speed. At low speeds, the clutch remains disengaged, allowing the engine to run without driving the output shaft. As engine speed increases, centrifugal force acts upon weights within the clutch, causing them to move outward and engage with the clutch drum. This action transfers power through a belt to the driven component. A common application is in small engines powering equipment like go-karts, mini-bikes, and some lawnmowers, where smooth starting and engagement are desirable.
Automatic engagement simplifies operation and protects the engine from stalling under load at low speeds. This automatic operation eliminates the need for complex manual clutching systems, making the system suitable for applications requiring simple and reliable power transmission. Its development stemmed from the need for a more user-friendly and efficient method of transferring power in small engine applications, particularly where frequent starting and stopping are required. This facilitated the wider adoption of such engines in various consumer and industrial products.
