Why is secondary ignition not recommended?
2 Answers
Secondary ignition should be determined based on specific circumstances. Performing secondary ignition in water can damage the engine. Here is an introduction about secondary ignition: 1. Definition: It refers to the third-stage rocket engine igniting twice. 2. Extension: Adding a coasting phase without thrust between the two ignitions can save rocket energy and improve payload capacity. 3. Development: As early as 1974, researchers from the Sixth Academy of the Chinese Academy of Sciences began studying this. Achieving secondary ignition of the engine at high altitude is not a simple modification of single ignition technology but represents a significant technological breakthrough.
I used to see my friends frequently attempting to restart the car after it had already been ignited, which is a really bad habit. When the engine is already running, turning the key or pressing the start button again causes the starter's pinion gear to try engaging with the high-speed rotating flywheel ring gear, leading to severe friction and wear. Over time, this can damage the gears, and repairs can be costly. The battery also suffers from additional high current, shortening its lifespan—especially in winter when starting is already difficult, making matters worse. In extreme cases, mechanical conflict might even generate sparks, increasing the risk of accidents. I once experienced this firsthand: the car made loud grinding noises, and later inspection revealed a damaged starter, costing hundreds to fix. The correct practice is to release the operation immediately after starting and listen for the steady engine sound to confirm a successful ignition. Paying attention to these details protects your car's condition and saves money—a win-win situation.
