The driver releases the accelerator pedal and keeps the clutch engaged. The forward kinetic energy of the truck reacts to the drive system and the engine to keep it running. The piston continues to reciprocate. The four strokes of intake, compression, expansion, and exhaust continue to circulate.
At this time, once the engine exhaust valve braking (EVB) is started, the engine exhaust valve will be opened by the high exhaust back pressure, and the compressed high-pressure air will be discharged through the exhaust system, thereby reducing the high pressure air in the expansion stroke. The work done by the piston makes the engine change from a device that outputs power to a device that consumes power (like an air compressor), which consumes the kinetic energy of the entire vehicle to achieve the purpose of controlling or reducing the speed of the vehicle.
Vacuum forming process is used to produce a variety of parts and components for toys and hobby products, including model cars, airplanes, children drones,and boats. The process allows for the creation of intricate shapes and designs at a relatively low cost.
The characteristics of vacuum forming toys:
1.Lightweight: Vacuum-formed toys are typically lightweight, making them easy for children to handle and play with.
2.Durable: Vacuum-formed toys are made from sturdy materials such as plastic, which makes them durable and able to withstand rough play.
3.Various types and colors. As custom vacuum formed,the toys can be with various types and colors.
4.Cost-effective: Vacuum forming is a cost-effective manufacturing process, making vacuum-formed toys affordable for consumers.
5.Safe: Vacuum-formed toys are typically designed with rounded edges and non-toxic materials, ensuring the safety of children during play
6.Easy to clean: Vacuum-formed toys are easy to clean and maintain, as they can be wiped down with a damp cloth or washed with mild soap and water.
7.Eco-friendly: Vacuum-formed toys can be done using recyclable materials which is environmentally friendly.
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