Views: 21 Author: Site Editor Publish Time: 2020-05-19 Origin: Site
The exhaust valve opens early and closes at night, and uses the pressure of the exhaust gas to discharge more exhaust gas. The intake valve opens early. When the piston descends, there is a larger valve lift height to reduce intake resistance; late intake valve closing can use the inertia of the airflow to charge more air. The actual opening and closing time and duration of