Fully variable valve train with rotary plunger for internal combustion engine

A fully variable valve train for an internal combustion engine, the fully variable valve train comprising:

• an oil reservoir;
• a high-pressure oil rail in fluid communication with the oil reservoir via a supply pipe;
• and
• a hydraulic cylinder including:
• a high-pressure oil inlet pipe adapter in fluid communication with the high-pressure oil rail via an oil inlet pipe;
• a high-pressure oil return pipe adapter in fluid communication with the oil reservoir via an oil return pipe;
• a rotary plunger disposed in a rotary plunger chamber;
• and
• an adjusting plunger disposed in an adjusting plunger chamber;
• an oil-inlet timing driven electromagnetic valve arranged in the oil inlet pipe;
• an oil-return timing driven electromagnetic valve arranged in the oil return pipe;
• and
• an electronic control unit (ECU) connected to the oil-inlet timing driven electromagnetic valve and the oil-return timing driven electromagnetic valve,
• wherein the adjusting plunger chamber comprises an upper end including a first adjustable plug, and an adjusting spring mounted between the first adjustable plug and the adjusting plunger, and
• wherein the rotary plunger comprises an upper end including a plunger head, and a lower end including a gear engaged with a rack configured to rotate the rotary plunger.