This paper holds a discussion on methods of adjusting in line engine valves and recommends a new method for that.

Adjustment of valves clearance for the in-line, V-type and number multi-cylinder engines is able to be completed only by rotating an engine twice and summed up in a pithy formula.

This paper discusses the idea and the basic method of applying the multi-mode intelligent control technique to electronically controlled hydraulic throttle actuator (EHTA) of automotive engine.