2 results about "Variable valve timing" patented technology

The invention aims to provide a camless electrohydraulic variable valve timing system based on a fuel medium, comprising an oil tank, a filter, a high pressure oil pump, a fuel rail, a pressure sensor, a flow regulating valve, an electromagnetic valve and a valve timing rail, wherein the oil tank is connected with the high pressure oil pump via the filter; the high pressure oil pump is connected with the valve timing rail and the fuel rail; the pressure sensor and the flow regulating valve are fixed on the valve timing rail and the fuel rail; and the electromagnetic valve is connected with the valve timing rail. The system in the invention can reduce oil lines, lower arrangement difficulty, omit valve timing parts such as a camshaft, a tappet, a handspike, a rocker and the like, maintain the original cylinder cover structure, and reduce design complexity. The electronic control high pressure common rail injecting technology is fused with the control of parameters such as valve timing angle, valve life, valve open duration and the like, and a high pressure storage is fully utilized to reduce pressure fluctuation of high pressure oil driving the valve to be open.