Sliding valve type two-mode engine intake valve delaying shutdown system

Abstract

The present invention discloses a delayed closing system of an intake valve of a double-mode slide valve engine. The delayed closing system comprises a base, a hydraulic tappet assembly and an oil supply system; wherein, the hydraulic tappet assembly can slide up and down along the base; the top of the hydraulic tappet assembly is connected with a valve rocker; the lower end of the hydraulic tappet assembly is connected with an engine camshaft; the oil supply system supplies oil to the hydraulic tappet assembly; an oil-feeding assembly hole and oil-discharging assembly holes are formed on the hydraulic tappet assembly; an oil-feeding hole, one end of which is communicated with the oil supply system and the other end of which is communicated with the oil-feeding assembly hole of the hydraulic tappet assembly, is formed on the base; and oil-discharging holes, which are correspondingly communicated with the oil-discharging assembly holes of the hydraulic tappet assembly, are formed on the base as well. The delayed closing system, which has the advantages of few parts, simple structure, safe and reliable operation and low cost, can realize the mutually independent adjustment of the intake and exhaust of cylinders in order to exert the flexibility of intake phase adjustment to the max and optimize the performance of the engine, the operation process is controlled by a mechanic slide valve mode, the service lives of the elements are long, and the industrialization of the technique can be easily realized.

Description

technical field [0001] The invention relates to a control of a valve of an internal combustion engine. In particular, it relates to a sliding valve type two-mode delayed closing system for an engine intake valve with few system parts, simple structure and safe and convenient mechanical control. Background technique [0002] Traditional piston four-stroke engines generally use a mechanical camshaft to drive the valve train of the intake and exhaust valves. The movement of the valves is controlled by the mechanical transmission between the crankshaft and the camshaft, and between the camshaft and each valve. This mechanical mechanism has long proven to be simple, effective, reliable, and relatively inexpensive. However, such parameters as the opening time and phase of the valve mechanism are fixed and cannot be adjusted during engine operation. The work lacks flexibility and the timing cannot be changed under different conditions, so the engine performance potential cannot b...

AI Technical Summary

Problems solved by technology

Since the intake and exhaust camshafts of high-power diesel engines are divided into two types: "top-mounted" and "side-bottom-mounted", the "side-bottom-mounted" camshaft makes the engine structure simple and the manufacturing cost is low, so it is widely used at present. The exhaust valves are driven by the same camshaft, it is difficult to adjust the intake and exhaust valves separately, so the variable valve technology for high-power diesel engines needs to be developed

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