Self-regulating variable valve control system and method for compression ignition engine burning multiple fuels

Abstract

The invention discloses a self-adjustment variable valve control system for a compression ignition engine combusting multiple kinds of fuel. The system comprises a variable valve system, the compression ignition engine capable of combusting multiple kinds of fuel, an inflow air heating device, an ECU, a vibration sensor, an inflow air temperature sensor, an exhaust port position temperature sensor and a rotation speed sensor, wherein the vibration sensor, the inflow air temperature sensor, the exhaust port position temperature sensor and the rotation speed sensor are attached to an air cylinder. The compression ignition engine can combust various fuel including gasoline and diesel. The variable valve system is a double variable valve and can be subjected to stepless control through the ECU within a certain angle range. The ECU collects signals of the sensors, the rough properties of the fuel combusted by the engine can be judged through comprehensive treatment, and then the variable valve system is controlled to make the corresponding control strategy. According to the system, the optimization of the variable valve system control strategy of the compression ignition engine combusting different kinds of fuel can be ensured, and accordingly safe and efficient running of the engine are ensured.

Description

Technical field [0001] The present invention designs the field of internal combustion engines, and particularly relates to a variable valve system control strategy for an engine that uses a camless variable valve system and can burn multiple fuels. Background technique [0002] The internal combustion engine is still the prime mover with the highest thermal efficiency and the highest power per unit volume and weight, and is still widely used. In response to the energy saving and emission reduction of internal combustion engines, variable valve technology has been widely used in engines. Variable valve technology is currently mainly divided into camshaft-based variable valve technology and camless valve technology. The former has a fast response speed, but because it retains the cam, the valve cannot be arbitrarily changed. The camless variable valve technology can arbitrarily change the valve timing, lift and duration. Therefore, it has received widespread attention, and because...

AI Technical Summary

Problems solved by technology

However, in order to achieve high-efficiency and safe combustion, different types of fuels require different control strategies for variable valves.

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