Energy Compensation Control for Soft Landing of a Novel Electromagnetic Valve
Date Issued
2010
Date
2010
Author(s)
Ye, Da-Hau
Abstract
It is necessary to improve internal combustion engines to achieve high efficiency and reduce pollution. This can be achieved by variable valve timing (VVT) to improve internal combustion engines’s performance. An electromechanical valve (EMV) system can provide free valve timing, compared to the use of cam-drive valve systems; EMV systems can control each valve independently. This thesis develops an EMV system driver and controller to achieve the desired engine valve operation. First, we aim to develop an EMV mechanism that achieves the desired EMV specifications and operating principles, and simulate those by using computer software to create a mathematical model. The purpose is to use different control signals as inputs to simulate an EMV system’s characteristics, and then to try to control those inputs to simulate the system’s performance and observe soft armature landing at various engine speeds to develop a suitable engine control strategy. Hardware is necessary to implement the control strategy; therefore, the thesis develops a driver and controller for EMV hardware architecture. We also develop an energy compensation control strategy and experimentally verify its feasibility to reduce noise and wear and tear and promote valves’ life-span. Eventually, the experimental results present an energy compensation control strategy that can reduce the armature’s landing velocity, which not only enables stable operation at different engine speeds, but also reduces engine noise.
Subjects
variable valve timing
hybrid MMF
soft landing
repetitive learning control
SDGs
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