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Technical Paper

Frequency Conversion Controlled Vapor Recovery System by Temperature and Flow Signals: Model Design and Parameters Optimization

2013-09-24
2013-01-2348
Current gasoline-gas vapor recovery system is incomplete, for it cannot adjust the vapor-liquid ratio automatically due to the change of working temperature. To solve this problem, this paper intends to design a new system and optimize its parameters. In this research, variables control method is used for tests while linear regression is used for data processing. This new system moves proportion valve away and adds a DSP control module, a frequency conversion device, and a temperature sensor. With this research, it is clearly reviewed that the vapor-liquid ratio should remains 1.0 from 0 °C to 20 °C as its working temperature, be changed into 1.1 from 20 °C to 25 °C, be changed into 1.2 from 25 °C to 30 °C, and be changed into 1.3 when the working temperature is above 30 °C.
Technical Paper

High Performance Actuation System Enabled by Energy Coupling Mechanism

2013-09-24
2013-01-2344
This paper introduces a high performance actuation mechanism to enable new systems and improve the performance and efficiency of existing systems. The concept described is based on coupling energy storage mechanisms with translational movement to increase the speed and controllability of linear actuators. Initial development is a high speed linear actuator for hydraulic proportional valves, and the concept can be extended into other applications. With high speed proportional valves, the performance of existing cam phasing systems can be improved or the actuation mechanisms can be applied directly to IC engine valve actuation. Other applications include active suspension control valves, transmission control valves, industrial and commercial vehicle fluid power systems, and fuel injection systems. The stored actuation energy (such as a rotating mass) is intermittently coupled and decoupled to produce linear or rotary motion in the primary actuator.
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