Electric Inlet Valve Control for Air Compressor Fuel Savings
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Solution Overview
Problem
Conventional air compressors using pneumatic valves require frequent maintenance, are sensitive to cold temperatures due to water condensation in control lines, and consume excessive fuel when idle, as they maintain high pressure without producing output.
Innovation Solution
An electrically powered and controlled inlet valve system that uses a stepper motor or solenoid to regulate airflow, eliminating the need for pneumatic control circuits and allowing for variable output based on demand, with a controller managing the valve position based on pressure, temperature, and other feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pneumatic valves are used to regulate air intake and outflow, then the air compressor can control airflow, but the equipment requires frequent maintenance and is sensitive to cold temperatures
Solution Approach 1:
The patent replaces the pneumatic valve system with an electrically controlled valve system. The electric inlet valve is controlled by a controller that receives feedback from pressure sensors, eliminating the need for pneumatic control circuits. This substitution resolves the maintenance issues associated with pneumatic valves while maintaining reliable airflow control.
2Ease of operation
If pneumatic control circuits are used, then the inlet valve can be controlled, but water condensation in control lines causes freezing issues in cold temperatures
Solution Approach 1:
The patent eliminates pneumatic control circuits by implementing direct electrical control of the inlet valve through a controller. This removes the control lines that were susceptible to water condensation and freezing, while maintaining full valve control capability through electrical signals and feedback from pressure sensors.
3Stress or pressure
If the compressor maintains high pressure continuously, then pressure output is ensured, but fuel consumption increases excessively when idle
Solution Approach 1:
The patent implements dynamic pressure control where the controller adjusts the inlet valve position based on real-time pressure feedback from sensors. This allows the compressor to maintain required pressure output only when needed, rather than operating continuously at high pressure, thereby reducing fuel consumption during idle periods while ensuring pressure availability when demanded.
Solution Approach 2:
The patent employs a feedback control system where pressure sensors monitor the system pressure and provide signals to the controller. The controller uses this feedback information to adjust the inlet valve position, creating a closed-loop control system that maintains pressure output only when necessary, optimizing fuel consumption by avoiding continuous high-pressure operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces maintenance needs, prevents water freezing issues in cold temperatures, and lowers fuel consumption by allowing the compressor to operate only when needed, with precise control over airflow and pressure.
Implementation Method 1
an electric current powering a stepper motor (or, in some examples, a linear solenoid or other electric powered motion device) is used to open and/or close an air passage
Implementation Method 2
an electric current powering a stepper motor (or, in some examples, a linear solenoid or other electric powered motion device) is used to open and/or close an air passage
Implementation Method 3
The change in position of the mechanical valve on the inlet side of the compressor pump restricts inlet airflow to the pump. The inlet airflow restriction produces an outlet flow/pressure reduction of the fixed displacement rotary screw pump.
Implementation Method 4
rotary screw compressor based on one or more control signals
Data Source
AI summary
Systems and methods for an air compressor control system includes a user interface configured to receive a command from an operator, a sensor configured to measure one or more characteristics of the system, an electric inlet valve integrated within an air compressor and configured to regulate airflow of the air compressor based on a position of the electric inlet valve, and a controller configured to adjust a position of the electric inlet valve via an electrical control signal in response to a command from the user interface or a measurement from the sensor.