Variable Flow Valve Position Control for Turbocharger Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current valves in turbocharger systems of internal combustion engines lack active control over valve position, leading to inadequate control of turbo speeds, increased turbo response time, and reduced fuel efficiency.
Innovation Solution
A variable flow valve, such as a compressor recirculation valve, with a position sensor and control port system that allows for precise control of the valve's position, enabling active control of turbocharger speeds by communicating with a controller to manage the opening and closing of the valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional open or closed valve operation is used, then the valve structure is simple, but the control precision of turbo speeds is insufficient and turbo response time is increased
Solution Approach 1:
The valve system transitions from static open/closed positions to dynamic variable positioning capability. The piston can be held at intermediate positions between fully open and fully closed, enabling continuous adjustment of the discharge port opening degree. This dynamic positioning allows precise control of compressor air flow and turbo speeds, directly resolving the contradiction between control precision and system complexity.
Solution Approach 2:
A position sensor is integrated into the valve assembly to detect the actual position of the piston/primary valve. This sensor provides feedback signals to the controller, enabling closed-loop control of the valve position. The feedback mechanism ensures precise and repeatable positioning while maintaining system simplicity through electronic control, directly addressing the technical contradiction.
2Loss of time
If traditional valve operation is used, then the device complexity is low, but the turbo response time is increased and fuel economy deteriorates
Solution Approach 1:
The variable flow valve system enables preliminary positioning of the piston to optimal intermediate positions before full operation is required. By pre-positioning the valve at partial opening degrees, the system can rapidly respond to load changes without the lag associated with transitioning from fully closed to fully open positions. This preliminary action capability significantly reduces turbo response time while the electronic control keeps added complexity manageable.
3Measurement precision
If the valve is held in partially open position, then the turbo speed control precision is improved, but the device complexity increases due to position sensor and controller
Solution Approach 1:
The system replaces complex mechanical linkage and cable mechanisms with electronic control components (position sensor and controller). The position sensor provides precise electrical signals about valve position, and the controller processes these signals to actuate the piston accurately. This substitution of mechanical systems with electronic ones achieves high precision turbo speed control while keeping the overall system complexity manageable through modern electronic control architecture.
Data Source
AI summary
A variable flow valve with position feedback is disclosed. The variable flow valve includes a housing having an inlet port and a discharge port and one or more control ports, and also includes a piston connected to a primary valve to open and close fluid communication between an inlet port and a discharge port of the housing. The housing and the piston intermesh to define an inner chamber and an outer chamber each in fluid communication with its own control port. A control port valve opens and closes at least one of the control ports to control access to a source of pressure change. A position sensor is part of the position feedback and communicates the position of the primary valve, relative to the discharge port, to a controller that operates the control port valve to hold the primary valve in a position where the discharge port is partially open.