Solenoid Valve Actuation Control with Single-Pin Current Profile Decoding
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Solution Overview
Problem
Existing systems for controlling solenoid valves in internal combustion engines are inefficient and lack a streamlined method for actuation control, leading to increased complexity and costs.
Innovation Solution
A method and system for controlling solenoid valves using a combined selection and control signal that decodes electric current profiles and control codes, allowing efficient actuation through a single input pin, reducing package size and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dedicated ASIC is used to control solenoid valves with multiple current profiles, then the engine performance can be optimized, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple control functions (current profile selection, pulse generation, and valve control) into a single integrated ASIC device. The controller receives a combined signal containing both selection information for the current profile and control information for valve actuation, eliminating the need for separate control circuits and reducing overall system complexity despite maintaining multiple current profile capabilities.
Solution Approach 2:
The ASIC is designed to handle multiple current profiles and various control operations through a universal control mechanism. A single controller can select from multiple stored current profiles and generate appropriate drive signals for different operating conditions, making the device multi-functional without requiring separate dedicated circuits for each function.
2Measurement precision
If multiple control signals and current profiles are implemented, then the control precision is improved, but the package size and system complexity increase
Solution Approach 1:
The patent merges multiple control signals into a single combined signal that contains both selection information (for choosing the current profile) and control information (for valve actuation). This single combined signal is processed by the ASIC to generate the appropriate solenoid drive signal, reducing the number of external connections and package size while maintaining precise control capabilities.
3Reliability
If separate control circuits are used for each solenoid valve, then the reliability is improved, but the device complexity and cost increase
Solution Approach 1:
The ASIC is designed as a universal controller that can manage multiple solenoid valves through a single control interface. The device stores multiple current profiles and can selectively apply them to control different valves based on the received signal, providing reliable control without requiring separate control circuits for each valve, thus reducing overall system complexity.
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
The solution enables efficient and reliable actuation of solenoid valves with reduced costs and increased reliability by utilizing a single input pin, simplifying the ASIC implementation of the valve controller.
Implementation Method 1
These injector valves are each typically driven by a solenoid. That is, a solenoid controls the opening and closing of the valve.
Data Source
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AI summary
An engine control system and method utilizes a processor and a valve controller in communication with the processor. A valve having a solenoid is in communication with the valve controller. The valve controller is configured to receive a combined selection and control signal from the processor, decode a desired electric current profile encoded in the signal, sense a control code encoded in the signal, and operate the solenoid in accordance with the decoded desired electric current profile in response to sensing the control code.