Electromagnetic Throttle Actuator for Compact Precise Valve Control
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Solution Overview
Problem
Existing throttle control systems in internal combustion engines lack efficient and compact mechanisms to adjust the throttle valve position in response to accelerator operation and varying engine conditions.
Innovation Solution
A throttle drive actuator comprising a rotor and stator with magnetic fields and an armature, which uses electromagnetic forces to rotate the throttle valve, allowing precise control of air intake through the throttle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a motor is used to control the throttle valve, then the throttle valve can be adjusted in response to accelerator operation and engine conditions, but the device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical linkages and cable systems with an electromagnetic actuator comprising a stator, rotor, and armature. This substitution eliminates complex mechanical transmission components while achieving precise throttle valve control through electromagnetic forces, directly resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The electromagnetic actuator serves multiple functions: it provides precise throttle control, maintains idle position stability through magnetic field interaction, and responds to varying engine conditions through electrical signal control. This multi-functionality consolidates what would otherwise require separate mechanical systems into a single integrated device, reducing overall complexity while enhancing adaptability
2Volume of moving object
If a compact actuator is designed with a thin profile, then the device size is reduced, but the magnetic field strength and rotational force may be compromised
Solution Approach 1:
The patent employs a thin-profile actuator design where the magnetic field components are arranged in a compact, space-efficient configuration. The stator and rotor are positioned in close proximity with optimized air gaps, allowing the generation of sufficient magnetic flux density within a reduced volume, thus maintaining rotational force while achieving a compact form factor
Solution Approach 2:
The actuator utilizes composite magnetic structures combining different magnetic materials with varying permeability and coercivity characteristics. This allows the design of a compact magnetic circuit that concentrates flux effectively, generating adequate rotational force within a thin profile by optimizing material properties rather than increasing size
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 actuator provides rapid and precise adjustment of the throttle valve position, achieving up to 75-80 degrees of motion with a thin profile, enabling efficient engine control with minimal mechanical complexity.
Implementation Method 1
The stator is positioned adjacent the rotor, and is configured to provide a magnetic field to rotate the rotor to open a close an air passage of the throttle body of the engine
Implementation Method 2
A throttle drive actuator comprising a rotor and stator with magnetic fields and an armature, which uses electromagnetic forces to rotate the throttle valve
Data Source
AI summary
A throttle drive actuator for an engine includes a rotor and a stator. The rotor connects with a valve of a throttle body to rotate the valve, to open a close an air passage of the throttle body of the engine.