Side-Injector EFI Throttle Body for Compact Dual-Quad Mounting
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Solution Overview
Problem
Existing bolt-on electronic fuel injection (EFI) throttle bodies emulate carburetor designs, resulting in a length that exceeds the width, which complicates mounting and requires a compact front-to-back dimension for proper installation, especially in dual-quad configurations.
Innovation Solution
The EFI throttle body features a compact design with a width greater than the length, incorporating angled air intake passages and fuel injectors positioned along the sides, hidden from view by walls, and a fuel rail perpendicular to the valve shaft, along with a streamlined ECU box and integrated sensors, allowing for efficient mounting and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If EFI throttle bodies are designed to approximate carburetor designs, then the appearance and basic functionality are maintained, but the length exceeds the width making mounting difficult and requiring excessive front-to-back dimension
Solution Approach 1:
The patent reorients the fuel rail passage from a longitudinal orientation (parallel to valve shaft) to a transverse orientation (perpendicular to valve shaft). This dimensional change allows the fuel injectors to be positioned on the side of the throttle body rather than at the front, effectively swapping the length and width dimensions and achieving a compact front-to-back profile suitable for dual-quad mounting
2Ease of manufacture
If fuel injectors are positioned at the front of the throttle body, then fuel delivery is simplified, but the front-to-back dimension increases complicating installation in dual-quad configurations
Solution Approach 1:
The fuel rail passage is reoriented from longitudinal to transverse, moving the fuel injection point from the front of the throttle body to the side. This allows the fuel delivery system to remain simple while reducing the front-to-back dimension to accommodate dual-quad installations
3Ease of repair
If components are exposed on the throttle body, then accessibility for maintenance is improved, but the appearance becomes cluttered and less clean
Solution Approach 1:
The fuel rail and fuel injectors are nested within a recess or cavity in the throttle body, with a wall shrouding them from side view. This nested arrangement hides the components for a clean appearance while maintaining accessibility through strategic exposure of portions of the electrical connector and fuel injector
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 compact design facilitates easy installation in dual-quad configurations, enhances performance through optimized fuel delivery, and provides a cleaner appearance by hiding components, while maintaining efficient fuel injection and sensor integration.
Implementation Method 1
Each of the plurality of orifices is angled downward and at an angle to a radial direction
Implementation Method 2
At least one fuel injector is positioned to inject fuel into the passage
Implementation Method 3
The valve rotates about an axis defined by a shaft
Data Source
AI summary
An electronic fuel injection throttle body unit has a core body with two side components. The two side components each including a fuel delivery passage. Four air intake passages extending vertically through the throttle body. Valves are rotatable within the air intake passages. The valves being connected to valve shafts that rotate about respective valve shaft axes. The valve shaft axes and the fuel delivery passages are perpendicular to each other.