V-Type Engine Throttle Motor Relocation for Compact Intake Design
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Solution Overview
Problem
The size reduction of internal combustion engines with electronic throttle control devices is hindered by the interference between the throttle driving motor and the air cleaner, making maintenance difficult and increasing intake resistance.
Innovation Solution
The throttle driving motor is positioned outside the region surrounded by throttle bodies, allowing for easier maintenance and reduced intake passage interference, while fuel injection valves are located inside this region to minimize fuel supply line length and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the throttle driving motor is located at a high position near the throttle bodies, then the throttle valve can be controlled effectively, but the air cleaner interferes with the motor and speed reduction gear train, preventing size reduction
Solution Approach 1:
The patent relocates the throttle driving motor from a vertical position near the throttle bodies to a horizontal position at the rear end of the intake passage. This spatial reconfiguration in a different dimension eliminates interference with the air cleaner while maintaining throttle control functionality, allowing the engine overall size to be reduced.
2Reliability
If the air cleaner is spaced apart from the cylinder head cover to avoid interference with the throttle driving motor, then the motor can operate without obstruction, but the engine size cannot be reduced
Solution Approach 1:
The patent extracts the throttle driving motor from its traditional position near the throttle bodies and relocates it to the rear end of the intake passage. This separation removes the motor from the interfering zone between the air cleaner and cylinder head cover, allowing compact engine design without compromising motor operation reliability.
3Device complexity
If the throttle driving motor is positioned centrally near the throttle bodies, then the throttle shafts can be axially connected, but the intake passage becomes non-straight increasing intake resistance
Solution Approach 1:
By relocating the throttle driving motor to the rear end of the intake passage in a different spatial arrangement, the patent enables a substantially straight intake passage configuration. This dimensional change eliminates the need for complex angled connections while maintaining effective throttle shaft connectivity, thereby reducing intake resistance.
Data Source
AI summary
An electronic throttle control device in a internal combustion engine for a vehicle can be improved in maintainability and can be reduced in size. An electronic throttle control device in a V-type internal combustion engine for a vehicle has a fuel injection valve and throttle valves in an intake passage. A throttle driving motor controls the opening angle of each throttle valve according to the amount of operation of a throttle grip performed by an operator of the vehicle. The throttle driving motor is located outside a region surrounded by the throttle bodies that are respectively connected to all of intake ports as viewed in plan.