Throttle Control Device Mode Switching Logic

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing throttle control devices require complex arithmetic processing for mode changes and lack clear timing for control mode changes, leading to unclear operation for the rider and potential excessive torque fluctuations.

Innovation Solution

A throttle control device with a sensor for detecting operation amounts, a control device to adjust the throttle valve, a memory device for storing control modes, a change-over instruction device, and a judgment device that allows mode changes only when the operation amount is within predetermined limits, eliminating the need for calculating opening degree differences and ensuring clear mode change timing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the throttle control device calculates the opening degree difference between targeted throttle opening degrees in different control modes to prevent excessive torque fluctuations, then the reliability of mode switching is improved, but the device complexity and arithmetic processing requirements increase

Engineering Contradiction:

Improvemode switching reliabilityVSAvoidcontrol device complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent pre-calculates and stores permissible opening degree differences for various engine rotation speeds in a lookup table during the design phase. This preliminary action eliminates the need for real-time arithmetic processing during mode switching, as the control device only needs to retrieve pre-computed values based on the current engine speed, thereby resolving the contradiction between ensuring reliable mode switching and reducing device complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the control parameter from dynamically calculating opening degree differences to using pre-stored permissible difference values that are selected based on engine rotation speed. This parameter change transforms a complex arithmetic operation into a simple table lookup operation, reducing computational requirements while maintaining the reliability of preventing excessive torque fluctuations

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If the throttle control device requires judgment processing to determine whether opening degree difference is within permissible limits, then the stability of engine torque is improved, but the loss of time for mode change operation increases

Engineering Contradiction:

Improveengine torque stabilityVSAvoidmode change time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent pre-determines and stores permissible opening degree differences for various engine rotation speeds before actual operation. During mode switching, the control device only needs to retrieve the pre-stored permissible difference corresponding to the current engine speed and compare it with the actual difference, eliminating complex real-time judgment processing and significantly reducing mode change time while maintaining torque stability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex real-time arithmetic judgment mechanisms with a simpler table lookup and comparison mechanism. By substituting the mechanical/computational judgment process with a pre-computed lookup table approach, the system reduces processing time while maintaining the stability function

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If the throttle control device performs complex arithmetic processing to determine control mode change timing, then the precision of mode change control is improved, but the productivity of mode switching operation decreases

Engineering Contradiction:

Improvemode change control precisionVSAvoidmode switching speed

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent pre-calculates permissible opening degree differences for various engine rotation speeds during the design phase and stores them in a lookup table. This preliminary action allows the control device to achieve precise mode change control simply by retrieving pre-computed values based on current engine speed, eliminating the need for complex real-time arithmetic processing and significantly improving mode switching speed while maintaining control precision

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8516992B2Throttle control device and vehicle equipped with the same

Publication Date: 2013.08.27 YAMAHA MOTOR CO LTD

AI summary

In some embodiments, a throttle control device includes an axel 43 for opening and closing a throttle valve 41, an axel sensor 52 for detecting an operation amount of the axel 43, a throttle control portion 71 for controlling the throttle valve 41, a memory portion 72 for storing a plurality of control modes 81, 82, and 83 in which a targeted throttle opening degree for the operation amount is determined, a change-over switch 122 for instructing the changing of the control mode, a judgment portion 73a for judging whether or not the operation amount of the axel 43 is equal to or less than the predetermined operation amount, and a changing portion 73b for changing the control mode when the switch 122 is operated and the operation amount of the axel 43 is equal to or less than the predetermined operation amount.