Straddle Vehicle Cruise Control Deceleration Logic

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing control devices for straddle-type vehicles often release constant-speed running control unexpectedly when the rider operates the accelerator in the closing direction, requiring the rider to perform a troublesome operation to re-engage the control, which can disrupt smooth driving, especially during overtaking maneuvers.

Innovation Solution

A control device with a first storage means for storing a target vehicle speed and a first detection means to detect the accelerator's operation in a further closing direction, which triggers a deceleration processing to decrease the target vehicle speed, allowing the rider to maintain control while gripping the accelerator and preventing unexpected release of constant-speed running control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the constant-speed running control is released when the accelerator is operated in the closing direction, then the rider's intention to decrease vehicle speed can be detected, but the constant-speed running control is unexpectedly released during overtaking maneuvers

Engineering Contradiction:

Improvedetection of rider's intention to decrease vehicle speedVSAvoidstability of constant-speed running control

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating the treatment of accelerator operations based on their direction: closing-direction operations (deceleration) are detected without releasing control, while opening-direction operations (acceleration) maintain normal control behavior. This localized differentiation allows the system to respond appropriately to specific rider intentions while preserving overall control stability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent inverts the conventional logic by not releasing constant-speed running control when the accelerator is operated in the closing direction, contrary to traditional designs. Instead of treating closing-direction operation as a control release condition, the system interprets it as a deceleration command within the constant-speed control framework, thereby preventing unexpected control loss during overtaking.

Inventive Principle:

Principle #13The other way round (Inversion)

2Speed

If the constant-speed running control is released when the accelerator is operated in the closing direction, then the vehicle speed can be decreased, but the rider must perform troublesome operations to re-engage the control

Engineering Contradiction:

Improvevehicle speed decrease capabilityVSAvoidoperational burden on rider

Core Design Contradiction:

SpeedVSEase of operation

Solution Approach 1:

The system provides self-service by automatically maintaining constant-speed running control during deceleration operations, eliminating the need for the rider to manually re-engage the control after speed adjustments. The control system autonomously interprets closing-direction accelerator operations as deceleration commands and continues managing vehicle speed without requiring rider intervention to reactivate the feature.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent ensures continuity of useful action by keeping the constant-speed running control active throughout the deceleration process. Rather than interrupting and requiring re-engagement, the control system continuously manages vehicle speed even when the rider operates the accelerator in the closing direction, ensuring uninterrupted assistance and reducing operational steps.

Inventive Principle:

Principle #20Continuity of useful action

3Speed

If the rider operates the accelerator in the closing direction to decrease vehicle speed, then the speed adjustment is achieved, but the constant-speed running control is unexpectedly released

Engineering Contradiction:

Improvevehicle speed adjustmentVSAvoidsmoothness of constant-speed control maintenance

Core Design Contradiction:

SpeedVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by creating a specialized response for closing-direction accelerator operations that differs from other control conditions. This localized handling ensures that deceleration commands are processed smoothly within the constant-speed control framework, maintaining control continuity while achieving speed adjustment without unexpected releases.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP2075152B1Control device for straddle-type vehicle and straddle-type vehicle

Publication Date: 2011.05.11 YAMAHA MOTOR CO LTD

Figure 1
Figure 2
Figure 3

AI summary

A control device 100 for a straddle-type vehicle includes: a first storage part 101 for storing a target vehicle speed of a constant-speed running control; and a first detection part 104 for detecting that an accelerator 12 is operated in a further closing direction from a totally closed position of the accelerator 102. Further, the control device 100 for a straddle-type vehicle includes a deceleration processing part 105 that decreases the target vehicle speed stored in the first storage part 101 when the first detection part 104 detects the operation during the constant-speed running control.