Motorcycle Hold Control Cancellation by Road Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Motorcycles, unlike four-wheeled vehicles, cannot stand on their own when stopped, requiring riders to support the vehicle with their feet, making operations like canceling holding control complicated.
Innovation Solution
A controller that switches between two cancellation conditions for holding control based on the gradient of the road surface, using output increase index values and clutch connection states for uphill roads and solely clutch connection states for downhill roads to simplify the cancellation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If holding control is implemented for motorcycles without brake operation by rider, then the motorcycle can be held at stop without rider support, but the cancellation operation becomes complicated
Solution Approach 1:
The patent applies dynamics by making the cancellation condition adaptive rather than fixed. The control device dynamically switches between two cancellation conditions based on detected road gradient: on uphill roads, it requires both clutch operation and throttle operation; on downhill roads, it requires only clutch operation. This dynamic adjustment resolves the contradiction by optimizing the cancellation process for each road condition, improving ease of operation while maintaining holding control reliability.
Solution Approach 2:
The patent changes the parameters of the cancellation condition based on road gradient detection. When the road gradient exceeds a threshold (indicating uphill), the cancellation condition parameters are set to require both clutch and throttle operations. When the gradient is below the threshold (indicating downhill), the parameters are adjusted to require only clutch operation. This parameter change strategy resolves the technical contradiction by adapting the cancellation requirements to actual road conditions.
2Device complexity
If unified cancellation condition is used for all road gradients, then the control logic is simple, but engine stalling may occur on uphill roads
Solution Approach 1:
The control device dynamically adjusts the cancellation condition parameters based on detected road gradient. On uphill roads (gradient above threshold), it switches to a stricter cancellation condition requiring both clutch and throttle operations to prevent engine stalling. On downhill roads (gradient below threshold), it uses a simpler condition requiring only clutch operation. This dynamic adaptation resolves the contradiction between control logic simplicity and engine stalling prevention.
Solution Approach 2:
The patent changes the cancellation condition parameters according to road gradient detection results. When gradient exceeds the threshold, the parameters are modified to include both clutch operation detection and throttle operation detection as required conditions for cancellation. When gradient is below threshold, parameters are set to require only clutch operation. This parameter adaptation resolves the technical contradiction by optimizing both simplicity and reliability for different road conditions.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The present invention obtains a controller and a control method capable of improving operability of a motorcycle. In a controller 30 and the control method according to the present invention, an execution section of the controller 30 executes holding control for braking and holding a motorcycle 1 without relying on a brake operation by a rider of the motorcycle 1 at a stop of the motorcycle 1. The execution section switches a cancellation condition of the holding control between a first condition, under which the holding control is canceled on the basis of an output increase index value of a drive source (an engine 11) and connection state information of a clutch 12, and a second condition, under which the holding control is canceled not on the basis of the output increase index value but on the basis of the connection state information, according to a gradient of a road surface.