Commercial Vehicle Coasting Control Using Braking State Feedback
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Solution Overview
Problem
Conventional techniques fail to set an inertial driving mode or a power driving mode for commercial vehicles based on the state of their braking means, leading to inefficiencies and safety concerns.
Innovation Solution
A method and system that determine the driving state and slope state of a commercial vehicle, setting it to an inertial driving mode when certain conditions are met and switching to a power driving mode when sufficient braking force is not secured, using a state determination unit and driving mode setting unit to control the vehicle's engine, power transmission, and braking means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If inertial driving mode is set for commercial vehicles based on conventional techniques (road slope only), then fuel efficiency is improved, but driving safety deteriorates due to insufficient consideration of braking means state
Solution Approach 1:
The system changes the control parameters from only road slope to a comprehensive set including driving state, road slope, and braking means state. This allows the inertial driving mode to be activated only when braking force is sufficient, thus improving both fuel efficiency and driving safety by adapting the control parameters to actual vehicle conditions
Solution Approach 2:
The system introduces feedback from the braking means state sensor to the driving mode control. The control unit continuously monitors the braking force state and adjusts the driving mode accordingly, creating a closed-loop control system that ensures safety while optimizing fuel efficiency through real-time condition assessment
2Use of energy by moving object
If inertial driving mode is activated without checking braking means state, then fuel efficiency is improved, but braking reliability deteriorates when braking force is insufficient
Solution Approach 1:
The system performs preliminary assessment of the braking means state before activating inertial driving mode. By checking whether sufficient braking force is available in advance, the system prevents activation of inertial mode under unsafe conditions, thus maintaining both fuel efficiency and braking reliability
Solution Approach 2:
The control system changes the activation parameters for inertial driving mode to include braking means state in addition to driving state and road slope. This parameter expansion ensures that inertial mode is only activated when all conditions are favorable, including sufficient braking capability
Data Source
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AI summary
According to one aspect of the present invention, there is provided a method for controlling an inertial driving mode of a commercial vehicle, the method comprising the steps of: determining at least one of a driving state of a commercial vehicle and a slope state of a road on which the commercial vehicle is driving; and setting a driving mode of the commercial vehicle to an inertial driving mode in response to the driving state of the commercial vehicle satisfying a first condition or the slope state satisfying a second condition, wherein the driving mode of the commercial vehicle is switched from the inertial driving mode to a power driving mode in response to a state of a braking means of the commercial vehicle satisfying a third condition.