Variable Valve Gear Control for Fuel Efficiency
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Solution Overview
Problem
Current driver assistance systems for commercial vehicles do not fully exploit potential for fuel saving and efficient operation of exhaust gas aftertreatment systems, particularly in varying road conditions and traffic situations.
Innovation Solution
An operating method for a driver assistance system that determines operationally relevant road properties and adjusts the variable valve gear of the internal combustion engine to optimize fuel efficiency and exhaust gas treatment, including adaptive valve timing and gear changes, informed by satellite location and navigation data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If driver assistance systems use conventional cruise control with basic road profile data, then the system is simple to operate, but fuel saving potential and exhaust gas aftertreatment efficiency are not fully exploited
Solution Approach 1:
The system determines operationally relevant road properties in advance before the vehicle reaches them, allowing proactive adjustment of engine parameters and valve timing to optimize fuel consumption and exhaust gas treatment before critical conditions arise
Solution Approach 2:
The system dynamically adjusts engine operation and variable valve gear settings in real-time based on determined road properties and traffic situations, transitioning from static cruise control to adaptive engine management that responds to changing operational conditions
2Use of energy by moving object
If the system determines and implements multiple operationally relevant road properties and adjusts variable valve gear, then fuel saving potential is exploited, but the device complexity increases
Solution Approach 1:
The system changes engine operating parameters including valve timing, duration and lift characteristics through variable valve gear adjustment based on determined road properties, optimizing combustion efficiency and exhaust gas flow for different operational conditions
Solution Approach 2:
The variable valve gear system serves multiple functions simultaneously: optimizing fuel consumption, improving exhaust gas aftertreatment efficiency, and adapting to different road properties and traffic situations through a single integrated control mechanism
Data Source
AI summary
An operating method for a driver assistance system, in particular a cruise control system of a motor vehicle. The operating method comprises determining at least one operationally relevant road property of a road on an impending route of the motor vehicle, wherein the operationally relevant road property affects operation of an internal combustion engine of the motor vehicle. The operating method comprises determining a driving recommendation in accordance with the operationally relevant road property on the impending route of the motor vehicle. The operating method comprises setting the variable valve gear in accordance with the driving recommendation determined.