Hybrid Vehicle Particle Filter Regeneration Control
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Solution Overview
Problem
In hybrid drive vehicles, the regeneration of the particle filter, which is essential for cleaning diesel soot particles from the exhaust gas, often conflicts with electric driving modes, leading to discomfort for drivers due to unexpected engine operation and noise, especially in urban areas where internal combustion engine operation is undesirable.
Innovation Solution
A method that uses a navigation device to determine the route and divide it into electric driving and regeneration areas, initiating particle filter regeneration only when entering a regeneration area, ensuring the filter is not regenerated in electric driving areas and charging the energy storage device by the internal combustion engine to allow electric-only operation in urban areas, with specific fill level limits determining when regeneration is necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal combustion engine is operated to regenerate the particle filter, then the particle filter is cleaned effectively, but the driver experiences discomfort due to unexpected engine operation and noise in urban areas
Solution Approach 1:
The navigation device determines the route and identifies electric driving areas in advance. The control unit plans regeneration activities beforehand, scheduling them to occur only in non-electric areas, thus preventing unexpected engine operation in urban zones and maintaining driver comfort while ensuring particle filter regeneration occurs
Solution Approach 2:
The control unit acts as an intermediary between the particle filter regeneration requirement and the driver's comfort expectation. It mediates by coordinating regeneration timing with navigation data, allowing regeneration to proceed in non-electric areas while blocking it in electric driving areas, thus balancing both requirements
2Productivity
If the particle filter is regenerated in electric driving areas, then regeneration efficiency is maintained, but the vehicle cannot operate solely electrically in urban areas
Solution Approach 1:
The system performs preliminary planning by determining the route and identifying electric driving areas before execution. It calculates the state of charge required to traverse electric areas and schedules regeneration activities in advance in non-electric areas, ensuring both regeneration efficiency and electric-only operation capability are maintained
Solution Approach 2:
The control unit dynamically adjusts the regeneration strategy based on real-time conditions including navigation data, state of charge, and particle filter status. This dynamic coordination allows the system to switch between regeneration and electric-only modes appropriately, maintaining both regeneration efficiency and adaptability to different driving areas
3Reliability
If the internal combustion engine is operated continuously to ensure particle filter regeneration, then filtration reliability is maintained, but energy consumption increases
Solution Approach 1:
Instead of continuous engine operation, the system implements periodic regeneration cycles coordinated with the route. The internal combustion engine operates intermittently only when needed for regeneration in non-electric areas, while the electric machine handles propulsion in electric driving areas. This periodic action reduces overall energy consumption while maintaining particle filter cleaning reliability
Solution Approach 2:
The control unit changes operational parameters dynamically, switching between electric machine and internal combustion engine based on location and particle filter status. By adjusting the state of charge threshold and coordinating regeneration timing with navigation data, the system optimizes energy consumption while ensuring particle filter reliability is maintained through targeted regeneration events
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances driver comfort by minimizing unexpected engine starts and noise, allowing the vehicle to operate solely electrically in urban areas and ensuring the particle filter is regenerated efficiently in suitable conditions, thus improving overall driving experience.
Implementation Method 1
the internal combustion engine is operated in such a way that it provides a drive torque that is greater than a specified torque required to drive the motor vehicle, and an energy storage device is charged by driving the electric machine by means of the internal combustion engine
Implementation Method 2
The particle filter is provided for cleaning exhaust gas which is generated by the internal combustion engine during its operation. Particles present in the exhaust gas, in particular soot particles, can be filtered out of the exhaust gas with the aid of the particle filter
Implementation Method 3
The particles are preferably burned in the process. For this purpose, for example, the internal combustion engine is operated in such a way that the temperature of the exhaust gas leads to a strong heating of the particle filter or the particles present therein, so that the particles burn
Data Source
AI summary
The invention relates to a method for operating a motor vehicle (1), wherein the motor vehicle (1) is provided with a hybrid drive device having an electric engine, an internal combustion engine and a particle filter associated with the internal combustion engine, wherein the internal combustion engine is operated periodically for regenerating the particle filter. In addition, in a first operating mode, the regeneration is only started when it is determined by a navigation device that a electric driving area (7) to be driven through lies ahead, in which area an operation of the internal combustion engine and/or the regeneration of the particle filter is not desired. The invention also relates to a motor vehicle (1).