Compact Exhaust Gas System Layout on Engine Block
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Complex exhaust gas systems in vehicles, particularly those with selective catalytic reaction (SCR) catalytic converters, face challenges such as temperature and pressure losses, installation space constraints, and logistical issues due to the placement of components away from the engine block, leading to increased costs and variant complexity.
Innovation Solution
An engine block arrangement where the exhaust gas turbocharger, oxidation catalytic converter, urea-water solution feed device, particle filter, and SCR catalytic converter are situated together on one side of the engine block, minimizing line lengths and avoiding underbody placement, with components housed in a shared container to reduce temperature and pressure losses and simplify sensor system mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the SCR catalytic converter is placed in the vehicle underbody area to provide a sufficiently long mixing section, then the mixing section length is sufficient, but temperature and pressure losses occur in the exhaust gas flow
Solution Approach 1:
The patent positions the SCR catalytic converter and mixing section in the engine compartment (vertical dimension near the engine) rather than extending horizontally through the vehicle underbody. This spatial reconfiguration allows the exhaust gas to travel a shorter path while still achieving sufficient mixing section length through optimized component positioning and internal flow path design within the SCR housing.
2Length of moving object
If the SCR catalytic converter is placed in the vehicle underbody area, then the mixing section length is sufficient, but the sensor system must be laboriously mounted and connected to the vehicle electronics system
Solution Approach 1:
The patent integrates the sensor system mounting locations directly on the SCR catalytic converter housing and associated components within the engine compartment. This consolidation allows sensors to be mounted in close proximity to each other and to the vehicle electronics, eliminating the need for lengthy wiring harnesses and complex routing through the vehicle underbody.
3Length of moving object
If the SCR catalytic converter is placed in the vehicle underbody area, then the mixing section length is sufficient, but a large number of exhaust gas system variants are necessary depending on vehicle type
Solution Approach 1:
The patent creates a universal exhaust gas treatment system design that can be applied across multiple vehicle types by positioning all components (exhaust gas turbocharger, oxidation catalytic converter, feed device, particle filter, and SCR catalytic converter) within the engine compartment. This standardized layout, with components arranged along one side of the engine block, provides a vehicle-type-independent solution that maintains sufficient mixing section length while reducing the number of required system variants.
4Area of stationary object
If the exhaust gas system components are placed away from the engine block, then installation space is available, but temperature and pressure losses occur due to long line lengths
Solution Approach 1:
The patent concentrates all exhaust gas system components in a localized area within the engine compartment, specifically along one side of the engine block. This creates a compact exhaust gas treatment train where the exhaust gas turbocharger, oxidation catalytic converter, feed device, particle filter, and SCR catalytic converter are positioned in close sequence, minimizing the total length of exhaust gas pathways and reducing thermal and pressure losses while still accommodating all necessary components.
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 configuration reduces temperature and pressure losses, simplifies sensor system integration, and eliminates variant dependency on vehicle type, resulting in a more efficient and cost-effective exhaust gas system with lower NOx emissions.
Implementation Method 1
an oxidation catalytic converter (7)
Implementation Method 2
an SCR catalytic converter (45)
Implementation Method 3
the urea reacts with the water to form ammonia and carbon dioxide
Implementation Method 4
The ammonia in turn reacts in the SCR catalytic converter with the nitrogen oxides of the exhaust gas flow, thus lowering the nitrogen oxides concentration
Data Source
AI summary
An engine block arrangement includes an engine block and an exhaust gas system. The exhaust gas system, viewed in the flow direction of an exhaust gas flow, includes an exhaust gas turbocharger, an oxidation catalytic converter, a feed device for a urea-water solution, a particle filter, and an SCR catalytic converter arranged one behind the other. The exhaust gas turbocharger, the oxidation catalytic converter, the feed device for the urea-water solution, the particle filter, and the SCR catalytic converter are situated together on the engine block along one side thereof, the side being oriented essentially perpendicularly with respect to an output side of the engine block.