Vehicle Exhaust Purifier Cleaning Using Generator Load and Grid Box
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Solution Overview
Problem
Existing methods for cleaning exhaust gas purifying devices in diesel engines increase weight and costs due to the need for additional batteries or resistors, and can cause thermal damage.
Innovation Solution
A transportation vehicle with a diesel engine, generator, traveling motor, and grid box, controlled by a controller to manage electric power generation and consumption, allowing the generator to increase exhaust gas temperature for cleaning without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a generator connected to an engine is used to increase engine load and burn deposits by generating electric power for cleaning the exhaust gas purifying device, then the cleaning function is achieved, but an extra battery for storing the electric power has to be mounted, leading to increase in weight and costs
Solution Approach 1:
The grid box, originally designed solely for consuming regenerative electric power from the traveling motor, is enhanced to perform dual functions: it continues to consume regenerative power while also consuming additional electric power from the generator during exhaust gas purifying device cleaning operations. This eliminates the need for separate power storage components.
Solution Approach 2:
The patent combines the power consumption functions for both normal operation (consuming regenerative power) and cleaning operation (consuming generator power) into a single grid box component. This merging of functions avoids the need for separate batteries or power management systems that would increase weight and cost.
2Reliability
If a resistor is installed inside a muffler to consume the electric power generated by a generator for cleaning, then the cleaning function is achieved, but the weight and costs of the muffler increase, and thermal damages to the resistor are caused by the exhaust gas with high-temperature
Solution Approach 1:
The grid box serves as an intermediary power consumption device that converts electric power to heat in a controlled manner, separate from the high-temperature exhaust gas environment. By using the grid box instead of installing a resistor directly in the exhaust path, the system avoids thermal damage while still achieving the necessary heat generation for deposit combustion.
Solution Approach 2:
The power consumption function is extracted from the exhaust system (muffler) and placed in a separate component (grid box) that is not exposed to high-temperature exhaust gases. This separation eliminates the thermal damage problem while maintaining the cleaning capability.
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
Enables effective cleaning of exhaust gas purifying devices while minimizing weight and cost increases, using existing grid box components for power consumption.
Implementation Method 1
a generator that generates an electric power using a driving force of the diesel engine
Implementation Method 2
a grid box that converts the electric power generated by at least one of the generator or the traveling motor into heat to consume the electric power
Implementation Method 3
a traveling motor that generates a driving force for rotating a tire using the electric power generated by the generator
Data Source
AI summary
A transportation vehicle capable of realizing a cleaning function of an exhaust gas purifying device while suppressing increase in the weight and costs. The transportation vehicle comprises: a diesel engine; a generator; a traveling motor; a grid box that converts the electric power generated by at least one of the generator or the traveling motor into heat to consume the electric power; an exhaust gas purifying device, and a controller configured to, in a case of causing the generator to generate load necessary to increase a temperature of the exhaust gas to a cleaning temperature, if determining that additional electric power additionally generated by the generator can be consumed by the grid box, cause the generator to additionally generate the additional electric power to remove the harmful substances deposited on the exhaust gas purifying device, and causes the grid box to additionally consume the additional electric power.