Auxiliary Machine Load Compensation in Agricultural Engines
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Solution Overview
Problem
Agricultural working machines face challenges in compensating for short-term load fluctuations, leading to unfavorable engine operating points, increased fuel consumption, and pollutant emissions due to delayed driver reactions and limited energy storage in their electrical systems.
Innovation Solution
Incorporating a specially controlled auxiliary machine within the drive arrangement of the agricultural working machine, which adjusts the speed or torque of the internal combustion engine's output shaft to maintain a preset value, using the auxiliary machine as a generator to recharge energy storage when excess power is available, and supplying power to the engine during increased load requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the driver manually controls the engine speed based on noise evaluation, then the system can respond to load changes, but the reaction is delayed due to human response time and process complexity
Solution Approach 1:
The patent replaces manual driver control with an automated control device that directly monitors engine parameters and adjusts engine speed electronically. This substitution eliminates human reaction time delays and manual operation complexity, achieving immediate automated response to load fluctuations.
Solution Approach 2:
The control device continuously monitors engine speed and load conditions, comparing actual values with target values, and automatically adjusts engine parameters accordingly. This closed-loop feedback system eliminates the time delay inherent in manual noise-based evaluation and enables precise, immediate control responses.
2Quantity of substance
If the electrical system uses conventional lead-acid batteries, then the vehicle electrical system can supply power to components, but large-scale energy storage is not possible
Solution Approach 1:
The patent transitions from conventional lead-acid batteries to a hybrid energy storage system incorporating high-capacity accumulators (such as lithium-ion batteries). This parameter change in the energy storage medium enables large-scale energy storage while maintaining system manageability through modern battery management technologies.
Solution Approach 2:
The electrical system is designed to serve multiple functions: supplying power to vehicle components, storing excess energy from the generator, and providing buffer capacity for load fluctuations. This multi-functional design achieves large-scale energy storage without proportionally increasing system complexity.
3Productivity
If the engine speed is allowed to vary with load changes, then the power delivery adapts to working conditions, but the operating point shifts to unfavorable ranges increasing fuel consumption and emissions
Solution Approach 1:
The patent implements dynamic engine speed control that actively adjusts engine parameters in real-time to maintain optimal operating points. The control device continuously modifies engine speed and torque based on actual load conditions, enabling the engine to adapt power delivery dynamically while staying within efficient operating ranges, thus reducing fuel consumption and emissions.
Solution Approach 2:
The control device anticipates load changes and pre-adjusts engine parameters to maintain optimal operating points. By predicting upcoming load requirements and preparing the engine in advance, the system prevents operating point shifts to unfavorable ranges, thereby reducing fuel consumption and emissions before they occur.
4Reliability
If the auxiliary machine is used to compensate for load fluctuations, then immediate response is achieved, but the device complexity increases
Solution Approach 1:
The auxiliary machine is designed as a multi-functional component that can operate in different modes (motor and generator) to serve multiple purposes: compensating for load fluctuations, storing energy, and supporting the main engine. This universal design achieves reliable load fluctuation compensation without proportionally increasing overall system complexity.
Solution Approach 2:
The patent combines the auxiliary machine with the existing electrical system and energy storage components into an integrated hybrid drive arrangement. By merging these functions into a coordinated system managed by a single control device, the patent achieves reliable load compensation while minimizing the increase in overall device complexity through functional integration.
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 solution allows for immediate compensation of load fluctuations, maintaining the internal combustion engine at a favorable operating point, reducing fuel consumption and pollutant emissions, and optimizing power delivery to working units without driver delay.
Implementation Method 1
the control device (15) is configured in such a way that it operates the auxiliary machine (11) as an electric generator as soon as the speed on the output shaft (16) of the internal combustion engine (10) increases due to load changes
Implementation Method 2
Incorporating a specially controlled auxiliary machine within the drive arrangement of the agricultural working machine, which adjusts the speed or torque of the internal combustion engine's output shaft
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to an agricultural machine (1), in particular a harvesting machine, comprising a drive arrangement (9) having an internal combustion engine (10) and an auxiliary machine (11), and a first power consumer (5, 7). It is proposed that the auxiliary machine (11) be controlled such that a power output, in particular a preset output, from the internal combustion engine (10) is substantially maintained despite varying power requirements of the first power consumer (5, 7).