Engine Air Supply Control for Transient Load Response
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Solution Overview
Problem
Internal combustion engines experience a significant engine speed drop and prolonged recovery time when facing transient load impacts, as existing control techniques fail to anticipate and prepare for impending mechanical loads effectively.
Innovation Solution
An internal combustion engine system equipped with an ECM that receives a signal from a load detector to increase air supply before the load is applied, using an electrical processing circuit to control the air supply system and initiate a power boost prior to the load increase, thereby reducing engine speed drop and recovery time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional control techniques are used to respond to transient load impacts, then the engine can maintain stable operation, but the engine experiences significant speed drop and prolonged recovery time
Solution Approach 1:
The control system performs preliminary action by detecting the load demand signal before the actual load is applied to the engine. The ECM receives the load demand signal from the load detector and initiates air supply increase in advance, boosting power before the transient load actually affects engine operation. This preliminary action eliminates the need to wait for engine speed drop to occur before responding.
2Ease of manufacture
If the engine displacement is reduced to lower costs, then the engine size and fuel consumption decrease, but the engine lacks sufficient power to handle transient load impacts
Solution Approach 1:
The system changes the parameter of air supply quantity dynamically in response to detected load demands. By increasing air supply before the load is applied, the engine can temporarily boost its power output beyond what would be available from a smaller engine operating at steady state, allowing smaller engine displacement to suffice.
3Productivity
If the air supply is increased immediately when load is applied, then the engine can respond to the load, but the response is delayed due to the time required for air flow to reach the new set point
Solution Approach 1:
The control system performs preliminary action by detecting the load demand signal from the load detector before the actual load is applied to the engine. The ECM receives this signal and initiates the air supply increase in advance, eliminating the time delay that would occur if air supply were only increased after load application. This allows the engine to be ready to handle the load immediately when it is applied.
Data Source
AI summary
An internal combustion engine is associated with a remote load indicator which provides an output signal, corresponding to an impending increase in mechanical load. The internal combustion engine includes an air supply system and an electrical processing circuit. The electrical processing circuit is coupled with the load indicator and receives the output signal. The electrical processing circuit controls the air supply system to initiate an increase in an air supply to the internal combustion engine prior to the increase in mechanical load.