Selective Ignition Delay for Engine Power Control
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Solution Overview
Problem
Current power control methods for internal combustion engines, such as cutting the ignition spark, result in energy waste, inefficient turbocharger pressurization, mechanical stress, and unbalanced engine operation due to inadequate power distribution and temperature management across cylinders.
Innovation Solution
Implementing a selective ignition delay method that adjusts the ignition point after maximum compression, allowing real-time, individualized power reduction for each cylinder to ensure continuous energy utilization and efficient power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the ignition spark is cut off to control power, then power reduction is achieved, but energy is wasted and combustion chamber temperature drops
Solution Approach 1:
The invention changes the timing parameter of ignition spark injection, delaying it from the conventional pre-compression timing to after maximum compression is reached. This parameter change allows power reduction while maintaining continuous combustion and energy utilization, resolving the contradiction between power control and energy waste
Solution Approach 2:
The system dynamically adjusts ignition timing on a per-cylinder, per-cycle basis, allowing real-time power modulation without complete ignition cut-off. This dynamic control enables progressive power reduction while maintaining continuous combustion processes, eliminating energy waste associated with complete spark cut-off
2Power
If the ignition spark is cut off to control power, then power reduction is achieved, but turbocharger pressurization efficiency decreases
Solution Approach 1:
By delaying ignition timing to after maximum compression, the invention maintains continuous combustion and exhaust gas flow, which sustains turbocharger pressurization efficiency while achieving power control through reduced expansion work rather than complete combustion cessation
3Power
If the ignition spark is cut off to control power, then power reduction is achieved, but mechanical stress and vibration increase
Solution Approach 1:
The system provides dynamic, progressive power reduction across multiple cylinders rather than abrupt complete cut-off, maintaining balanced combustion forces and reducing mechanical stress and vibration while achieving power control
Solution Approach 2:
By maintaining continuous combustion in all cylinders through delayed ignition rather than complete spark cut-off, the invention ensures continuous useful action that balances engine operation and reduces vibration while achieving power reduction
4Power
If the ignition spark is cut off to control power, then power reduction is achieved, but temperature conditions become inadequate for next combustion
Solution Approach 1:
The invention maintains continuous combustion in all cylinders by delaying rather than eliminating ignition, ensuring continuous heat generation that maintains adequate combustion chamber and spark plug temperatures for reliable next combustion cycles
Solution Approach 2:
By maintaining continuous low-level combustion through delayed ignition, the system performs preliminary heating action that prepares the combustion chamber and spark plugs for subsequent full-power combustion cycles, preventing temperature inadequacy
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 prevents energy waste, maintains optimal cylinder temperatures, enhances turbocharger pressurization, reduces mechanical stress, and achieves stable engine operation with precise power control from 0 to 100% per cylinder, improving overall engine efficiency and performance.
Implementation Method 1
the power control of combustion engines is performed by cutting the ignition spark. This cut-off causes no combustion to happen in the engine cylinder
Implementation Method 2
the fuel and air are discarded without being used. In addition, the unused fuel cools the combustion chamber as it is at a lower temperature than the combustion chamber under normal operation
Data Source
AI summary
A power control method/process of an internal combustion engine employing a selective ignition delay, in which the process chooses, in real time, just before the ignition, whether the next cylinder should have its power reduced or not, in such a way that this choice at high speed, individualized by cylinder, guarantees a higher resolution in the power control, where the process has the following steps: vaporized air and fuel enters the combustion chamber of the cylinder; a piston compresses the air and fuel increasing their pressure; the ignition spark does not occur, keeping the gases in the combustion chamber unchanged; the inertia of the engine causes the piston to move, where the ignition spark occurs shortly thereafter, with reduced work generation; air and fuel still expanding are expelled through the exhaust valve.