Injector Activation Response for Engine Coolant Rail
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Solution Overview
Problem
Existing coolant injection systems for internal combustion engines face challenges in efficiently activating and controlling injectors to manage coolant flow, particularly in varying vehicle inclinations, which can affect the geometric structure and pressure dynamics within the system, leading to suboptimal performance and potential damage from coolant residue.
Innovation Solution
A control device that determines an activation response for the injectors based on an inclination variable, selecting from predetermined sequences and times to optimize coolant flow, taking into account the geometric structure of the rail and pressure dynamics, ensuring efficient filling and emptying while preventing damage to the engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the injectors are activated in a fixed sequence regardless of inclination, then the control logic is simple, but the coolant flow efficiency deteriorates under varying vehicle inclinations
Solution Approach 1:
The patent applies dynamics by making the injector activation sequence adaptive rather than fixed. The control device dynamically adjusts the activation sequence based on the detected inclination angle, allowing the system to optimize coolant flow efficiency for each specific operating condition while maintaining manageable control complexity through automated adjustment.
Solution Approach 2:
The patent changes the parameter of injector activation timing based on inclination angle. By detecting the inclination and selecting from predetermined activation sequences corresponding to different inclination ranges, the system optimizes coolant flow characteristics for each operating condition without requiring complex real-time calculations.
2Productivity
If the injector activation sequence is optimized for each inclination angle, then coolant flow efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing multiple predetermined injector activation sequences for different inclination angles before operation. During operation, the control device only needs to detect the current inclination and select the appropriate pre-prepared sequence, avoiding the need for complex real-time optimization calculations and reducing control system complexity.
Solution Approach 2:
The patent segments the continuous range of inclination angles into discrete ranges, with each range having its own predetermined activation sequence. This segmentation allows the system to handle complex multi-angle optimization by dividing it into manageable discrete cases, reducing the overall control complexity while maintaining efficiency across the full operating range.
3Power
If coolant is injected during high power operation, then engine power is increased, but exhaust gas temperature may exceed maximum permissible limits
Solution Approach 1:
The patent utilizes phase transitions by injecting coolant that evaporates during combustion, absorbing heat and reducing exhaust gas temperature. The vaporizing coolant transforms from liquid to gas phase, absorbing significant heat in the process, thereby cooling the combustion gases and preventing excessive exhaust temperatures while maintaining engine power.
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
The control device ensures high-quality activation responses that enhance the efficiency and safety of coolant injection, preventing excessive exhaust gas temperatures and ensuring complete coolant removal, thereby improving engine power and longevity.
Implementation Method 1
determine an activation response for the injectors as a function of the inclination variable... taking into account the geometric structure of the rail and pressure dynamics
Implementation Method 2
cooling the internal combustion engine by introducing a coolant... The vaporizing fluid has a cooling effect on the mixture during and after the combustion
Implementation Method 3
The injectors can be supplied with coolant by means of a common rail, which serves as a pressure accumulator
Data Source
AI summary
A control device is provided for a cooling liquid injection system for an internal combustion engine of a motor vehicle. The cooling liquid injection system includes at least two activatable injectors for introducing a cooling liquid into the internal combustion engine, which injectors can be controlled by the control device. The injectors can be supplied with cooling liquid by way of a common rail, and the control device is designed to receive an inclination variable, which characterizes an inclination of the rail, to determine an activation response for the injectors in dependence on the inclination variable, and to activate the injectors using the determined activation response in order to empty or fill the rail.