Dynamic Engine Speed Acceleration Control via Vehicle Load Mapping
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Solution Overview
Problem
Existing methods for controlling diesel engine operating behavior in motor vehicles require individual specification for each vehicle's drive train and area of use, limiting their universal applicability and efficiency.
Innovation Solution
A map programmed into the vehicle management computer controls engine speed acceleration relative to engine speed and vehicle speed, allowing for uniform control across multiple vehicles by adjusting acceleration based on loading conditions and desired dynamics, thereby optimizing fuel consumption and reducing noise and emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual specification of control parameters is used for each vehicle, then the control accuracy for specific drive train configurations is improved, but the complexity of implementation and lack of universality increases
Solution Approach 1:
The patent applies universality by creating a single control method that works across multiple vehicle configurations. The control parameters are designed to be universally applicable to different drive train configurations, vehicle weights, and usage conditions without requiring individual customization for each vehicle type.
Solution Approach 2:
The patent uses parameter changes by dynamically adjusting control parameters based on operating conditions such as vehicle speed, acceleration demands, and loading conditions. This allows the system to adapt to different scenarios while maintaining a universal control framework, resolving the contradiction between accuracy and complexity.
2Productivity
If maximum speed acceleration is maintained in unloaded state, then the productivity and response time are improved, but the fuel consumption and emissions increase
Solution Approach 1:
The patent applies dynamics by making the speed acceleration limits dynamic rather than static. The control system continuously adjusts the maximum allowable speed acceleration based on real-time operating conditions including vehicle loading, speed, and acceleration demands. This allows high acceleration when needed (improving productivity) while reducing acceleration when not needed (reducing fuel consumption), thus resolving the contradiction.
Solution Approach 2:
The control method uses feedback from sensors monitoring vehicle speed, acceleration, and loading conditions to continuously adjust the speed acceleration limits. This closed-loop control ensures that the system maintains optimal acceleration performance while minimizing fuel consumption by adapting to actual operating conditions rather than operating at fixed maximum values.
3Productivity
If high engine speed acceleration is allowed, then the productivity is improved, but the noise emissions and passenger comfort deteriorate
Solution Approach 1:
The patent dynamically adjusts the engine speed acceleration limits based on operating conditions such as vehicle speed and loading. By making the acceleration limits adaptive rather than fixed at maximum values, the system can maintain high productivity when conditions warrant it while reducing noise emissions during normal operating conditions, thus resolving the contradiction between productivity and harmful factors.
Data Source
Figure 1
AI summary
The method involves a vehicle control computer regulating electronic fuel injection depending on the engine revolution rate and regulating the acceleration of the engine revolution rate with a characteristic (1) programmed into the computer that relates the desired value of revolution rate acceleration (3), engine revolution rate (2) and vehicle speed (4) to each other.