Integrated Engine Transmission Control Map Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current engine and transmission control methods independently set engine torque maps and shift pattern maps without considering the operating conditions of both systems, leading to inefficient fuel control and inconsistent vehicle acceleration, requiring extensive man-hours to set up and resulting in suboptimal fuel efficiency and driving performance.
Innovation Solution
An integrated control method that calculates required power based on vehicle state factors, determines target engine torque and RPM, and calculates a target shift ratio to synchronize engine and transmission operations, allowing for coordinated control of engine torque, RPM, and shift ratio to match driver intention and vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If engine torque map and shift pattern map are independently controlled, then each component can be controlled separately, but fuel efficiency and driving performance deteriorate due to lack of coordination
Solution Approach 1:
The patent merges the independent engine control and transmission control into a unified integrated control system. The control unit simultaneously manages both engine torque and transmission shift operations based on a single set of driving conditions and driver intent inputs, eliminating the energy inefficiencies caused by uncoordinated independent control.
Solution Approach 2:
The system dynamically adjusts engine torque and transmission shift operations in real-time based on current driving conditions and driver intent. The control unit continuously monitors vehicle state and modifies control parameters adaptively, allowing optimal fuel efficiency across varying operating conditions while maintaining coordinated control.
2Loss of time
If engine torque map and shift pattern map are independently set, then setup time is reduced for each component, but overall control consistency deteriorates leading to unintended acceleration behavior
Solution Approach 1:
The patent combines the separate engine torque map and transmission shift pattern map settings into a single integrated control framework. The control unit uses unified control logic that simultaneously determines both engine torque and shift timing based on the same driving conditions, ensuring consistent and coordinated acceleration behavior while maintaining efficient setup procedures.
3Ease of manufacture
If separate control maps are used for engine and transmission, then each map can be optimized independently, but overall vehicle performance deteriorates due to lack of integration
Solution Approach 1:
The patent merges the separate development processes for engine torque map and transmission shift pattern map into a unified integrated control development approach. The control unit is programmed with integrated control logic that simultaneously optimizes both engine and transmission operations based on driving conditions and driver intent, achieving superior overall vehicle performance while maintaining manageable development complexity.
Data Source
AI summary
An integrated control method is provided for an engine and a transmission and the method is capable of integrally controlling the engine and the transmission, based on a control correlation between the engine and the transmission. This method determines a target engine operating point reflecting a driving state of a vehicle and a driver's intention to accelerate, in an integrated control map having an engine control area and a transmission control area. The method calculates a target shift ratio based on the target engine operating point, thus being capable of significantly saving a man-hour required to set a map as compared to a conventional control method in which an engine torque map and a shift pattern map are individually set, and improving fuel efficiency.