Engine Torque Deviation Detection via Speed Monitoring
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Solution Overview
Problem
Existing engine systems face challenges in accurately detecting torque deviations, which can lead to non-optimum gearchanges, increased fuel consumption, and potential engine stoppages due to unexpected torque variations caused by fuel type changes or fuel supply stoppages.
Innovation Solution
A method and system that measure actual torque values and compare them to previously determined values during normal operation to detect deviations, allowing for precise control of engine torque and detection of fuel supply issues, thereby preventing engine stoppages and optimizing fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If torque monitoring is not implemented, then the system operates with expected torque values, but actual torque deviations go undetected leading to non-optimum gearchanges and increased fuel consumption
Solution Approach 1:
The patent uses engine speed as an intermediary parameter to indirectly measure torque. Instead of directly measuring torque, the system monitors engine speed variations which correlate with torque deviations. This intermediary approach enables torque detection without requiring complex direct torque measurement sensors, thus improving measurement precision while limiting device complexity increase.
Solution Approach 2:
The patent replaces mechanical torque measurement systems with an electronic monitoring system that uses existing engine speed sensors and computational algorithms. By substituting mechanical measurement with electronic detection and signal processing, the system achieves accurate torque monitoring without adding complex mechanical components.
2Productivity
If torque deviations are detected and controlled, then gearchange optimization and fuel efficiency improve, but the control system complexity increases
Solution Approach 1:
The patent implements a feedback control system where detected torque deviations are used to adjust control parameters in real-time. The system continuously monitors engine speed, compares actual torque with expected torque, and feeds back correction signals to optimize gearchange timing and fuel injection. This feedback mechanism enables productivity improvement through automated optimization while managing control complexity through systematic control loops.
Solution Approach 2:
The patent makes the monitoring system multi-functional by using the same torque detection infrastructure for multiple purposes: gearchange optimization, fuel injection control, and fault detection. This universal approach allows the system to achieve multiple productivity benefits simultaneously without proportionally increasing control system complexity, as one monitoring framework serves multiple control functions.
3Loss of energy
If real-time torque monitoring is implemented, then fuel consumption is reduced through optimized control, but energy usage for monitoring increases
Solution Approach 1:
The patent implements a self-service monitoring approach where the system uses existing engine operational parameters (engine speed from crankshaft position sensors) to derive torque information without requiring additional dedicated measurement devices. The monitoring system serves itself by utilizing already-available data from normal engine operation, enabling fuel consumption optimization through torque-aware control while minimizing the energy overhead of the monitoring system itself.
Data Source
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AI summary
A method and a system for detection of torque deviations of an engine (101 ) in a vehicle (100) is presented. According to the method, a measurement (201 ) is made of actual measured values Dact related to a behaviour of at least one parameter which is related to an actual torque Meng_act delivered by the engine (101 ). This actual torque Meng_act is delivered here by the engine (101 ) in consequence of a torque Meng_req demanded from the engine (101 ). A comparison (202) is then made of the actual measured values Dact which are related to the behaviour of the at least one parameter with previously determined measured values Dref of correspondingly at least one respective parameter related to the actual torque Meng_act. The previously determined measured values Dref will here have been determined during normal operation of the vehicle (100). A detection is then made of whether the actual measured actual torque Meng_act deviates from the demanded torque Mengj-eq. The detection is based here on the comparison of the actual measured values Dact with the previously determined measured values Dref.