Free Piston Engine Position Control via Segmented Sensors

The cylinder is divided into multiple detection regions along the piston's travel path. Multiple sensors are positioned at different locations to detect when the piston passes each region, creating discrete position information segments that collectively provide complete position determination without requiring complex continuous measurement systems.

A magnetic field is introduced as an intermediary between the piston and the sensor system. The magnetic field interacts with the piston's motion to generate detectable signals that indicate piston position, enabling indirect measurement that avoids direct mechanical contact and reduces system complexity.

Instead of using a single complex encoder system, the measurement function is segmented into multiple simple binary sensors distributed along the cylinder. Each sensor provides a simple presence/absence signal for its specific detection region, and the controller synthesizes complete position information from these multiple simple signals.

The patent replaces expensive, complex encoder systems with multiple inexpensive binary sensors. Each sensor is a simple, low-cost component that provides sufficient information for its specific detection zone, and the collective data from multiple such sensors achieves the required overall measurement precision.

The controller receives signals from multiple sensors and uses feedback logic to determine piston position. The system cross-references signals from different sensors to validate position determination, and can compensate for or identify sensor errors through the pattern recognition of multiple independent measurements.

The detection function is segmented across multiple independent sensors rather than relying on a single magnetic sensor. This segmentation provides redundancy, as the failure or interference with one sensor does not prevent position determination, as other sensors can still provide valid position information.

The controller continuously monitors piston position and velocity through sensor feedback. Based on this real-time information, the controller determines the optimal ignition timing that maximizes energy utilization. The system can adjust ignition timing to occur when the piston has expended sufficient kinetic energy, preventing energy waste while maintaining continuous power generation.

The ignition timing is made dynamic rather than fixed. The controller adjusts the ignition timing based on real-time piston position and velocity conditions, allowing the system to optimize energy utilization for each specific operational state. This dynamic adjustment enables the engine to capture more kinetic energy before ignition in varying operating conditions.