MODULAR LINEAR GENERATORS

CAVIE® Modules

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Modules can be configured with liquid and gaseous fuel injectors.

FUEL INJECTION

The Continuously Adaptive Volume Intelligent Engine (CAVIE®) module is the heart of the MLG system. 

Intake, exhaust, and coolant manifolds are integrated into the cylinder block. Ports can be connected to other modules to form common manifolds for the full system.

INTEGRATED MANIFOLDS

The piston coolant, valvetrain hydraulics, and lubrication system fluids are transferred to the mover shafts through a special low-friction low-wear coupling.

SHAFT FLUID CONNECTIONS

SPARK PLUGS

Two spark plugs per cylinder improves ignition performance and offers redundancy of the ignition system.

Power output from the linear motor is connected to electronics to convert to the final desired output, configurable to the customer application.

LINEAR MOTOR POWER OUTPUT

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VALVE-IN-PISTON

GAS BEARING

PATENT-PENDING TECHNOLOGY

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Our unique valve-in-piston architecture is the first opposed free piston engine capable of both 2 and 4 stroke cycles. This design unlocks unprecedented hardware variability.

Compression, displacement, and valve lift profiles can be continuously varied during operation.

The piston assembly contains the engine poppet valve and valve actuator. The piston is rigidly coupled to the mover shaft.

MOVER SHAFT

The mover shafts transfer combustion pressure force to the linear electric generators. The mover shaft is the equivalent of a rotor in a traditional electric motor/generator. The shaft is hollow to allow passage of coolant to the piston crowns, hydraulic fluid to the valve actuators, and our unique graphite-based fluid to the piston ring lubrication system.

GAS SPRING

High-pressure nitrogen gas springs return the mover shaft after each stroke. The gas springs are adjustable to support variable displacement and compression features.

Air bearings precisely support the mover shafts with a coefficient of friction that is orders of magnitude lower than traditional engine plain bearings.

LINEAR STATOR

Each module has two liquid cooled stators for generating electricity from shaft motion and control inputs to the mover shafts to maintain precise piston motion.