| 摘要 |
An internal combustion free-piston pump-engine provides pressurized fluid for a hydrostatic powertrain. The free-piston is reciprocably mounted in a piston bore and transfer combustion pressure directly into pressurized hydraulic fluid. Fast, computer controlled hydraulic two-way valves initiate the stepwise pressurization of the smaller face, the larger face, or both faces of the hydraulic end of the free-piston, controlling the piston movement and especially its top-end and bottom end positions. The control concept can be applied to a two-stroke, or four-stroke compression or spark ignition engine. A pressure wave charger, transfers the energy of the exhaust pressure wave into an air intake pressure wave. A cylindrical piston is reciprocally mounted in a piston bore of a housing. The exhaust pressure wave moves the piston from the top-end position to the bottom-end position, against the pressure of the intake air and the force of a return spring. The spring returns the piston back to the top-end position, with the support of collapsing exhaust pressure, after the charger piston releases the exhaust before reaching the bottom-end position. A fuel injector apparatus includes a fuel pump, a fuel accumulator/common rail, an injector valve and an injector ring assembly with injection nozzles at the inner circumference. The oscillating fuel pump piston converts hydraulic pressure directly into pressurized fuel. The nozzles are manufactured into the axial face of a first ring, covered and sealed by means of a second ring of the assembly.
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