Linear extended-range generator driven by a pre-charged, exhaust-exchange free-piston engine

Abstract

The linear range extender generator driven by the pre-pressurized and exhaust free piston engine involves the engine and the generator. Two sets of cylinders are connected to the generator body. The pistons in the cylinder form a set of free pistons through the connecting rod. Compression system, the piston reciprocates once, the exhaust valve and intake valve of each cylinder are opened and closed once, the exhaust gas is flushed with new air and the intake is completed, and then the compression work is performed once each, which is a combination of in-cylinder exhaust gas recirculation and similar Miller cycle. Through the piezoelectric knock sensor and controller, the highest compression ratio that the engine can achieve suitable for the current situation is automatically selected. The partial lubrication of the piston is the internal circulation lubrication with the inertial density difference driving the self-circulating pump as the core, and the generator is composed of two sets of phases. Cogged cylindrical stator cylindrical rare earth permanent magnet reciprocating linear generator with stator coil windings with a difference of 90 degrees, the electric energy output of the generator is a power-controlled regulation output circuit, and the generator doubles as a starter motor.

Description

technical field [0001] The invention relates to an internal combustion engine and a range-extending generator driven by the internal combustion engine, which is a linear range-extending generator driven by a pre-pressurized and exhaust-exchange free-piston engine. Background technique [0002] Electric vehicles are the direction of automobile development due to their energy-saving and environmental protection characteristics. At present, electric vehicles have problems such as insufficient driving range on a single charge, or the battery itself is too heavy, charging time is long, and charging piles are not popular. Extended-range electric vehicles not only have the characteristics of high efficiency and low emissions of pure electric vehicles, but also can extend the driving range of pure electric vehicles. The existing four-stroke range extender has serious shortages in power volume, liter power, and power proportion. The existing two-stroke reciprocating free-piston engin...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the serious shortage of power volume, liter power, and power proportion of existing four-stroke range extenders, and the existing two-stroke reciprocating free-piston engine range extenders have large pollution and waste of fuel. A linear range-extending generator driven by a gas free piston engine, which has high power capacity, high power lift, high power specific gravity, variable compression ratio and high efficiency, good emission, and relatively simple structure

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