Injection device for compressed air engine, compressed air engine equipped with such a device and hybrid drive chain including such an engine.

Abstract

The invention relates to a mechanical compressed air injection device for a piston-type compressed air engine with optimized fuel consumption and power. The device comprises a compressed air inlet valve (S) including a first part (20) and a second part (30) mounted to slide relative to each other in the direction of piston movement, the movement of the first part (20) being mechanically controlled by the piston. The injection device also includes a means (40) for temporarily holding the second part (30) relative to the first part (20) so as to impose an asynchronous movement between the second part (30) of the valve and the piston (1). Figure for the abstract: Fig. 2

Claims

valve (32) has a truncated cone shape.

7. Compressed air engine cylinder head equipped with a device according to one of claims 1 to 6.

8.

9. Compressed air engine comprising a cylinder head according to claim 7. Hybrid powertrain intended to equip a vehicle comprising a high pressure compressed air tank connected to a compressed air piston engine according to claim 8, engaged with an electric generator for generating electricity when driven by the compressed air piston engine, the generator being connected to at least one electric motor connected to a transmission engaged with a moving member of the vehicle.

10. Powertrain according to claim 9, wherein the generator and said at least one electric motor are connected via a relay electrical reserve with a capacity of between 0.2 and 2.2 Watt-hours per kilo of vehicle to be equipped (Wh / kg of vehicle).

11. Powertrain according to claim 9 or 10, further comprising an accelerator control movable between a stop position and a maximum acceleration position and connected to an electronic control circuit comprising a controller programmed to power the electric motor from the relay electrical reserve as a function of a signal captured by at least one sensor fitted to the vehicle.

12. A generator set comprising a high pressure compressed air reservoir connected to a compressed air piston engine according to claim 8, engaged with an electric generator for generating electricity when driven by the compressed air piston engine. READ F10

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