Abstract

The present invention relates to a split-cycle external heat source engine comprising a pair of cylinders, a low-temperature cylinder (2) and a high-temperature cylinder (8), each comprising a reciprocating movable piston which defines, with each cylinder, a low-temperature working chamber (52) and high-temperature working chamber (58) for a working gas. A valve train mounted in the cylinder head (4) selectively connects, firstly, the low-temperature working chamber (52) to a working gas inlet (A) and a cold end (B) of a heat exchanger (6), and secondly the high-temperature working chamber (58) to a hot end (C) of the heat exchanger (6) and an exhaust (D). The valve train comprises at least one rotating slide valve (20, 30) comprising at least one internal passage associated with each working chamber, so as to guide the working gas between the working chambers (52, 58) and the resources.

IPC Classes  ?

• F02G 1/02 - Hot gas positive-displacement engine plants of open-cycle type
• F02G 5/02 - Profiting from waste heat of exhaust gases

Abstract

The present invention relates to a gate valve (10) for a motor (1) with an external heat source comprising a cylinder (2), a piston (3), a cylinder head (4), a working chamber (5) for a working gas, a valve train comprising the gate valve bringing the working chamber selectively into communication with different resources. The gate valve (10) comprises two coaxial portions: - a portion (11) for guiding the working gas, comprising internal passages opening radially through at least one outlet that communicates selectively with the working chamber (5) via at least one opening (41) provided in the cylinder head (4), and - a portion (16) for distributing the working gas, which is movable and arranged on the periphery of the guide portion (11), comprising at least one window (17) that brings the working chamber (5) selectively into communication with at least one of the internal passages, such that the working gas flows selectively between the working chamber (5) and the different resources. The present invention also relates to a motor with an external heat source comprising the gate valve.

IPC Classes  ?

• F01L 7/02 - Rotary or oscillatory slide-valve gear or valve arrangements with cylindrical, sleeve, or part-annularly-shaped valves

Abstract

The present invention concerns an external heat source engine comprising: - at least one cylinder (2), - a piston (3) that is movable back and forth in the cylinder, - a cylinder head (4) defining a working chamber (5) with the piston and the cylinder, - a heat exchanger (6) for exchanging heat between a working gas and a heat-transfer fluid, - a distribution comprising two rotary slide valves (20, 30) mounted so as to be able to rotate in the cylinder head and bringing the working chamber selectively into communication with the following resources: o a working gas inlet (A), o a cold end (B) of the exchanger, o a hot end (C) of the exchanger, o an exhaust (D). The slide valves (20, 30) comprise internal passages that open through the side wall of same through at least one opening that communicates selectively with the working chamber (5) via at least one opening formed in the cylinder head (4).

IPC Classes  ?

• F02G 1/02 - Hot gas positive-displacement engine plants of open-cycle type
• F01L 7/02 - Rotary or oscillatory slide-valve gear or valve arrangements with cylindrical, sleeve, or part-annularly-shaped valves
• F01L 7/16 - Sealing or packing arrangements specially therefor
• F01L 7/18 - Component parts, details, or accessories, not provided for in preceding subgroups of this group

Abstract

The invention relates to a heat engine comprising means for: compressing a cooled working gas, heating the compressed working gas using an external heat source, expanding the heated compressed working gas, cooling the working gas using a heat exchanger with a cold source, and, subsequently, returning the cooled working gas into the compression means.

IPC Classes  ?

• F02G 1/04 - Hot gas positive-displacement engine plants of closed-cycle type
• F02G 1/00 - Hot gas positive-displacement engine plants
• F02G 5/02 - Profiting from waste heat of exhaust gases