US 10,557,409 B2Granted

Heat engine comprising a system for varying the compression ratio

AssigneeGomecsys B.V.

InventorsMatthieu Pogam, Julien Berger, Lambertus Hendrik De Gooijer, Willem-Constant Wagenvoort, Sander Wagenaar

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Abstract

A heat engine includes a system for varying the compression ratio of the engine. The compression ratio varying system comprises: at least one eccentric part rotatably mounted on a crank pin. The eccentric part has an eccentric outer face that co-operates with one end of a rod, as well as at least one ring gear. A device for controlling the angular position of the eccentric part, includes an actuating pinion mounted on an actuating shaft. The control device also comprises at least one stepped intermediate pinion having at least first and second steps each formed by a pinion, the pinion of the first step meshing with the actuating pinion and the pinion of the second step meshing with the gear of the eccentric part.

Claims17

Dependent claims

A heat engine including a system configured to vary a compression ratio of said engine, said system comprising:

a crankshaft having a crankshaft crankpin supported on a crank arm,
at least an eccentric part which is rotatably mounted on the crankshaft crankpin, wherein said eccentric part comprises an external face including an eccentric shape which is intended to cooperate with an end of a connecting rod, as well as at least a gear,
a control device configured to control a rotational position of said eccentric part which comprises an actuating pinion which is mounted on an actuating shaft that passes through the crank arm, wherein said control device further comprises at least a stepped intermediate pinion, which comprises at least a first and a second stage that are each formed by a pinion, wherein the pinion of said first stage meshes with said actuating pinion and the pinion of said second stage meshes with said gear of the eccentric part.

Dependencies are inferred from the claim text.

Facts

Application: 15/769,438Filed 3 Oct 2016
Priority: FR 15 6008722 Oct 2015
Published: US 2018/0306107 A125 Oct 2018
Granted: 11 Feb 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F02B 75/048
Engines with variable distances between pistons at top dead-centre positions and cylinder heads: by means of a variable crank stroke length
F02D 15/02
Varying compression ratio: by alteration or displacement of piston stroke
F16C 3/28
Cranks; Eccentrics: adjustable cranks or eccentrics
F16H 21/30
With one connecting-rod and one guided slide to each crank or eccentric: with members having rolling contact