US 8,783,222 B2Granted

Apparatus and method of control of balance shafts in an engine

AssigneeRENAULT s.a.s.

InventorsAlexandre Anton, Jean-Yves Der-Matheossian

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Abstract

An internal combustion engine including: an even number of inline cylinders, each accommodating a piston; a crankshaft rotatably mounted about an axis; first and second balance shafts rotatably mounted about balancing axes parallel to and separate from the engine axis; and first and second mechanisms for rotating the first and second balance shafts at rotating speeds that are dependent on a rotating speed of the crankshaft. The balancing axes of the first and second balance shafts coincide, and the second rotating mechanism adjusts a phase difference between angular positions of the first and second balance shafts around the balancing axis.

Claims17

Dependent claims

An internal combustion engine comprising:

an even number of in-line cylinders;
a crankshaft mounted to rotate about an engine axis;
first and second balance shafts mounted to rotate about balance axes that are parallel and distinct from the engine axis;
first rotational-drive means for turning the first balance shaft in a direction of rotation that is opposite the direction of rotation of the crankshaft and at a rotational speed that is a function of a rotational speed of the crankshaft;
second rotational-drive means for turning the second balance shaft in a direction of rotation that is opposite the direction of rotation of the first balance shaft and at a rotational speed that is a function of the rotational speed of the crankshaft;
and
phase adjustment means for adjusting a phase angle between the first and second balance shafts.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/981,496Filed 19 Jan 2012
Priority: FR 11 0046115 Feb 2011
Published: US 2013/0312683 A128 Nov 2013
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16F 15/264
Of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system , i.e. masses connected through a kinematic…:…
F01L 1/344
Characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the…:…
F16C 3/20
Crankshafts, eccentric-shafts; Cranks, eccentrics: shape of crankshafts or eccentric-shafts having regard to balancing
F16F 15/265
Rotating balancer shafts: arrangement of two or more balancer shafts

Family

US 2013/0312683 A1Pre-grant publication · published 28 Nov 2013
US 8,783,222 B2This patent

From the US filing history. Foreign family members aren’t listed.

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