Reciprocating-piston machine

Patent metadata

Field	Value
Publication number	US-11466596-B2
Application number	US-201716091214-A
Country	US
Kind code	B2
Filing date	Mar 30, 2017
Priority date	Apr 5, 2016
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

The invention relates to a reciprocating-piston machine, comprising a valve actuation device for at least one gas exchange valve, at least one valve stroke transmission device, which has at least one valve stroke transmission element, which is arranged between the gas exchange valve and the camshaft and which is mounted for movement between a first Position associated with a closed Position of the gas exchange valve and a second Position associated with an open position of the gas exchange valve, at least one halting device having a halting element mounted for movement between an actuation position and a release position in a machine housing or a housing-fixed component parallel to a guiding surface of the first valve stroke transmission element that the halting element at least shows the displacement motion of the first valve stroke transmission element and releases said displacement motion in the release position.

First claim

The invention claimed is:

1. Reciprocating-piston machine comprising:
a valve actuation device for at least one gas exchange valve;
at least one valve stroke transmission device including at least one first valve stroke transmission element, which is arranged between a valve lever and a push rod, and is configured and arranged for movement between a first position associated with a closed position of the gas exchange valve and a second position associated with an open position of the gas exchange valve; and
at least one retaining device including a retaining element, the retaining element is configured and arranged for movement between an actuation position and a release position in a cylinder head or a housing-fixed component parallel to a guide surface of the at least one first valve stroke transmission element, wherein in an actuation position the retaining element at least retards a displacement movement of the at least one first valve stroke transmission element in a direction of the second position and releases the at least one first valve stroke transmission element in the release position, wherein the retaining element includes an attack surface configured and arranged to delimit a pressure chamber with a counter-surface, characterized in that the counter-surface and the guide surface are fixed to the cylinder head or the housing-fixed component;
wherein the retaining element is arranged concentrically to the at least one first valve stroke transmitting element and surrounds the at least one first valve stroke transmitting element at least in part.

2. The reciprocating-piston machine according to claim 1 , characterized in that the retaining element is formed by a piston.

3. The reciprocating-piston machine according to claim 2 , characterized in that the pressure chamber is connected hydraulically or pneumatically to a pressure source via at least one first valve, wherein the retaining element is further configured and arranged to be deflectable against a restoring force by applying pressure to the pressure chamber.

4. The reciprocating-piston machine according to claim 3 , wherein the at least one first valve is a 3/2-way valve.

5. The reciprocating-piston machine according to claim 4 , wherein the restoring force is provided by a spring.

6. The reciprocating-piston machine according to claim 2 , characterized in that the pressure chamber is configured and arranged to be connected hydraulically or pneumatically to a pressure reservoir via at least one second valve.

7. The reciprocating-piston machine according to claim 6 , wherein the at least one second valve is a throttle non-return valve.

8. The reciprocating-piston machine according to claim 2 , wherein the piston is an annular piston.

9. The reciprocating-piston machine according to claim 1 , characterized in that the at least one first valve stroke transmission element has at least one coupling region for a further valve stroke transmission element on at least one end face.

10. The reciprocating-piston machine according to claim 9 , characterized in that the further valve transmission element is formed by another push rod or another valve lever.

11. The reciprocating-piston machine according to claim 9 , wherein the at least one first valve stroke transmission element has the at least one coupling region on both end faces facing away from one another, and wherein the at least one coupling region is a ball socket.

12. The reciprocating-piston machine according to claim 1 , wherein the counter-surface and the guide surface are arranged within the cylinder head or the housing-fixed component.

13. Reciprocating-piston machine comprising:
a valve actuation device for at least one gas exchange valve;
at least one valve stroke transmission device including at least one first valve stroke transmission element, which is arranged between a valve lever and a push rod, and is configured and arranged for movement between a first position associated with a closed position of the gas exchange valve and a second position associated with an open position of the gas exchange valve; and
at least one retaining device including a retaining element, the retaining element is configured and arranged for movement between an actuation position and a release position in a cylinder head or a housing-fixed component parallel to a guide surface of the at least one first valve stroke transmission element, wherein in an actuation position the retaining element at least retards a displacement movement of the at least one first valve stroke transmission element in a direction of the second position and releases the at least one first valve stroke transmission element in the release position, wherein the retaining element includes an attack surface configured and arranged to delimit a pressure chamber with a counter-surface, characterized in that the counter-surface and the guide surface are fixed to the cylinder head or the housing-fixed component;
wherein the guide surface is formed by an outer circumferential surface of a guide sleeve fixed to the cylinder head or the housing-fixed component.

14. The reciprocating-piston machine according to claim 13 , wherein the at least one first valve stroke transmission element is displaceably mounted on an inner circumferential surface of the guide sleeve.

15. Reciprocating-piston machine comprising:
a valve actuation device for at least one gas exchange valve;
at least one valve stroke transmission device including at least one first valve stroke transmission element, which is arranged between a valve lever and a push rod, and is configured and arranged for movement between a first position associated with a closed position of the gas exchange valve and a second position associated with an open position of the gas exchange valve; and
at least one retaining device including a retaining element, the retaining element is configured and arranged for movement between an actuation position and a release position in a cylinder head or a housing-fixed component parallel to a guide surface of the at least one first valve stroke transmission element, wherein in an actuation position the retaining element at least retards a displacement movement of the at least one first valve stroke transmission element in a direction of the second position and releases the at least one first valve stroke transmission element in the release position, wherein the retaining element includes an attack surface configured and arranged to delimit a pressure chamber with a counter-surface, characterized in that the counter-surface and the guide surface are fixed to the cylinder head or the housing-fixed component;
wherein the at least one first valve stroke transmission element has a first transmission part and a second transmission part, wherein the second transmission part is displaceably mounted along a displacement axis in the first transmission part.

16. The reciprocating-piston machine according to claim 15 , wherein the at least one first valve stroke transmission element is a multi-part plunger.

Assignees

• Avl List Gmbh

Inventors

• Gelter Jürgen
• Zurk Andreas

Classifications

• F01L2001/256

  between cam and push rod · CPC title

• F01L13/06

  for braking · CPC title

• F01L13/0015

  for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque · CPC title

• F01L2305/00

  Valve arrangements comprising rollers · CPC title

• F01L13/04

  for starting by means of fluid pressure · CPC title