Internal combustion engine for a motor vehicle, in particular for a car

Patent metadata

Field	Value
Publication number	US-11808244-B2
Application number	US-202117802393-A
Country	US
Kind code	B2
Filing date	Jan 28, 2021
Priority date	Feb 26, 2020
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

An internal combustion engine of a motor vehicle includes an output shaft and a spring element which can rotate with the output shaft which is to be tensioned as a result of a deactivation of the internal combustion engine by a rotation of the output shaft, where a spring force can be provided by the spring element and where by the spring force the output shaft can be set into rotation in the event of a start following the deactivation. Via a locking device the output shaft is to be secured against a rotation after tensioning the spring element and while the spring element is tensioned. A blocking device can be shifted between a blocking state securing a first part of the spring element, which has a second part non-rotationally connected to the output shaft, against a rotation and a release state releasing the first part for a rotation.

First claim

The invention claimed is:

1. An internal combustion engine ( 16 ) of a motor vehicle, comprising:
an output shaft ( 24 ) which is rotatable around an axis of rotation ( 26 ) relative to a housing ( 22 ) of the internal combustion engine ( 16 ), wherein a torque is providable by the internal combustion engine ( 16 ) for driving the motor vehicle via the output shaft ( 24 );
a spring element ( 34 ) which is rotatable with the output shaft ( 24 ), wherein the spring element ( 34 ) is tensionable as a result of a deactivation of the internal combustion engine ( 16 ) by rotation of the output shaft ( 24 ) relative to the housing ( 22 ) around the axis of rotation ( 26 ), wherein a spring force is providable by the spring element ( 34 ) by tensioning the spring element ( 34 ), wherein the output shaft ( 24 ) is settable in rotation relative to the housing ( 22 ) around the axis of rotation ( 26 ) during a start of the internal combustion engine ( 16 ) following the deactivation by the spring force, and wherein the spring element ( 34 ) has a first part (T 1 ) and has a second part (T 2 ) that is non-rotationally connected to the output shaft ( 24 );
a locking device ( 36 ), wherein the output shaft ( 24 ) is securable against rotation relative to the housing ( 22 ) around the axis of rotation ( 26 ) after the spring element ( 34 ) has been tensioned and while the spring element ( 34 ) is tensioned by the locking device ( 36 );
a blocking device ( 38 ), wherein the blocking device ( 38 ) is adjustable between a first blocking state securing the first part (T 1 ) of the spring element ( 34 ) against a rotation taking place relative to the housing ( 22 ) around the axis of rotation ( 26 ) and a first release state releasing the first part (T 1 ) for a rotation taking place relative to the housing ( 22 ) around the axis of rotation ( 26 );
a blocking element ( 40 ), wherein the blocking element ( 40 ) is formed separately from the spring element ( 34 ) and is non-rotationally connected to the first part (T 1 ) of the spring element ( 34 ) and interacts in the blocked state with the blocking device ( 38 ), wherein the blocking element ( 40 ) and, via the blocking element ( 40 ), the first part (T 1 ) of the spring element ( 34 ) are securable against a rotation taking place in relation to the housing ( 22 ) around the axis of rotation ( 26 );
wherein the locking device ( 36 ) is movable between a second blocking state securing the output shaft ( 24 ) against rotation taking place in relation to the housing ( 22 ) around the axis of rotation ( 26 ) and a second release state releasing the output shaft ( 24 ) for rotation taking place in relation to the housing ( 22 ) around the axis of rotation ( 26 ); and
a flywheel ( 28 ) formed separately from the output shaft ( 24 ), wherein the flywheel ( 28 ) is rotatable together with the output shaft ( 24 ) and wherein the locking device ( 36 ) cooperates in a form-fit manner with the flywheel ( 28 ) in the second blocking state;
wherein the flywheel ( 28 ) and the blocking element ( 40 ) are disposed on respective sides ( 30 , 32 ) of the output shaft ( 24 ) which are opposite one another in an axial direction of the output shaft ( 24 ).

2. The internal combustion engine ( 16 ) according to claim 1 , wherein the blocking device ( 38 ) in the first blocking state interacts in a form-fit manner with the blocking element ( 40 ).

3. The internal combustion engine ( 16 ) according to claim 1 , further comprising a sensor ( 50 ), wherein a rotational speed of the output shaft ( 24 ) is detectable by the sensor ( 50 ), wherein an electrical signal characterizing a detected rotational speed is providable by the sensor ( 50 ), and wherein the blocking device ( 38 ) and/or the locking device ( 36 ) are drivable depending on the electrical signal.

Assignees

• Mercedes Benz Group Ag

Inventors

• Von Gaisberg-Helfenberg Alexander
• Stolk Thomas

Classifications

• F02N5/02 Primary

  of spring type · CPC title

• F02N5/04

  of inertia type · CPC title

• F02N15/022

  the starter comprising an intermediate clutch · CPC title

• F02N2200/022

  Engine speed · CPC title

• F02B67/04 Primary

  of mechanically-driven auxiliary apparatus · CPC title