US 12,003,077 B2
Method for installing spark plugs on a cylinder head of an internal combustion engine, and internal combustion engine
Karsten Michels, Magdeburg (DE); and Reinhard Strich, Meine (DE)
Assigned to Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed by Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed on Aug. 28, 2023, as Appl. No. 18/238,576.
Claims priority of application No. 10 2022 121 764.7 (DE), filed on Aug. 29, 2022.
Prior Publication US 2024/0072519 A1, Feb. 29, 2024
Int. Cl. H01T 13/08 (2006.01); F02F 1/24 (2006.01)
CPC H01T 13/08 (2013.01) [F02F 1/242 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for installing a spark plug on a cylinder head of a combustion chamber of an internal combustion engine, the method comprising:
incorporating an oriented thread on the spark plug and a corresponding internal thread in a hole in the cylinder head of the internal combustion engine for receiving the spark plug;
arranging a sealing element between a contact surface of the cylinder head and a shoulder of the spark plug;
inserting the spark plug in the hole in the cylinder head and screwing the thread of the spark plug into the internal thread of the hole; and
finely aligning the spark plug in terms of a position with respect to an angle of rotation relative to the combustion chamber, wherein the sealing element is pressed during the fine alignment until a final angular position of the spark plug is reached,
wherein a check is made once the final angular position is reached as to whether a predetermined threshold value for a minimum installation torque has been reached, and if it has not been reached, then the spark plug is rotated further by 360°.