Tenneco. has been granted a patent for a piston designed for internal combustion engines. The piston features a crown and skirt with friction-reducing coatings and strategically arranged depressions, ensuring optimal spacing and alignment to enhance performance and reduce friction against the cylinder wall. GlobalData’s report on Tenneco gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Tenneco, Piston head combustion chambers was a key innovation area identified from patents. Tenneco's grant share as of June 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
Piston design with friction-reducing coatings and depressions
The patent US12037960B2 presents a novel piston design for internal combustion engines, characterized by a piston crown and skirt that features friction-reducing coatings. The piston skirt is engineered with surfaces that maintain a specific height and make contact with the cylinder wall during operation. A key aspect of the design is the inclusion of multiple depressions within the coating, arranged such that the spacing (S) between adjacent depressions exceeds twice their width (L), adhering to the condition S > 2L. Additionally, the spacing S is limited to less than 10% of the height of the piston skirt surfaces, enhancing the performance and efficiency of the piston.
Further claims detail the structural attributes of the depressions, which may extend through the coating to the underlying material of the piston skirt. The boundary surfaces of these depressions can be angled relative to the coating and skirt material, and their circumferential extension may be shorter than that of the coating itself. The design allows for adjacent depressions to be offset in the circumferential direction, and they are typically rectangular with a width of less than 2 mm, ideally between 0.6 to 0.8 mm. The method of producing this piston involves applying the coating with depressions through a screen-printing technique, ensuring that all depressions are enclosed by the coating, thereby contributing to the overall functionality and durability of the piston in engine applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
