Zhejiang Geely Holding Group has been granted a patent for a compact assembly that accurately measures air flow in an internal combustion engine’s air intake duct. The assembly includes a housing with an inlet and outlet opening, a channel with a closure member, and two annular chambers. Pressure sensors are connected to measure pressure and pressure difference. The design aims to be easy to manufacture and maintain. GlobalData’s report on Zhejiang Geely Holding Group 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 Zhejiang Geely Holding Group, HEV energy management was a key innovation area identified from patents. Zhejiang Geely Holding Group's grant share as of September 2023 was 70%. Grant share is based on the ratio of number of grants to total number of patents.

Compact assembly for measuring air flow in engine intake duct

Source: United States Patent and Trademark Office (USPTO). Credit: Zhejiang Geely Holding Group Co Ltd

A recently granted patent (Publication Number: US11774310B2) describes an assembly for measuring air flow in the air intake duct of an internal combustion engine. The assembly includes a housing with an inlet opening and an outlet opening, as well as a channel with an inner wall that defines a predetermined cross-sectional area. The housing also features a closure member that can move between a closed and opened position within the channel.

The housing is designed with two annular chambers, one upstream and one downstream of the closure member. These chambers extend around the channel, with no fluid connection between them. Each chamber has an inner chamber wall defined by the inner wall of the channel and is equipped with a number of apertures that allow fluid communication with the channel.

The assembly incorporates two pressure sensors, one connected to the first chamber and the other connected to both the first and second chambers. These sensors measure the pressure in the first chamber and the difference in pressure between the first and second chambers, respectively.

Notably, both sensors are mounted on the exterior of the housing and do not have any parts that project into the channel. This design ensures that the sensors do not interfere with the air flow measurement process.

The patent also mentions that the cross-sectional areas of the inner wall at the first and second chambers are equal. Additionally, the housing includes an insert that engages with the upstream and downstream end parts of the channel. This insert has an inner wall part with the apertures and a bottom wall part that defines the bottom of each chamber.

The axial distance (D) of the chambers from the closure member is specified to be between 3 mm and 5 cm.

Furthermore, the assembly can be connected to a control unit that is linked to each pressure sensor and an actuator for the movement of the closure member. The control unit utilizes the pressure signals from the sensors to regulate the position of the closure member.

In addition to the assembly, the patent also covers a vehicle that incorporates this assembly for controlling air flow to the cylinders of an internal combustion engine. The vehicle includes the same features and design elements as described for the assembly.

Overall, this patented assembly offers a precise and efficient method for measuring air flow in the air intake duct of an internal combustion engine, with potential applications in the automotive industry.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.