Isuzu Motors has been granted a patent for an automatic transmission system. The system includes multiple rotating shafts, gears, synchronizing mechanisms, a lubricating oil storage part, a shift position detection unit, and a control unit. The control unit operates the synchronizing mechanisms and connects the clutch when the neutral position is detected. GlobalData’s report on Isuzu Motors 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 Isuzu Motors, collision avoidance system was a key innovation area identified from patents. Isuzu Motors's grant share as of September 2023 was 29%. Grant share is based on the ratio of number of grants to total number of patents.

Automatic transmission with synchronized gear shifting and clutch engagement

Source: United States Patent and Trademark Office (USPTO). Credit: Isuzu Motors Ltd

A recently granted patent (Publication Number: US11761533B2) describes an automatic transmission system with several innovative features. The system includes multiple rotary shafts, including an input shaft with a clutch and an output shaft for transmitting drive force. It also features a variety of gears, including an output-side gear on the output shaft. Additionally, the system incorporates synchromesh mechanisms, including an output-side synchromesh mechanism that enables coupling between the output shaft and the output-side gear.

One notable aspect of the system is the presence of a lubricant oil reservoir that stores oil stirred up by the rotation of the gears. This reservoir ensures a steady supply of lubricant oil for the transmission system, promoting smooth operation and reducing wear and tear.

The system also includes a shift position detection section that identifies the selected shift position, including the neutral position. A control section is responsible for activating one or more of the synchromesh mechanisms, excluding the output-side synchromesh mechanism. This activation causes the selected synchromesh mechanism(s) to couple between one or more of the rotary shafts (excluding the output shaft) and one or more of the gears (excluding the output-side gear). Subsequently, the control section engages the clutch, connecting it to the system, once the neutral position is detected.

In another embodiment, the system incorporates multiple input shafts, each with its own clutch. The control section engages the clutch(es) when the neutral position is detected, ensuring smooth operation during gear shifting.

The patent also describes a warming-up method for the automatic transmission system. This method involves activating one or more synchromesh mechanisms (excluding the output-side synchromesh mechanism) to couple between one or more rotary shafts (excluding the output shaft) and one or more gears (excluding the output-side gear). After this coupling, the clutch is engaged, connecting it to the system. This warming-up method is particularly useful when the neutral position is detected among the various shift positions.

Overall, this granted patent showcases an automatic transmission system with various innovative features, including the use of synchromesh mechanisms, a lubricant oil reservoir, and a warming-up method. These features aim to enhance the performance, efficiency, and durability of the transmission system.

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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.