Isuzu Motors has patented a steering device for vehicles that reduces motor size by positioning a power steering unit below the vehicle floor and a coaxial motor directly above it. The device also includes a reactive force motor, steering shaft, and control device for efficient steering control. 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 February 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.

Steering device with reduced motor size for vehicles

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

A recently granted patent (Publication Number: US11897556B2) discloses a novel steering device designed to be mounted on a vehicle. The steering device includes a power steering unit with a gear structure that amplifies rotational force, a coaxial motor positioned below the vehicle cabin floor, and a reactive force motor above the cabin floor. A steering shaft connects the steering wheel to the reactive force motor, with a control device calculating rotational direction and amount based on torque and steering angle to control the motors accordingly. This innovative design aims to enhance steering control and responsiveness in vehicles.

Furthermore, the patent details the inclusion of a hydraulic power steering unit with multiple oil pumps, including a main pump and a sub pump for backup. The steering assembly, operated by the driver via the steering wheel, is mechanically separated from the power steering assembly, which is located outside the vehicle cabin below the floor. The coaxial motor generates rotational force based on steering wheel input, contributing to the overall steering mechanism. With the steering shaft not mechanically connected to the coaxial motor, this system offers a unique approach to steering technology, potentially improving efficiency and performance in vehicle steering systems.

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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.