Hitachi Astemo Ltd.

Vaibhav Gupta

Yuichiro Minakuchi

The present invention achieves a technique that not only makes it possible to reduce sensor-related cost but also makes it possible to estimate a ground contact load of a vehicle with sufficiently high accuracy. A ground contact load estimation device () causes an acquisition section to acquire a physical quantity related to a vehicle, causes a reference inertia load calculation section () to calculate a reference inertia load with use of the physical quantity, uses the physical quantity to cause a correction value calculation section () to calculate an inertia load correction value, and causes an inertia load estimation section () to estimate an inertia load by adding the inertia load correction value to the reference inertia load.

Grounding load estimation device, control device, and grounding load estimation method

The present invention achieves a technique that makes it possible to estimate a ground contact load of a vehicle with sufficiently high accuracy. A ground contact load estimation device () acquires a wheel angular speed, a steady load, and an inertia load of a vehicle, uses the steady load and the inertia load to cause a first gain calculation section () to calculate a first gain, multiplies a variation in wheel angular speed by a second gain so as to cause a tire effective radius variation calculation section () to calculate a tire effective radius variation, and multiplies the tire effective radius variation by the first gain so as to estimate a road surface load.

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Ibaraki, Japan

Vaibhav Gupta