Gear step estimation method, gear step estimation device, and non-transitory computer-readable storage medium

A non-transitory computer-readable storage medium storing a gear step estimation program of estimating a gear step of a switching transmission device in a vehicle including

• a power source, and
• the switching transmission device provided in a power transmission path between the power source and a wheel, and capable of switching the gear step among n gear steps (n is a natural number of 2 or more),
• the gear step estimation program causing a processor to execute:
• a process of acquiring, at a first time, a first gear ratio that is a gear ratio of a transmission section including the switching transmission device, the transmission section being a whole or a part of the power transmission path;
• a process of comparing the acquired first gear ratio with n reference values set within a range of possible gear ratios taken by the n gear steps;
• and
• a process of estimating the gear step of the switching transmission device as an m-step (m is a natural number of 1 or more and n or less) in a case where the first gear ratio matches an m-th reference value from a smallest among the n reference values.

A gear step estimation device that estimates a gear step of a switching transmission device in a vehicle including

• a power source, and
• the switching transmission device provided in a power transmission path between the power source and a wheel, and capable of switching the gear step among n gear steps (n is a natural number of 2 or more),
• the gear step estimation device including:
• an acquisition unit configured to acquire, at a first time, a first gear ratio that is a gear ratio of a transmission section including the switching transmission device, the transmission section being a whole or a part of the power transmission path;
• and
• an estimation unit configured to compare the first gear ratio acquired by the acquisition unit with n reference values set within a range of possible gear ratios taken by the n gear steps, and
• estimate the gear step of the switching transmission device as an m-step (m is a natural number of 1 or more and n or less) in a case where the first gear ratio matches an m-th reference value from a smallest among the n reference values.