Abstract: A zero point estimation device is configured to perform a first acquisition process, a second acquisition process, and a zero point estimation process. The first acquisition process is a process of acquiring a plurality of first detection values of a first sensor sampled at different timings from each other while a vehicle is traveling with a change in a direction of travel. The second acquisition process is a process of acquiring a plurality of second detection values of a second sensor sampled in synchronization with the sampling timings of the first detection values to be acquired by the first acquisition process. The zero point estimation process is a process of estimating a zero point of the second sensor by using, as inputs, the plurality of first detection values acquired by the first acquisition process and the plurality of second detection values acquired by the second acquisition process.

Abstract: A jackknife suppression device is configured to execute an acquisition process, a prediction process, a determination process, and a treatment process. The acquisition process is a process of acquiring a hitch angle variable and a steered angle variable. The prediction process is a process of calculating a predicted value of the hitch angle using the hitch angle variable and the steered angle variable as inputs. The determination process is a process of determining whether there is a high risk that a jackknife occurs using the predicted value and the steered angle variable as inputs. The treatment process is a process of operating predetermined hardware in order to suppress occurrence of the jackknife when it is determined that the risk is high.

Abstract: An air amount calculation device is configured to receive a detection signal from an air amount sensor provided in an intake air passage of an engine and to calculate an air amount of air flowing through the intake air passage based on the detection signal. The air amount calculation device includes: an acquisition unit configured to acquire an air amount calculation parameter using a detection point within an intermediate range intermediate between a maximum value and a minimum value in the detection signal; and an air amount calculation unit configured to calculate the air amount based on the air amount calculation parameter.