A method for determining the start of movement of a motor vehicle equipped with a system for monitoring tire pressure of a motor vehicle. Communication between the receiver and each pressure monitoring system emitter being subjected to a Doppler effect so that a periodic component is inserted by the emitter into the signal emitted to the receiver. The method includes: acquiring the intermediate-frequency signal before demodulation by a processor to extract data carried by the radiofrequency signal, determining the FFT of the IF signal, determining the average value of the FFT of the IF signal over a preset duration, and determining whether there is a frequency deviation by comparing the instantaneous value of the fast Fourier transform to the average value of the fast Fourier transform, if so, determining whether the emitter for monitoring the pressure of a tire is moving and that the vehicle is moving.

A waveform estimating method performed by a computer, the waveform estimating method including: estimating a first vibration component of less than a first frequency in a period from a present time to a time preceding by a half wavelength of the first frequency, using an input waveform in the period, the input waveform corresponding to a driving trajectory of a vehicle traveling on a roadway; and calculating a second vibration component of the first frequency or higher in the period by subtracting the first vibration component from the input waveform.

A method of determining the level of quality of a road from an electronic measurement unit mounted in a wheel of a motor vehicle traveling on the road. The electronic measurement unit includes at least one sensor able to measure the vibrations perceived by the tread of the tire of said wheel. The method includes measuring, using the sensor, the vibrations perceived by the tread of the tire of the wheel, calculating the strength of the vibrations measured at a predetermined vibrational frequency referred to as the distinguishing frequency, comparing the calculated strength with predetermined strength values contained in a table stored in a memory zone, which are characteristic of various road quality levels, and determining the level of quality of the road from the comparison made.

An exemplary method for detecting a lateral oscillation of a vehicle includes monitoring yaw rate data and lateral acceleration data of the vehicle, analyzing the yaw rate and lateral acceleration data to generate a yaw rate signal energy distribution and a lateral acceleration signal energy distribution, determining whether a series of conditions are satisfied; and if the conditions are satisfied, automatically controlling the actuator to reduce the lateral oscillation of the vehicle. In some examples, the series of conditions includes the detection of spikes in the yaw rate and lateral acceleration data at approximately the same frequency, a magnitude of the spikes exceeding a first threshold, and a phase shift between the yaw rate and lateral acceleration data exceeding a second threshold.

Provided is a travel control device for a vehicle such that comfortable and safe control for the vehicle is possible without disturbing the driver. The travel control device for the vehicle is provided with a control command computation unit for calculating a steering assist amount for assisting the steering of the vehicle and an acceleration command value for controlling braking and driving forces of the vehicle. The control command computation unit calculates an estimated lateral position of the vehicle at a gaze distance ahead of the vehicle; calculates a lateral displacement amount of the vehicle at the estimated lateral position from a target traveling path and a lateral displacement speed; calculates a steering assist amount on the basis of the lateral displacement amount and the lateral displacement speed; calculates a lateral acceleration and lateral jerk generated by the vehicle according to the steering assist amount; and calculates an acceleration command value based on the lateral acceleration and the lateral jerk.

Provided is a power transmission control device capable of reliably performing engagement between an engagement member and a target engagement member, by operating the engagement member to slide by an actuator having an elastic member deformed by transmitting a load received by the engagement member. An actuator has an elastic member, and a control unit calculates the differential rotation between an engagement member and target engagement members on the basis of the detected rotation speeds of a first rotation shaft and a second rotation shaft, and makes differential rotation coincide with a predetermined differential rotation by adjusting the rotation speed of power sources. After the differential rotation coincides with the predetermined differential rotation, in establishing the engagement, the predetermined differential rotation sets the differential rotation on the basis of a natural frequency generated in conjunction between the actuator and the engagement member by the elastic member.

Vehicles and methods of predicting a surrounding vehicle cut-in and controlling the vehicle to accommodate the vehicle cut-in are disclosed. In one embodiment, a vehicle includes one or more sensors operable to generate data of a surrounding vehicle, one or more processors, and a non-transitory computer-readable medium storing computer-executable instructions. When the computer-executable instructions are executed by the one or more processors, the one or more processors receive the data of the surrounding vehicle, and extract one or more features from the data of the surrounding vehicle. Based on the one or more features, the one or more processors are controlled to determine a probability that the surrounding vehicle will cut in front of the vehicle, and to control the vehicle in accordance with the probability that the surrounding vehicle will cut in front of the vehicle.

A non-transitory computer readable medium contains an evaluation program that causes a computer to perform steps of obtaining a vehicle stability score of vehicle driving skills based on measured data, obtaining a turning performance score of the vehicle driving skills based on the measured data, obtaining an overall evaluation result of the vehicle driving skills based on the vehicle stability score and the turning performance score using conversion information, and conveying the overall evaluation result to an output unit. The conversion information defines the overall evaluation result such that the overall evaluation result decreases as the turning performance score increases if the vehicle stability score is lower than a threshold and such that the overall evaluation result increases as the turning performance score increases if the vehicle stability score is higher than the threshold.

A device for estimating a condition of a road surface on which a tire is travelling, the device including: an acceleration sensor 11 that detects acceleration in a tire radial direction, an acceleration waveform extracting unit 12 that extracts an acceleration waveform from the acceleration, a differential waveform calculating unit 13 that calculates a differential waveform of the acceleration waveform, a rotation time calculating unit 14 that calculates a rotation time of the tire from the differential waveform, a normalized acceleration waveform generating unit 15 that generates a normalized acceleration waveform by using the rotation time, and a road surface condition estimating unit 16 that determines whether or not a water infiltration condition between the tire and the road surface is in a condition to be shifted to a hydroplaning condition.

Systems and methods for detecting low impact collisions for a vehicle (100). The system includes at least one sensor (99, 110, 111, 115, 120-123, 125-136, 140, 141) and an electronic controller (150). The electronic controller (150) is configured to receive sensor data from the sensor (99, 110, 111, 115, 120-123, 125-136, 140, 141) and determine one or more features of the sensor data received from the at least one sensor. The electronic controller (150) is further configured to determine if a collision has occurred based upon the one or more features of the sensor data, and take at least one action in response to determining that the collision has occurred.