The present disclosure includes a system, method, and device related to data collection and communication related to after-market and external vehicle systems, such as towing systems, cargo carrying systems, trailer breakaway systems, brake systems, braking control systems, and the like. Data is sensed, processed, shared, and further leveraged throughout the discrete components of the system, and possibly via internet and other communications' links, to effect various beneficial actions with minimal driver/user interaction or intervention. In the same manner, data from the system may be used for diagnostic reasons, safety controls, and other purposes.

A hill start assist control (HAC) method and system for vehicles is provided to prevent malfunction and sensitive operation of an HAC function, generated due to misrecognition of a flat road as a hill when the vehicle is accelerated after braking on the flat road, caused by use of a value sensed by an acceleration sensor in determination of a hill. For this purpose, a corrected gradient, in which a tilt of the vehicle in the pitch direction is reflected in a gradient acquired from the value sensed by the acceleration sensor, is used as an actual road gradient value.

A method of and system for detecting absolute acceleration along various axes relative to a desired movement vector while moving relative to a gravity source includes steps of determining a vertical acceleration, perpendicular to the desired movement vector and substantially anti-parallel to a gravitational acceleration due to the gravity source; determining a longitudinal acceleration, parallel to the desired movement vector and to output at vertical acceleration signal and a longitudinal acceleration signal; determining an inclination of the desired movement vector relative to the gravitational acceleration; and processing the vertical acceleration signal, the longitudinal acceleration signal, and the inclination signal to produce an absolute vertical acceleration signal and an absolute longitudinal acceleration signal.

This disclosure relates to a system and method for detecting vehicle events. Some or all of the system may be installed in a vehicle, operate at the vehicle, and/or be otherwise coupled with a vehicle. The system includes one or more sensors configured to generate output signals conveying information related to the vehicle. The system receives contextual information from a source external to the vehicle. The system detects a vehicle event based on the information conveyed by the output signals from the sensors and the received contextual information.

The vehicle behavior control device comprises a PCM configured to decide a target additional deceleration. The PCM is operable: to correct the target additional deceleration in such a manner that it is reduced by multiplying the target additional deceleration by a coefficient K1 set according to a vehicle speed, a coefficient K2 set according to a steering wheel angle, a coefficient K3 set according to an accelerator position and a coefficient K4 decided according to a required deceleration; when a value derived by multiplying the target additional deceleration by K1 and K2 is less than a threshold D.sub.T, to stop a torque reduction control; and, when the value derived by multiplying the target additional deceleration by K1 and K2 is equal to or greater than D.sub.T, and a value derived by multiplying the target additional deceleration by K3 and K4 is less than D.sub.T, to maintain the torque reduction control.

This disclosure relates to a system and method for detecting vehicle events. Some or all of the system may be installed in a vehicle, operate at the vehicle, and/or be otherwise coupled with a vehicle. The system includes one or more sensors configured to generate output signals conveying information related to the vehicle. The system receives contextual information from a source external to the vehicle. The system detects a vehicle event based on the information conveyed by the output signals from the sensors and the received contextual information.

A method of and system for detecting absolute acceleration along various axes relative to a desired movement vector while moving relative to a gravity source includes steps of determining a vertical acceleration, perpendicular to the desired movement vector and substantially anti-parallel to a gravitational acceleration due to the gravity source; determining a longitudinal acceleration, parallel to the desired movement vector and to output at vertical acceleration signal and a longitudinal acceleration signal; determining an inclination of the desired movement vector relative to the gravitational acceleration; and processing the vertical acceleration signal, the longitudinal acceleration signal, and the inclination signal to produce an absolute vertical acceleration signal and an absolute longitudinal acceleration signal.

A stopping control apparatus for a vehicle includes: a braking apparatus; a gear-type automatic transmission installed in a powertrain; and a control device configured to control the braking apparatus and the automatic transmission. The control device is configured to shift, after a vehicle transitions from a travel state to a stop state, a range of the automatic transmission to a P range under a state where the braking force applied to wheels is a braking force for maintaining the vehicle in the stop state, and then reduce the braking force applied to the wheels. The control device is configured to change a decrease rate of the braking force such that the decrease rate after a time point at which a predetermined period has elapsed from a start of a decrease in the braking force is less than the decrease rate before the time point.

A method for operating a motor vehicle generates a change-operating-mode signal to change operation from a normal mode with an engine engaged and running to a coasting mode with the engine disengaged and/or switched off in response to a freewheeling distance exceeding a threshold. The freewheeling distance may be based on state parameters of the motor vehicle, such as position, speed, acceleration, weight, tire pressure, braking pressure, and air resistance, for example, data related to a second vehicle obtained from forward sensors, for example, and/or ambient parameters such as air temperature, wind speed, and wind direction, for example.

A hill start assist control (HAC) method and system for vehicles is provided to prevent malfunction and sensitive operation of an HAC function, generated due to misrecognition of a flat road as a hill when the vehicle is accelerated after braking on the flat road, caused by use of a value sensed by an acceleration sensor in determination of a hill. For this purpose, a corrected gradient, in which a tilt of the vehicle in the pitch direction is reflected in a gradient acquired from the value sensed by the acceleration sensor, is used as an actual road gradient value.