The physical quantity sensor includes a substrate having several areas, a movable body, and a detection electrode. The detection electrode straddles the several areas. When setting a first imaginary straight line which is the smallest in an angle formed with an X-axis direction of imaginary straight lines connecting two of end parts on respective areas of the detection electrode, and a second imaginary straight line extending along a principal surface of the movable body in a maximum displacement state around the oscillation axis, the first and second imaginary straight lines fail to cross each other in an area between a first normal line which passes the end part of the first one of the several areas and a second normal line which passes the end part of the last one of the several areas.

An anti-rollover system and method for mitigating vehicle rollover. The system having a plurality of anti-rollover devices positioned around the vehicle chassis and being operable to calculate the likelihood of a vehicle rollover and determine the attitude of rollover there by actuating the anti-rollover device to counter roll thereby preventing a rollover collision.

An anti-rollover apparatus and control method for heavy-duty vehicles with a pneumatic brake system includes an anti-yaw module, an anti-roll module, an electronic control unit (ECU) (10), a yaw velocity sensor (12), and a vehicle roll angle sensor (18). The ECU (10) controls solenoid valves (4, 9, 11, 19, and 24) to achieve braking of part of wheels to obtain anti-yaw torques and improve the yaw stability of the heavy-duty vehicles. The ECU (10) controls gas switch valves (21 and 22) to spray high-pressure gases recovered in brake chambers (1, 13, 16, and 26) out, anti-roll torques are obtained through the jet reactive force, and the roll stability of the heavy-duty vehicles is improved.

A computer implemented method for localizing an occupant within a vehicle includes identifying whether at least one occupant is present within the vehicle based on a signal of an ultrasonic sensor and determining information regarding an inclination of the vehicle based on at least one signal of an inclination sensor. Based on the information regarding inclination of the vehicle, it is determined whether an occupant is present in one of a plurality of predefined sections of the vehicle if the presence of at least one occupant within the vehicle is identified.

A vehicle safety device for detecting vehicle tilt automatically shuts-off power to an ignition system and fuel pump and summons emergency assistance using a bistable switch circuit that toggles between a first bistable switch position in response to a reset signal and a second bistable switch position in response to an alert signal. The safety device can remain in the bistable switch positions without a power source and employ an encrypted bi-directional protocol to summon emergency assistance and generate the reset signal without vehicle operator intervention.

The physical quantity sensor includes a movable body oscillating around an oscillation axis, and a detection electrode disposed so as to be opposed to the movable body. The substrate has a first area through an m-th area, and the detection electrode is disposed so as to straddle the first area through an n-th area. When setting a first imaginary straight line which is the smallest in an angle formed with an X-axis direction out of imaginary straight lines connecting two of end parts on respective areas of the first area through the n-th area of the detection electrode, and a second imaginary straight line extending along a principal surface located at the substrate side of the movable body in a state in which the movable body makes a maximum displacement around the oscillation axis, the first imaginary straight line and the second imaginary straight line fail to cross each other in an area between a first normal line which passes the end part of the first area, and which extends in the Z-axis direction, and a second normal line which passes the end part in the n-th area, and which extends in the Z-axis direction.

An anti-rollover apparatus and control method for heavy-duty vehicles with a pneumatic brake system includes an anti-yaw module, an anti-roll module, an electronic control unit (ECU) (10), a yaw velocity sensor (12), and a vehicle roll angle sensor (18). The ECU (10) controls solenoid valves (4, 9, 11, 19, and 24) to achieve braking of part of wheels to obtain anti-yaw torques and improve the yaw stability of the heavy-duty vehicles. The ECU (10) controls gas switch valves (21 and 22) to spray high-pressure gases recovered in brake chambers (1, 13, 16, and 26) out, anti-roll torques are obtained through the jet reactive force, and the roll stability of the heavy-duty vehicles is improved.

A vehicle safety system includes an actuatable restraint for helping to protect a vehicle occupant and a controller for controlling actuation of the actuatable restraint in response to a vehicle rollover event. The controller is configured to execute a discrimination algorithm comprising at least one classification metric that utilizes at least one of vehicle pitch rate (P_RATE) and vehicle roll acceleration (D_RATE) to discriminate at least one of a ramp rollover event and a soil rollover event from an embankment rollover event. The discrimination algorithm determines a classification of the vehicle rollover event as one of a ramp rollover event, a soil rollover event, and an embankment rollover event. The controller is also configured to select a deployment threshold for deploying the actuatable restraint. The deployment threshold corresponds to the classification of the vehicle rollover event.

A vehicle safety system for helping to protect a vehicle occupant in the event of a frontal collision includes a controller, one or more crash sensors for sensing a frontal collision, and an active sensor for detecting objects in the path of the vehicle. The controller is configured to implement crash discrimination metrics that detect the occurrence of a frontal collision in response to signals received from the crash sensors. The crash discrimination metrics implement thresholds for determining whether the signals received from the crash sensors indicate the occurrence of a frontal collision. The controller is configured to implement an algorithm that uses information obtained from the active sensor to detect an object in the path of the vehicle and to select the thresholds implemented in the crash discrimination metrics in response to detecting the object.

A method for controlling the actuation of an actuatable restraint to help protect a vehicle occupant in response to a rollover event is implemented in a controller of a vehicle safety system that includes the actuatable restraint. To implement the method, the controller is configured to execute a roll discrimination metric that discriminates the occurrence of a ramp rollover event or an embankment rollover event in response to a vehicle roll rate (R_RATE) having a magnitude that exceeds a predetermined threshold roll rate (R_RATE). The controller is also configured to execute a switching metric that is operative to reduce the predetermined threshold roll rate (R_RATE) in response to a vehicle pitch rate (P_RATE) having a magnitude that exceeds a predetermined threshold pitch rate (P_RATE).