Passive safety system

A passive safety system, comprising:

• a passive safety device mounted on a vehicle;
• and
• a passive safety control means having an acceleration sensor detecting acceleration caused by an impact at the time of collision, said passive safety control means receiving as an input an impact acceleration detection signal from the acceleration sensor and controllably operating the passive safety device,
• wherein the passive safety control means has features of computing a physical quantity based on the impact acceleration detection signal inputted from the acceleration sensor, setting maximum and minimum reference values of the physical quantity in normal driving, performing a computation with respect to addition of a present acceleration inputted from the acceleration sensor to the physical quantity when the physical quantity crosses a range defined between the maximum and minimum reference values, setting a function of operating a subtraction value or an addition value with respect to the present integrated acceleration value when the physical quantity remains within the range defined between the maximum and minimum reference values, and performing a subtraction or an addition of the integrated acceleration value based on the function to modify a reset period of the integrated acceleration value.

A passive safety system, comprising:

• a passive safety device mounted on a vehicle;
• and
• a passive safety control leans having an acceleration sensor detecting acceleration caused by an impact at the time of collision, said passive safety control means receiving as an input an impact acceleration detection signal from the acceleration sensor and controllably operating the passive safety device,
• wherein the passive safety control means has features of computing a physical quantity based on the impact acceleration detection signal inputted from the acceleration sensor, setting maximum and minimum reference values of the physical quantity in normal driving, performing a computation with respect to addition of a present acceleration inputted from the acceleration sensor to an integrated acceleration value when the physical quantity crosses a range defined between the maximum and minimum reference values, measuring a period of time after the physical quantity exceeds the range, and postponing a reset process of the integrated acceleration value when the measured time period is shorter than a required period.

A method of providing passive vehicle safety via a passive safety device and an acceleration sensor that detects acceleration caused by an impact at a time of a collision, comprising the steps of:

• computing a physical quantity based on an acceleration signal inputted from the acceleration sensor;
• setting maximum and minimum reference values of the physical quantity in normal driving;
• performing a computation with respect to addition of a present acceleration inputted from the acceleration sensor to an integrated acceleration value when the physical quantity is not within a range defined between the maximum and minimum reference values;
• and
• performing a computation with respect to a reset process of the integrated acceleration value when the physical quantity is within the range defined between the maximum and minimum reference values, wherein said acceleration sensor outputs an impact acceleration detection signal that controls operation of the passive safety device.