Actuation system for vehicle passenger protective device

An actuation system of a passenger protective device for a motor vehicle, comprising:

• means for detecting acceleration of said motor vehicle and generating an electric acceleration signal indicative of the detected motor vehicle acceleration;
• means for storing samples of said acceleration signal at a plurality of most current time intervals;
• first means for successively integrating said acceleration signal over a first predetermined integration period, said first integrating means including first means for summing a first set of most current samples of said acceleration signal stored during said first predetermined integration period and obtaining a first integration value;
• second means for successively integrating said acceleration signal over a second predetermined integrating period, said second integrating means including second means for summing a second set of most current samples of said acceleration signal stored during said second predetermined integration period and obtaining a second integration value, said first predetermined integration period being longer than said second predetermined integration period;
• means for determining whether said motor vehicle is in a collision state based on said first integration value and said second integration value;
• and
• means for actuating said passenger protective device when said determining means determines that said motor vehicle is in said collision state.

An actuation system of a passenger protective device for a motor vehicle, comprising:

• a single acceleration detection device for detecting accelerations of said motor vehicle and generating an acceleration signal indicative of the detected motor vehicle accelerations;
• first means for successively integrating samples of said acceleration signal over a first predetermined integration period and obtaining a first integration value;
• means for deciding whether said motor vehicle is in a collision state based on comparing said first integration value with a first threshold value;
• and
• means for actuating said passenger protective device in response to said deciding means.

An actuation system of a passenger protective device for a motor vehicle, comprising:

• a single acceleration detecting device for detecting an acceleration of said motor vehicle and generating an acceleration signal indicative of said detected acceleration;
• means for integrating said acceleration signal over successive predetermined periods and producing successive integration values;
• means for storing a present integration value and a previous integration value, said storing means being updated each successive predetermined period;
• means for calculating a difference between said present integration value and said previous integration value for each successive predetermined period;
• means for determining whether said integration difference exceeds a predetermined value so as to determine a collision state of said motor vehicle;
• and
• means for actuating said passenger protective device based on said collision state of said motor vehicle.