| US 7,575,288 B2 | ||
| System for controlling the state and operation of a motor vehicle | ||
| Vincent Hernette, Paris (France); Francois Bailleux, Val d'Albian (France); and Vincent Abadie, Sartrouville (France) | ||
| Assigned to Peugeot Citroen Automobiles SA, Velizy Villacoublay (France) | ||
| Appl. No. 10/544,209 PCT Filed Feb. 06, 2004, PCT No. PCT/FR2004/000278 § 371(c)(1), (2), (4) Date Jan. 12, 2006, PCT Pub. No. WO2004/071835, PCT Pub. Date Aug. 26, 2004. |
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| Claims priority of application No. 03 01487 (FR), filed on Feb. 07, 2003. | ||
| Prior Publication US 2006/0202554 A1, Sep. 14, 2006 | ||
| Int. Cl. B60T 8/00 (2006.01) | ||
| U.S. Cl. 303—192 | 16 Claims |
| 1. System for controlling the state and operation of a motor vehicle equipped with a dynamic braking device and a static braking
device, comprising
a plurality of sensors (C1, . . . Cn) on board the vehicle, including a sensor of the longitudinal deceleration of the vehicle, at least one sensor
of the rotation speed of one of the wheels of the vehicle, a sensor of the displacement of the wheels of the vehicle with
respect to the body of the vehicle, and a sensor of the pressure of the master cylinder, and
a piloting device receiving information from the plurality of sensors and determining from said information and from information
representative of the states of the brake and acceleration pedals of the vehicle, the state of the vehicle and calculating
braking orders transmitted to the dynamic and static braking devices,
wherein the system performs the following actions: (i) to maintain the vehicle immobilized as soon as the speed of the vehicle
is zero, (ii) to restart the vehicle after it has stopped, (iii) to trigger a controlled deceleration of the vehicle, and
(iv) to ensure a secure braking of the vehicle in a stopped state of the vehicle,
wherein the piloting device determines the slope on which the vehicle is moving by calculating the difference between the
value of the longitudinal deceleration of the vehicle provided by the sensor of the longitudinal deceleration and the value
of the longitudinal deceleration calculated from the sensor of the rotation speed of a wheel of the vehicle to determine a
shift value of the longitudinal deceleration γlongislope and by calculating the slope according to the formula:
 wherein g is the acceleration of gravity.
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