US 12,366,833 B2
Method for adjusting a clock on board a motor vehicle and associated adjusting device
Christophe Mestrie, Toulouse (FR); Sébastien Chanal, Toulouse (FR); Bertrand Venzal, Toulouse (FR); and Stefan Hammes, Toulouse (FR)
Assigned to CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH, Hannover (DE)
Appl. No. 17/765,604
Filed by Continental Automotive GmbH, Hannover (DE)
PCT Filed Oct. 29, 2020, PCT No. PCT/EP2020/080424
§ 371(c)(1), (2) Date Mar. 31, 2022,
PCT Pub. No. WO2021/094098, PCT Pub. Date May 20, 2021.
Claims priority of application No. 1912618 (FR), filed on Nov. 12, 2019.
Prior Publication US 2022/0365490 A1, Nov. 17, 2022
Int. Cl. G04R 40/06 (2013.01); G04R 20/02 (2013.01)
CPC G04R 40/06 (2013.01) [G04R 20/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for adjusting a clock on board a motor vehicle, said clock providing an actual time for functions of the vehicle, said vehicle being connected via wireless communication to a data server, said method comprising:
the server transmitting a sequence of consecutive actual-time values, all separated from one another by a fixed time interval;
the vehicle receiving the actual-time values shifted by an unknown and variable time of flight between transmission and reception;
for each received actual-time value:
calculating a difference between an actual-time value received at a given instant and an actual-time value received at a previous instant,
calculating a discrepancy between said difference thus calculated and the fixed time interval, and
calculating a cumulative disparity, consisting in summing the discrepancy calculated for a time value received at one instant and a time value received at the previous instant, and
determining the actual time for adjusting the on-board clock according to said disparity.