US 12,216,022 B2
Chassis dynamometer system which can prevent a decline in responsiveness
Toshimichi Takahashi, Tokyo (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 18/689,796
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Sep. 5, 2022, PCT No. PCT/JP2022/033242
§ 371(c)(1), (2) Date Mar. 6, 2024,
PCT Pub. No. WO2023/033168, PCT Pub. Date Mar. 9, 2023.
Claims priority of application No. 2021-144779 (JP), filed on Sep. 6, 2021.
Prior Publication US 2024/0264042 A1, Aug. 8, 2024
Int. Cl. G01M 17/007 (2006.01)
CPC G01M 17/0072 (2013.01) 10 Claims
OG exemplary drawing
 
1. A chassis dynamometer system for a vehicle with a first wheel and a second wheel, the chassis dynamometer system comprising:
a first driven member and a second driven member on which the first wheel and the second wheel are respectively placed, and driven by rotation of each;
a first dynamometer and a second dynamometer respectively coupled to the first driven member and the second driven member;
a first speed sensor which detects a first speed of the first dynamometer;
a second speed sensor which detects a second speed of the second dynamometer; and
a control device configured to generate a first torque current command for the first dynamometer and a second torque current command for the second dynamometer based on outputs of the first and second speed sensors, wherein the control device includes:
an uniform-speed synchronization controller configured to generate a synchronization correction input for the first dynamometer and the second dynamometer so that a speed difference between the first speed and the second speed is eliminated;
a first drive force estimator configured to estimate a first drive force transferred from the first wheel to the first driven member;
a second drive force estimator configured to estimate a second drive force transferred from the second wheel to the second driven member;
a load balance processor configured to generate a first load balance correction input for the first dynamometer, and a second load balance correction input for the second dynamometer, based on the first drive force and the second drive force;
a first torque current command generator configured to generate and input to the first dynamometer the first torque current command based on the first load balance correction input and the synchronization correction input; and
a second torque current command generator configured to generate and input to the second dynamometer the second torque current command based on the second load balance correction input and the synchronization correction input,
wherein the load balance processor independently varies the first load balance correction input and the second load balance correction input, and raises the first load balance correction input as the second drive force increases, and raises the second load balance correction input as the first drive force increases.