| 摘要 |
PROBLEM TO BE SOLVED: To provide a car weight estimation device capable of estimating car weight with high accuracy even while driving on a bad road.SOLUTION: The car weight estimation device includes: an engine 2 for outputting engine driving force to an output axis 21; a longitudinal acceleration sensor 16 for detecting longitudinal acceleration (a); driving force computing means 13a for computing a vehicle driving force F which derives from the engine driving force and acts on the vehicle; bad road index computing means 13b for acquiring a bad road index Ro; condition fulfillment-time estimated car weight computing means 13c for computing a condition fulfillment-time estimated car weight M on the basis of the longitudinal acceleration (a) and the vehicle driving force F at the time of fulfillment of a prescribed condition; and estimated car weight computing means 13d for computing estimated car weight Me on the basis of the previous condition fulfillment-time estimated car weight M every time a condition fulfillment-time estimated car weight M is computed. The estimated car weight computing means 13d performs computing by restricting influence the condition fulfillment-time estimated car weight M has on the estimated car weight Me to be smaller, as the bad road index Ro is greater when the condition fulfillment-time estimated car weight M is computed. |
