Apparatus of estimating vehicle weight and method using the same

Patent metadata

Field	Value
Publication number	US-10408668-B2
Application number	US-201715611292-A
Country	US
Kind code	B2
Filing date	Jun 1, 2017
Priority date	Nov 7, 2016
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

An apparatus of estimating a vehicle weight may include: an acceleration detector detecting a longitudinal direction acceleration of the vehicle; a data detector detecting state data to estimate the vehicle weight; an engine clutch disposed between an engine and a drive motor and selectively connecting the engine to the drive motor; an integrated starter-generator for starting the engine and generating electric energy; and a vehicle controller calculating a basic vehicle weight based on an engine torque, a motor torque and the longitudinal direction acceleration detected by the acceleration detector. The vehicle controller estimates a final vehicle weight based on the basic vehicle weight and a predetermined weight when an estimating entrance condition is satisfied from the state data.

First claim

What is claimed is:

1. An apparatus of estimating a vehicle weight, the apparatus comprising:
an acceleration detector configured to detect a longitudinal direction acceleration of the vehicle;
a data detector configured to detect state data for estimating the vehicle weight; and
a vehicle controller configured to calculate a basic vehicle weight based on an engine torque, a motor torque, and the longitudinal direction acceleration detected by the acceleration detector, and configured to estimate a final vehicle weight based on the basic vehicle weight and a predetermined weight when the vehicle controller determines that an estimating entrance condition is satisfied based on the state data,
wherein the vehicle controller includes:
a condition checking unit configured to determine whether the estimating entrance condition is satisfied based on the state data, and to generate an estimating confirmation signal when the estimating entrance condition is satisfied;
a generating unit configured to calculate the basic vehicle weight based on the engine torque, the motor torque, and the longitudinal direction acceleration when the estimating confirmation signal is transmitted from the condition checking unit;
an update checking unit configured to determine whether an update condition is satisfied based on a calculation time, a vehicle speed variation, and a change of gear shifting, and to generate an update confirmation signal when the update condition is satisfied; and
an estimating unit configured to calculate the final vehicle weight based on the basic vehicle weight and the predetermined weight when the update confirmation signal is transmitted from the update checking unit, and

wherein the condition checking unit is configured to:
receive a position value of an acceleration pedal, a position value of a brake pedal, a shift-stage from the data detector;
calculate a braking amount based on the position value of the brake pedal;
calculate a road slope based on the longitudinal direction acceleration; and
determine whether the estimating entrance condition is satisfied based on the position value of acceleration pedal, the braking amount, the road slope, a shift class, and a control phase of an engine clutch.

2. The apparatus of claim 1 , wherein the generating unit is configured to calculate the basic vehicle weight based on the engine torque, the motor torque, the longitudinal direction acceleration, tire dynamic radius, a shift efficiency, a clutch coefficient with respect to a state of the engine clutch, an engine friction torque, a pulley ratio between the engine and a integrated starter-generator, a vehicle speed, a generation torque of the integrated starter-generator, and a driving load coefficient.

3. The apparatus of claim 1 , wherein
the basic vehicle weight is calculated, by the generating unit, as

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tire

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fr

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Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Park Seong Ik
• Lee Soo Bang
• Cho Leehyoung
• Kwon Gi Young
• Kim Sang Joon

Classifications

• F16H59/52

  dependent on the weight of the machine, e.g. change in weight resulting from passengers boarding a bus · CPC title

• F16H59/14

  Inputs being a function of torque or torque demand · CPC title

• F16H59/48

  Inputs being a function of acceleration · CPC title

• G06F17/10

  Complex mathematical operations {(function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544)} · CPC title

• B60W2510/0657

  Engine torque · CPC title