CONTROL SYSTEM AND METHOD USING WEIGHT ESTIMATION OF HYBRID BUS

• US 20160332615A1
• Filed: 10/31/2015
• Published: 11/17/2016
• Est. Priority Date: 05/14/2015
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Moon, Se Joon
• Application Number:
  US14/929,262
• Publication Number:
  US 20160332615A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 23/00 Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for movable cabs having special adaptations of vehicle control devices B62D33/06; such control devices per se F16D, F16H
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 20/11 using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance utilising navigation and traffic information in the control strategy B60W20/12
• CPC Class Codes: B60W 20/30 Control strategies involving selection of transmission gear ratio control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H
• CPC Class Codes: B60W 2040/0872 Driver physiology
• CPC Class Codes: B60W 2300/10 Buses
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2530/10 Weight
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 40/08 related to drivers or passengers
• CPC Class Codes: G01G 19/08 for incorporation in vehicles
• CPC Class Codes: G01G 19/44 for weighing persons
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/902 Prime movers comprising electrical and internal combustion motors

Abstract

A system and method using weight estimation of a hybrid bus can estimate in real-time the entire weight of the hybrid bus according to the number of passengers using a transportation card reader in the hybrid bus, select a power distribution map and a transmission map according to the estimated entire weight of the hybrid bus, control a power split ratio of an engine and a motor by the selected map, and determine a transmission gear stage.

Claims

1. A control system using weight estimation of a hybrid bus, comprising:

a transportation card reader configured to generate a card tag signal whenever a passenger getting on and off the hybrid bus touches a transportation card to the transportation card reader; and

a vehicle controller configured to calculate a gross weight of the hybrid bus comprising an entire weight of passengers by detecting the number of passengers based on the card tag signal, selecting an optimal power distribution map based on the gross weight of the vehicle from a plurality of power distribution maps pre-configured in accordance with the gross weight of the vehicle, and controlling a power split ratio of an engine and a motor by the selected power distribution map.

2. The control system of claim 1, wherein the plurality of power distribution maps are configured to order the power split ratio of the engine and the motor in accordance with a required torque of a driver and a current vehicle speed, respectively.

3. The control system of claim 1, wherein the vehicle controller selects an optimal transmission map based on the gross weight of the hybrid bus from a plurality of transmission maps pre-configured in accordance with the gross weight of the hybrid bus, and determines a gear stage of a transmission by the selected transmission map.

4. The control system of claim 3, wherein the plurality of transmission maps are configured to order the gear stage of the transmission in accordance with a required torque of a driver and a current vehicle speed.

5. The control system of claim 1, wherein the card tag signal comprises information on types of passengers getting on and off the vehicle, and the vehicle controller accumulatively counts the number of passengers remaining in the vehicle for each type based on the card tag signal and calculates the entire weight of passengers by multiplying the number of passengers remaining in the vehicle for each type by the standard weights for each type.

6. A control method using weight estimation of a hybrid bus, comprising:

counting a number of passengers in the hybrid bus for each type of a plurality of types of passengers based on a card tag signal of a transportation card reader;

calculating a gross weight of a vehicle comprising an entire weight of passengers according to the number of passengers counted for each type; and

selecting an optimal power distribution map based on the gross weight of the vehicle from a plurality of power distribution maps pre-configured in accordance with the gross weight of a vehicle and controlling a power split ratio of an engine and a motor by the selected power distribution map.

7. The control method of claim 6, comprising selecting an optimal transmission map based on the gross weight of the vehicle from a plurality of transmission maps pre-configured in accordance with the gross weight of the vehicle and determining a gear stage of a transmission by the selected transmission map.

8. The control method of claim 6, wherein the counting of the number of passengers comprises:

accumulatively counting the number of passengers getting on the vehicle for each type based on the card tag signals of passengers getting on the vehicle;

accumulatively counting the number of passengers getting off the vehicle for each type based on the card tag signals of passengers getting off the vehicle; and

counting the number of passengers remaining in the vehicle for each type by subtracting the number of passengers getting off the vehicle from the number of passengers getting on the vehicle for each type.

9. The control method of claim 6, wherein the calculating of the gross weight of the vehicle comprises calculating the entire weight of passengers by multiplying the number of passengers remaining in the vehicle for each type by the standard weights of passengers for each type and calculating the gross weight of the vehicle by summing up the entire weight of passengers and an empty vehicle weight without any passengers.