Search

JP-2026074812-A - decision device

JP2026074812AJP 2026074812 AJP2026074812 AJP 2026074812AJP-2026074812-A

Abstract

[Problem] To appropriately determine the energy required for a vehicle to travel on a road. [Solution] The determination device 200 includes an acquisition unit 221 that acquires the road conditions of the route that a vehicle, powered by a motor 141 that operates using the power of a fuel cell 110 and a secondary battery 120, is scheduled to travel, and the weight of the vehicle at its current position; an identification unit 222 that identifies a rolling resistance coefficient corresponding to the acquired road conditions by referring to a data table that associates each of several road conditions with the rolling resistance coefficient when the vehicle's wheels roll on a road in that condition; and a determination unit 223 that determines the electrical energy required for the vehicle to travel along the route using the rolling resistance determined by the product of the identified rolling resistance coefficient and the acquired weight. [Selection Diagram] Figure 2

Inventors

  • 廣澤 友章

Assignees

  • いすゞ自動車株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (7)

  1. An acquisition unit that acquires the route a vehicle, powered by a motor that operates using electricity from a fuel cell and a secondary battery, is scheduled to travel from the vehicle's current position to a target position at a predetermined distance, the road conditions along that route, and the weight of the vehicle at the current position. A specific unit identifies the rolling resistance coefficient corresponding to the acquired road condition by referring to a data table that associates each of several road conditions with the rolling resistance coefficient when the vehicle's wheels roll on a road in that condition. A determination unit that determines the electrical energy required for the vehicle to travel along the path, using the rolling resistance determined by the product of the identified rolling resistance coefficient and the acquired weight, A decision device having
  2. The acquisition unit acquires the road conditions of a new route from the vehicle's current position to a predetermined distance ahead while the vehicle is traveling along the route on which the electrical energy was determined. The specified unit identifies the rolling resistance coefficient corresponding to the road conditions of the new route, The determination unit determines the electrical energy required to travel along the new route using the rolling resistance coefficient of the road along the new route and the weight of the vehicle. The determination device according to claim 1.
  3. The acquisition unit, when a predetermined time has elapsed while the vehicle is traveling along the route on which the electrical energy was determined, determines a new route from the vehicle's current position to a predetermined distance ahead, and acquires the road conditions of the determined new route. The determination device according to claim 2.
  4. The specified part is, If the weather on the aforementioned road is sunny or cloudy, the value set as the initial value of the rolling resistance coefficient is identified as the rolling resistance coefficient of the road along the aforementioned route. If the weather on the road is neither sunny nor cloudy, the rolling resistance coefficient corresponding to the road condition is determined by referring to the data table. The determination device according to claim 1.
  5. The aforementioned determination unit, If the weight of the vehicle at the current position is obtained, the electrical energy is determined using the rolling resistance, which is determined by the product of the identified rolling resistance coefficient and the obtained weight. If the weight of the vehicle at the current position is not obtained, the electrical energy is determined using the rolling resistance, which is determined by the product of the identified rolling resistance coefficient and the value set as the initial value of the vehicle's weight. The determination device according to claim 1.
  6. The specified unit identifies a rolling resistance coefficient that is greater than the rolling resistance coefficient for wet and frozen road conditions when the road conditions are puddles and snow. The determination device according to claim 1.
  7. The acquisition unit makes the first distance, which is the predetermined distance when the vehicle's current location is included in an expressway, longer than the second distance, which is the predetermined distance when the vehicle's current location is included in an urban area. A determination device according to any one of claims 1 to 6.

Description

This invention relates to a determination device that determines the energy required for a vehicle to travel along a planned route. A technique for calculating the energy required for a vehicle to travel a route from its current location to its destination is known. Patent Document 1 discloses a technique for calculating the rolling resistance coefficient of a road traveled by a vehicle based on the energy consumed when the vehicle traveled on the road under specific conditions at an arbitrary point, and then using the calculated rolling resistance coefficient to determine the energy required for the vehicle to travel on the road it is scheduled to travel on. Japanese Patent Publication No. 2016-049922 This is a diagram showing an overview of the vehicle according to this embodiment.This is a diagram illustrating the configuration of the decision-making device.This is an example of a data table that correlates road conditions with rolling resistance coefficients.This diagram illustrates the process of determining the power requirements for a new route.This flowchart shows an example of the process for determining the required power.This flowchart shows an example of a vehicle weight determination process.This is a flowchart illustrating an example of a rolling resistance identification process. [Overview of Vehicle 100] Figure 1 is a diagram showing an overview of the vehicle 100 according to this embodiment. The vehicle 100 includes a fuel cell 110, a hydrogen tank 111, a converter 112, a secondary battery 120, a converter 121, an electrical auxiliary device 130, a converter 131, an inverter 140, a motor 141, wheels 145, and a determination device 200. The vehicle 100 is an electric vehicle that runs on a motor 141 powered by electricity from the fuel cell 110 and the secondary battery 120. The vehicle 100 is, for example, a truck for transporting cargo, but is not limited to this. The vehicle 100 has a function to determine the electrical energy required to operate the motor 141 (hereinafter referred to as "required power") when the vehicle 100 is traveling along a predetermined route, and to determine the output of the fuel cell 110 and the secondary battery 120 based on the determined required power. The fuel cell 110 generates electricity using a chemical reaction between fuel and an oxidizer. For example, the fuel cell 110 generates electricity by reacting hydrogen (the fuel) with oxygen (the oxidizer). Hydrogen stored in the hydrogen tank 111, which is connected to the fuel cell 110, is supplied to the fuel cell 110. Oxygen from the air taken in through an air intake (not shown) is supplied to the fuel cell 110. The fuel cell 110 supplies the electricity (power) generated by the reaction of hydrogen and oxygen to the motor 141 and the electrical auxiliary equipment 130. Specifically, the fuel cell 110 supplies power to the motor 141 and the electrical auxiliary equipment 130 via the converter 112. The converter 112 is installed between the fuel cell 110 and the motor 141 and electrical auxiliary equipment 130. The converter 112 is a circuit that converts the voltage value of the DC current output by the fuel cell 110 into a voltage value usable by the motor 141 and electrical auxiliary equipment 130. Specifically, the converter 112 boosts the voltage value of the DC current output by the fuel cell 110 and supplies it to the motor 141 and electrical auxiliary equipment 130. The secondary battery 120 is a battery capable of charging and discharging electricity. The secondary battery 120 is, for example, either a lithium-ion battery or a lead-acid battery, but is not limited to these; any known secondary battery can be used. The secondary battery 120 stores electricity by receiving regenerative power from the motor 141 and power output from the fuel cell 110. The secondary battery 120 supplies power to the motor 141 and the electrical auxiliary equipment 130 by discharging the stored electricity. Specifically, the secondary battery 120 supplies power to the motor 141 and the electrical auxiliary equipment 130 via the converter 121. The converter 121 is installed between the secondary battery 120 and the motor 141 and electrical auxiliary equipment 130. The converter 121 is a circuit that converts the voltage value of the DC current output by the secondary battery 120 into a voltage value usable by the motor 141 and electrical auxiliary equipment 130. Specifically, the converter 121 boosts the voltage value of the DC current output by the secondary battery 120 and supplies it to the motor 141 and electrical auxiliary equipment 130. The electrical auxiliary equipment 130 is a device mounted on the vehicle 100 and operated by electricity. The electrical auxiliary equipment 130 includes, but is not limited to, an air conditioner, lights, measuring instruments, and display devices, and includes any other power-operated device mounted on the vehicle 100. The electrical auxiliary equipment 130 is connected to