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Hybrid vehicle and travel mode setting method of hybrid vehicle

  • US 10,315,641 B2
  • Filed: 05/26/2009
  • Issued: 06/11/2019
  • Est. Priority Date: 05/26/2009
  • Status: Expired due to Fees
First Claim
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1. A hybrid vehicle, having an internal combustion engine capable of outputting power for driving the hybrid vehicle, a motor constructed to input and output power for driving the hybrid vehicle, a secondary battery designed to transmit electric power to and receive electric power from the motor, and a charger connected to an external power supply in a system shutdown state of the hybrid vehicle to charge the secondary battery with electric power from the external power supply, the hybrid vehicle being capable of motor travel where the hybrid vehicle is driven only with input and output power to and from the motor and hybrid travel where the hybrid vehicle is driven with output power from the internal combustion engine and with the input and output power to and from the motor, the hybrid vehicle comprising:

  • an accumulated charge ratio calculation module configured to calculate an accumulated charge ratio that is a ratio of an accumulated charge amount in the secondary battery to a whole capacity of the secondary battery;

    a travel mode setting module configured to;

    receive an ignition signal from an ignition switch in order to determine whether the hybrid vehicle is at a state after system shutdown or at system startup,set, prior to a most recent system shutdown, a hybrid travel shift flag to a first value when an accumulated charge ratio is less than a second preset ratio and set, during the most recent system shutdown, the hybrid travel shift flag to a second value when charging of the charger is performed,at system startup, the following options are available;

    (A) a motor travel priority mode where the motor travel is prioritized for driving the hybrid vehicle as a travel mode if the calculated accumulated charge ratio is more than or equal to a first preset ratio at system startup of the hybrid vehicle and a determination of a charge record of the secondary battery by the charger is affirmative during the most recent system shutdown and prior to the most recent system startup of the hybrid vehicle,(B) a hybrid travel priority mode where the hybrid travel is prioritized for driving the hybrid vehicle as the travel mode if the calculated accumulated charge ratio is less than the first preset ratio at the system startup of the hybrid vehicle and the determination of the charge record of the secondary battery by the charger is affirmative during the most recent system shutdown and prior to the most recent system startup of the hybrid vehicle,(C) the motor travel priority mode as the travel mode at the system startup of the hybrid vehicle if the determination of the charge record of the secondary battery by the charger is negative during the most recent system shutdown and prior to the most recent system startup of the hybrid vehicle and the hybrid travel shift flag is the second value, and(D) the hybrid travel priority mode as the travel mode regardless of the calculated accumulated charge ratio at the system startup of the hybrid vehicle if the determination of the charge record of the secondary battery by the charger is negative during the most recent system shutdown and prior to the most recent system startup of the hybrid vehicle and the hybrid travel shift flag is the first value; and

    select, at the system startup, one of the options (A), (B), (C), or (D), and set the selected option as the travel priority mode,set, after the system startup, the hybrid travel priority mode as the travel mode when the accumulated charge ratio is less than the second preset ratio while the hybrid vehicle is driven in the motor travel priority mode, wherein the second preset ratio is less than the first preset ratio, anda control module configured to control the internal combustion engine and the motor so that the hybrid vehicle is driven in the set travel mode.

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