Hybrid vehicle

• US 10,131,343 B2
• Filed: 09/28/2016
• Issued: 11/20/2018
• Est. Priority Date: 10/01/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kishimoto, Takeshi, Amano, Masaya, Ando, Takashi, Shimizu, Yu, Hayakawa, Yuki
• Primary Examiner(s): Tissot, Adam D
• Application Number:
  US15/278,228
• Publication Number:
  US 20170096135A1
• Time in Patent Office: 783 Days
• Field of Search: None
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• 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 10/18 including control of braking systems
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/14 in conjunction with braking regeneration
• CPC Class Codes: B60W 20/50 Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
• CPC Class Codes: B60W 2050/0295 Inhibiting action of specific actuators or systems
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2710/0644 Engine speed
• CPC Class Codes: B60W 2710/08 Electric propulsion units
• CPC Class Codes: B60W 2710/18 Braking system
• CPC Class Codes: B60W 2710/242 for electrical energy
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2300/18125 Regenerative braking
• CPC Class Codes: B60Y 2300/43 Control of engines
• CPC Class Codes: B60Y 2300/60 : Control of electric machines, e.g. problems related to electric motors or generators
• CPC Class Codes: B60Y 2300/91 : Battery charging
• CPC Class Codes: B60Y 2400/60 : Electric Machines, e.g. motors or generators
• CPC Class Codes: B60Y 2400/61 : Arrangements of controllers for electric machines, e.g. inverters
• CPC Class Codes: B60Y 2400/73 : Planetary gearings
• CPC Class Codes: B60Y 2400/81 : Braking systems
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10S 903/906 : Motor or generator
• CPC Class Codes: Y10S 903/91 : Orbital, e.g. planetary gears
• CPC Class Codes: Y10S 903/93 : Conjoint control of different elements

Abstract

A vehicle includes an engine, an MG (motor generator) an MG2, a planetary gear device mechanically coupled to the engine and MG1 and MG2, a battery, an inverter configured to perform a power conversion between the battery and MG1 and between the battery and MG2, and a controller. MG1 generates a counter-electromotive torque when rotated by the engine. During an inverter-less running control where the inverter is put into a gate shut-off state and the engine is driven to cause MG1 to generate the counter-electromotive torque, the controller decreases a engine target rotation speed Netag when an integrated value of battery charging current (deterioration evaluation value D) is greater than a predetermined value (threshold value D1) smaller than the engine target rotation speed Netag when the deterioration evaluation value D is equal to or smaller than the threshold value D1.

Claims

1. A hybrid vehicle comprising:

an engine;

a first rotating electrical machine including a rotor provided with a permanent magnet;

an output shaft coupled to drive wheels;

a planetary gear device mechanically coupled to the engine, the first rotating electrical machine and the output shaft, and configured to transmit torque among the engine, the first rotating electrical machine and the output shaft;

a second rotating electrical machine coupled to the output shaft;

a battery;

an inverter configured to perform a power conversion between the battery and the first rotating electrical machine and between the battery and the second rotating electrical machine; and

a controller configured to perform an inverter-less running control when at least one of the first rotating electrical machine and the second rotating electrical machine is not normally driven by the inverter, the inverter-less running control being such a control that the inverter is brought into a gate shut-off state, and the engine is driven to cause the first rotating electrical machine to generate a braking torque due to a counter-electromotive voltage generated by the first rotating electrical machine, and thereby the vehicle is caused to run with a torque which acts on the output shaft as a counterforce of the braking torque, and

during the inverter-less running control, the controller being configured to;

(i) when an integrated value of battery charging current is equal to or less than a predetermined value, control a rotation speed of the engine to be a first engine rotation speed; and

(ii) when the integrated value of battery charging current is greater than the predetermined value, control the rotation speed of the engine to be a second engine rotation speed which is smaller than the first engine rotation speed.