Control apparatus for hybrid vehicle

• US 20050000481A1
• Filed: 07/01/2004
• Published: 01/06/2005
• Est. Priority Date: 07/04/2003
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Suzuki, Minoru, Hanada, Kohei, Wakashiro, Teruo, Asakawa, Masanobu, Niki, Manabu
• Granted Patent: US 7,146,958 B2
• Time in Patent Office: Days
• US Class Current: 123/179.160
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 2240/445 Temperature
• 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 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2510/0614 Position of fuel or air injector
• CPC Class Codes: B60W 2510/0676 Engine temperature
• CPC Class Codes: F02D 2041/2031 Control of the current by means of delays or monostable multivibrators
• CPC Class Codes: F02D 2200/023 Temperature of lubricating oil or working fluid
• CPC Class Codes: F02D 41/061 the corrections being time dependent
• CPC Class Codes: F02D 41/062 for starting F02D41/061 takes precedence
• CPC Class Codes: F02D 41/086 taking into account the temperature of the engine
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

An object is to improve fuel consumption efficiency. Accordingly, a fuel gradual addition delay time when starting (engine water temperature) TMKSTDLYT which changes in a decreasing trend with an increase in the engine water temperature is set (step S10). A fuel gradual addition delay time when starting (state of charge) TMKSTDLYQ which changes in an increasing trend with an increase in the state of charge QBAT is set (step S12 and S14). A fuel gradual addition delay time when starting (vehicle speed) TMKSTDLYV which changes in a decreasing trend with an increase in vehicle speed VP is set (step S13 and S15). Then the greatest value of; the fuel gradual addition delay time when starting (engine water temperature) TMKSTDLYT, the fuel gradual addition delay time when starting (state of charge) TMKSTDLYQ, and the fuel gradual addition delay time when starting (vehicle speed) TMKSTDLYV is set as a fuel gradual addition delay time when starting TMKSTDLY (step S16).

Claims

1. A control apparatus for a hybrid vehicle which includes an internal-combustion engine and a motor as a power source, and a power storage unit which transfers electric energy between it and the motor, and connects at least one of said internal-combustion engine and said motor to driving wheels of the vehicle through a transmission so as to transmit a driving force to said driving wheels, comprising:

a fuel supply canceling device which automatically cancels fuel supply to said internal-combustion engine according to an operating state of the vehicle;

a starting state determining device which determines, when starting said internal-combustion engine, whether or not it is restart of said internal-combustion engine in which fuel supply is restarted from a fuel supply canceling state by said fuel supply canceling device; and

a fuel supply start timing setting device which sets a timing to start fuel supply to said internal-combustion engine based on a determination by said starting state determining device, a traveling state of the vehicle, and a state of charge of said power storage unit.

2. A control apparatus for a hybrid vehicle according to claim 1, wherein said fuel supply start timing setting device sets the timing to start fuel supply to said internal-combustion engine based on an engine water temperature, the determination by said starting state determining device, the state of charge of said power storage unit, and a vehicle speed.

3. A control apparatus for a hybrid vehicle according to claim 2, wherein fuel supply delay times are set based respectively on the engine water temperature, the state of charge of said power storage unit, and the vehicle speed, and the greatest value of the fuel supply delay times is set as the timing to start fuel supply to said internal-combustion engine.

4. A control apparatus for a hybrid vehicle according to claim 3, further comprising tables of fuel supply delay times based respectively on the engine water temperature, the state of charge of said power storage unit, and the vehicle speed, wherein the tables of fuel supply delay times are retrieved to set the fuel supply delay times based on the engine water temperature, the state of charge of said power storage unit, and the vehicle speed.

5. A control apparatus for a hybrid vehicle according to 4, wherein different tables of fuel supply delay times are used for setting the fuel supply delay times based on the state of charge of said power storage unit, and the vehicle speed, depending on the determination by said starting state determining device.