Control device for hybrid vehicle and control method therefor

a control device and hybrid vehicle technology, applied in the direction of gas pressure propulsion mounting, reciprocating piston engines, dispersed particle filtration, etc., can solve the problems of increased back pressure in the exhaust gas, clogging of filters, and inability to run without emitting exhaust gas, so as to improve the driveability or fuel the purification capacity of the exhaust gas purification device is regenerated, and the effect of improving the efficiency of the hybrid vehicl

Inactive Publication Date: 2010-03-11
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]The present invention provides for a process of charging a battery and a process of regenerating the purification capacity of an exhaust gas purifying device to be performed more efficiently in a hybrid vehicle that runs using an internal combustion engine in conjunction or combination with an electric motor to improve the driveability or the fuel efficiency of the hybrid vehicle.

Problems solved by technology

However, even the hybrid vehicles cannot run without emitting exhaust gas derived from the operation of the internal combustion engine, and require an exhaust gas purifying device for purifying the exhaust gas from the internal combustion engine.
As for the filter, when a large amount of collected particulate matter (PM) is accumulated, the filter is clogged and the back pressure in the exhaust gas is increased to the extent that the engine performance is reduced.
Therefore, every time any of the above processes is performed, the driveability and the fuel efficiency of the hybrid vehicle as a system may deteriorate.

Method used

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  • Control device for hybrid vehicle and control method therefor
  • Control device for hybrid vehicle and control method therefor
  • Control device for hybrid vehicle and control method therefor

Examples

Experimental program
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Effect test

first embodiment

[0043]FIG. 2 shows a flowchart of a first battery charging routine 1 in the The first battery charging routine 1 is a program stored in the ROM of the ECU 20, and is executed at predetermined intervals by the ECU 20 when the power switch of the hybrid vehicle is ON.

[0044]When the first battery charging routine 1 is started, it is first determined whether a request to charge the battery 7 has been issued in step S101. Here, the presence or absence of a request to charge the battery 7 is determined based on whether a battery charge request flag is ON. The battery charge request flag is set to ON when an output from the charge amount sensor 15 is read into the ECU 20 and the amount of charge is equal to or less than, for example, 50% of the maximum amount of charge (the value 50% as a threshold is hereinafter referred to as “threshold charge amount”). If it is determined that a battery charge request has not been issued here, the first battery charging routine 1 is then ended. If it i...

second embodiment

[0078]In the second embodiment, the threshold charge amount as a criterion to determine whether to issue a battery charge request may be also increased before determining the presence or absence of a battery charge request.

[0079]FIG. 5 shows a flowchart of a second PM regenerating routine 2 in the above case. In this routine, step S401 is inserted before step S303. In step S401, the threshold charge amount, used to determine whether to issue a battery charge request (to set the battery charge request flag to ON), is increased. For example, the threshold charge amount is increased from 50% shown in the first embodiment to 60%.

[0080]Then, a state in which a battery charge request is more likely to be issued can be established, and the probability that a PM regenerating process and a battery charging process can be simultaneously performed is increased. As a result, the driveability and the fuel efficiency of the engine 1 can be improved more reliably.

[0081]In the second embodiment, wh...

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Abstract

In a hybrid vehicle that includes an internal combustion engine (1) in conjunction with an electric motor (2), when one of a process of regenerating the purification capacity of an exhaust gas purifying device (10) and a process of charging a battery (7) is performed (S102), the presence or absence of a request to perform the other process is determined (S103) so that the two processes may be performed as simultaneously as possible to reduce deterioration in driveability and in the fuel efficiency as much as possible.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a control device for a hybrid vehicle and a control method therefor, and, more particularly, to a control device for regenerating the purification capacity of an exhaust gas purifying device and for charging a battery, and a control method therefor.[0003]2. Description of the Related Art[0004]In recent years, hybrid vehicles which have an internal combustion engine combined with an electric motor and runs on the output power from the internal combustion engine in conjunction or combination with the output power from the electric motor are in practical use. In such hybrid vehicles, the internal combustion engine is operated intermittently as needed and is selectively operable in high-efficiency operating ranges. Therefore, the hybrid vehicles have advantages in terms of fuel efficiency and exhaust gas purification performance as compared with vehicles, which run on only the output power f...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F19/00F01N3/023F01N9/00F02D43/00F02B73/00B01D46/42B01D53/94B60K6/445B60L50/16B60W10/00B60W10/06B60W10/08B60W10/26B60W20/00F01N3/20F02D29/02F02D29/06
CPCB60K6/48B60Y2300/476B60L11/123B60L11/14B60L11/1861B60L2270/12B60W10/06B60W10/08B60W10/26B60W20/00F02D41/0245F02D41/0275F02D41/028F02D41/029F02D2041/026Y02T10/54Y02T10/6217Y02T10/6221Y02T10/6286Y02T10/7005Y02T10/7044Y02T10/705Y02T10/7077Y02T10/26B60L7/14B60L50/61B60L50/16Y02T10/12Y02T10/40Y02T10/62Y02T10/70Y02T10/7072B60W20/15
Inventor OGISO, MAKOTO
Owner TOYOTA JIDOSHA KK
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