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Mode change control system for hybrid vehcile

A hybrid vehicle, mode switching technology, applied in hybrid vehicles, power units, control devices, etc., can solve the problems of reduced fuel economy improvement effect and deterioration of energy recovery performance.

Active Publication Date: 2008-04-16
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] An object of the present invention is to provide a mode switching control device for a hybrid vehicle that solves the problem of deterioration in energy recovery performance (fuel economy) by allowing EV running mode to be selected even in the state of battery charge in which HEV running mode is selected. reduction in lifting effect) related issues

Method used

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  • Mode change control system for hybrid vehcile
  • Mode change control system for hybrid vehcile
  • Mode change control system for hybrid vehcile

Examples

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described in detail based on Examples shown in the drawings.

[0029] Figure 1 also shows the wheel drive system (power train) and its control system in the hybrid vehicle with the mode switching control device of the present invention, the symbol 1 is the motor / generator as the first power source, and the symbol 2 is Reference numerals 3L and 3R denote left and right drive wheels (left and right rear wheels) for an engine as a second power source, respectively.

[0030] In the power train of the hybrid vehicle shown in FIG. 1 , like a normal rear-wheel drive vehicle, an automatic transmission 4 is arranged in series behind the engine 2 in the vehicle front-rear direction, and an electric motor / generator is provided in combination with a shaft 5. The shaft 5 transmits the rotation from the engine 2 (crankshaft 2 a ) to the input shaft 4 a of the automatic transmission 4 .

[0031] The motor / generator 1 is an AC ...

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Abstract

The invention relates to a mode switching control device for a hybrid vehicle, which can switch the HEV mode into the EV mode during the regenerative braking running based on the high energy recycling efficiency. The invention is characterized in that during the vehicle drives under an EV mode, the battery charge state SOC becomes smaller than the SOC (L) at a time t 0, as a result, the EV mode is switched into the HEV mode; after time t 1, deceleration is desired, and an accelerator opening APO is kept at 0; at time t 3, the SOC increases and becomes greater than or equal to a SOC (H) by theHEV mode; in this case, after time t 1 of release of an accelerator pedal, the SOC (H) is cleared at time t 2 at which a vehicle operating condition is judged to be a low load drive condition in which a motor / generator performs regenerative braking; and by making a judgment of switching the HEV mode into the EV mode change based on the SOC(L) instead of the SOC(H), the HEV mode is switched into the EV mode. The regenerative braking time with the engine dragged is therefore shortened, and the regenerative braking time with no-engine drag can be correspondingly lengthened, thereby improving theenergy recovery performance.

Description

technical field [0001] The present invention relates to a driving mode switching control device of a hybrid vehicle, in particular to a mode switching control device for switching from a hybrid driving (HEV) mode to an electric driving (EV) mode of a hybrid vehicle. The power vehicle has an engine and a motor / generator as a power source, and a first clutch capable of changing the transmission torque capacity is installed between the above-mentioned engine and the motor / generator. In the wheel drive system from the motor / generator to the drive wheels, insert Equipped with a second clutch that can change the transfer torque capacity, the hybrid vehicle can select between an electric driving (EV) mode and a hybrid driving (HEV) mode. The electric driving (EV) mode stops the engine, and the first clutch Engage the second clutch while disengaging, and use only the power from the motor / generator to run. The hybrid driving (HEV) mode is to use at least the power from the engine by si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/00B60K6/48B60K6/547B60L7/16B60L50/16B60W10/02B60W10/06B60W10/08B60W10/26
CPCY02T10/6286B60W2540/10B60W10/06B60W10/02B60K6/48Y10S903/947Y02T10/7005B60W20/00Y10S903/907B60W10/26Y02T10/92B60W10/08Y02T10/6221Y02T10/52B60L7/14B60L15/20B60L15/2009B60L2210/40B60L2220/14B60L2240/12B60L2240/423B60L2240/443B60L2240/507B60L2250/26B60L2260/26Y02T10/70B60L50/16B60L58/16B60L58/15Y02T10/62Y02T10/64Y02T10/7072Y02T10/72B60W20/13
Inventor 林伸树上野宗利
Owner NISSAN MOTOR CO LTD
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