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vehicle ride control

A driving control and vehicle technology, applied in electrical control, engine control, road transportation, etc., can solve the problems of deterioration of emissions, unoptimized fuel utilization, reduction, etc., to prevent deterioration of fuel utilization, and ensure the opportunity to perform idle learning. , the effect of improving fuel efficiency

Inactive Publication Date: 2017-04-12
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during coasting, idling learning can be performed by performing neutral coasting, but since neutral coasting is accompanied by fuel supply to the engine, it is not preferable from the viewpoint of fuel efficiency.
In addition, even when driving in a state where the deceleration learning has not been completed, there is a possibility that problems such as deterioration of emissions may occur.
On the other hand, if coasting is not performed until all learning is completed, the reduction in fuel efficiency achieved by coasting cannot be achieved.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] figure 1 It is a schematic configuration diagram showing a main part of a control system together with a skeleton diagram of a vehicle drive device 10 to which the present invention is suitably applied. The vehicle driving device 10 includes an internal combustion engine such as a gasoline engine or a diesel engine that generates power by burning fuel as a driving force source, that is, an engine 12 having a plurality of cylinders 11, and the output of the engine 12 is transmitted from an automatic transmission 16 through a differential gear unit 18. To the left and right wheels 20. Between the engine 12 and the automatic transmission 16, a power transmission device such as a vibration damper and a torque converter is provided, but a motor generator functioning as a driving force source may also be provided.

[0030] The engine 12 includes an engine control device 30 having various devices necessary for output control of the engine 12 such as an electronic throttle and...

Embodiment 2

[0066] In this embodiment, the driver's seat is provided with a coasting mode changeover switch capable of selectively switching the coasting mode, so that the driver can selectively switch to the coasting mode during coasting. For example, a cylinder stop coasting switch, a neutral coasting switch, and a free running coasting switch are provided on the driver's seat, and the driver can switch to any coasting by pressing the switches. And, when none of the switches is selected, engine braking travel is selected.

[0067] In this way, in the case where the driver can selectively switch the inertial travel, the travel mode switching control unit 86 is configured so that, when the idling learning is not completed, even if the driver selects, for example, a neutral inertial travel such as a cylinder deactivated inertial travel In the case of coasting other than coasting, it is also switched to neutral coasting. By setting in this way, when idling learning is not completed, an opp...

Embodiment 3

[0072] In the present embodiment, also in the same manner as in the second embodiment described above, the driver's seat is provided with a coasting mode switching switch capable of selectively switching the coasting mode, so that the driver can selectively switch to the coasting mode during coasting. For example, a cylinder stop coasting switch, a neutral coasting switch, and a free running coasting switch are provided on the driver's seat, and the driver can switch to any coasting by pressing the switches. And, when none of the switches is selected, engine braking travel is selected.

[0073] In this way, when the driver can selectively switch the coasting running, the running mode switching control unit 86 is configured so that when the deceleration learning is not completed, even if the driver selects the coasting running (idle running) In the case of coasting with gears or coasting with free running), it also switches to coasting with cylinder deactivation or engine braki...

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Abstract

The present invention provides a travel control device for a vehicle capable of securing an opportunity for idling learning and improving fuel efficiency in a vehicle capable of performing neutral coasting. When the idling learning is not completed, the driving area where the neutral coasting is performed increases in the running area where the coasting is performed compared to after the idling learning is completed. Therefore, during coasting, the region where the engine (12) is in an idling state is enlarged, and an opportunity to perform idling learning can be ensured. Therefore, it is possible to end idling learning early, and it is possible to prevent deterioration of fuel efficiency and emission due to incomplete idling learning. After idling learning is completed, since the operating range for neutral coasting does not increase, the operating range for other coasting without fuel injection, such as cylinder deactivation coasting, becomes larger, and fuel efficiency can be improved.

Description

technical field [0001] The present invention relates to a running control device of a vehicle, in particular to control during inertial running. Background technique [0002] With respect to the well-known engine braking travel (fuel stop coasting travel), in which the engine brake is enabled by the driven rotation of the engine while maintaining the power transmission path between the engine and the wheels, in order to extend the It is considered that the vehicle is coasting in which the engine braking force is reduced compared with the engine braking traveling, which contributes to the improvement of the fuel economy due to the traveling distance. The device described in Patent Document 1 is an example, and describes a control device that, for example, performs neutral coasting or free-running coasting to eliminate engine braking and extend the travel distance, thereby contributing to improvement in fuel efficiency. , in the neutral coasting running, the power transmissio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D45/00F02D13/06F02D29/00
CPCF02D13/06F02D29/02F02D41/0087F02D41/022F02D41/0295F02D41/123F02D41/2441F02D31/003B60W30/18072B60W2710/0677B60W10/02B60W10/06Y02T10/12Y02T10/60B60W30/18B60W2710/02B60W2710/06
Inventor 平井琢也黑木錬太郎光安正记金种甲松永昌树木户康成铃木健明小暮隆行冈村由香里佐藤彰洋木下裕介
Owner TOYOTA JIDOSHA KK