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vehicle control device

A vehicle control device and vehicle technology, which are applied in electrical control, engine control, transmission control and other directions, and can solve problems such as changes in engine rotation speed

Active Publication Date: 2019-09-27
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, since the vehicle travels by inertia, the estimated engine rotation speed calculated based on the estimated gear position does not change like the actually measured engine rotation speed
Thus, a discrepancy occurs between the measured engine rotational speed and the estimated engine rotational speed

Method used

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Experimental program
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Embodiment approach 1

[0026] exist figure 1 In the illustrated vehicle 10 , the engine 11 is an internal combustion engine driven by combustion of fuel, and is appropriately equipped with a fuel injection valve, an ignition device, and the like as known.

[0027] A transmission 17 is connected to the engine output shaft 12 via a clutch device 16 as a power transmission mechanism. The clutch device 16 is a friction clutch and includes a set of clutch mechanisms having a disc (flywheel, etc.) connected to the engine output shaft 12 on the engine 11 side, and a transmission 17 connected to the transmission input shaft 21. Side discs (clutch discs, etc.). When the two disks contact each other in the clutch device 16, a power transmission state (clutch connection state) in which power is transmitted between the engine 11 and the speed changer 17 is established; The power cut-off state (clutch cut-off state) in which the power transmission is cut off. In addition, a structure in which the clutch devic...

Embodiment approach 2

[0060] In the first embodiment described above, when it is determined based on the rotation variation ΔNEA that is the difference between the engine rotation speed NE1 and the deactivation rotation speed NE2 that a steep change gradient of the engine rotation speed NE1 has occurred, It is determined that a gear change has been made. On the other hand, in the present embodiment, the presence or absence of gear change is determined based on the occurrence of a change gradient greater than or equal to a predetermined gradient in the engine rotational speed NE1 and the subsequent occurrence of an increase or decrease in the engine rotational speed NE1 within a predetermined period. .

[0061] In addition, when it is determined that the gear has been changed, the difference between the engine rotational speed NE1 before and after the gear change is calculated as the rotational speed change ΔNEB, and based on the rotational speed change ΔNEB, it is determined whether the shift stage...

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Abstract

A vehicle control device applied to a vehicle 10, which comprises an engine 11, a gear-changing transmission 17 for selectively switching gears, and a clutch device 16 for transmitting and cutting off motive power between the engine 11 and the transmission 17, acquires information detected by a rotational speed sensor 44, calculates the engine speed on the basis of this detected information, and determines whether or not to change gears on the basis of a change gradient of at least a prescribed gradient produced in the calculated engine speed.

Description

technical field [0001] The present invention relates to a vehicle control device used in a vehicle equipped with a transmission. Background technique [0002] For example, in a vehicle equipped with a manual transmission mechanism that switches gears manually by the driver, it is known to calculate the gear ratio from the measured engine rotation speed and wheel speed, and compare the calculated gear ratio with the gear position. A technology to determine the connection state of the clutch. When using this technology, it is necessary to install a gear position sensor for detecting the actual selected gear position in addition to sensors for detecting the engine rotation speed and wheel speed, which brings about a problem of cost increase. [0003] In order to solve the above-mentioned problems, the vehicle control device disclosed in Patent Document 1 omits a sensor for detecting the position of a gear, and determines disengagement of a clutch. Specifically, since the whee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/42F02D45/00
Inventor 伊藤慎一小薮忠胜竹添浩行
Owner DENSO CORP