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Control device for controlling automatic engine stop and start

一种发动机停止、控制设备的技术，应用在发动机控制、发动机的起动、发动机用电动机起动等方向，能够解决没有公开和建议、未公开和建议、检测和确定小齿轮与环形齿轮最佳时间等问题

Active Publication Date: 2011-07-27
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the conventional techniques disclosed in JP2005-330813 and JP2002-70699 only show the meshing between the pinion gear and the ring gear when they are synchronized with each other, but do not disclose and suggest any technique for detecting and determining that the pinion gear and the ring gear are meshed with each other. Best time for ring gears to mesh smoothly and accurately
That is, the conventional art does not disclose and suggest any technique to detect and determine the optimum time when the pinion gear meshes with the ring gear

Method used

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  • Control device for controlling automatic engine stop and start
  • Control device for controlling automatic engine stop and start
  • Control device for controlling automatic engine stop and start

Examples

Experimental program
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Effect test

no. 1 example

[0047] refer to Figure 1 to Figure 6 , the engine control device according to the first embodiment of the present invention will be described.

[0048] figure 1 is a schematic configuration of the control device 10 capable of executing an automatic engine stop and start sequence according to the first embodiment of the present invention.

[0049] now refer to figure 1 A schematic configuration of an engine start control system will be described.

[0050] The starter 11 has a mechanism that pushes the pinion to the ring gear when the internal combustion engine 21 starts. The ring gear is fixed to the crankshaft of the internal combustion engine 21 . The starter 11 includes a starter motor 12 , a pinion 13 and an electromagnetic actuator 14 . The pinion 13 is driven by the starter motor 12 . When the starter 11 starts the internal combustion engine 21 , the electromagnetic actuator 14 pushes the pinion 13 so that the pinion 13 meshes with the ring gear 23 .

[0051] Th...

no. 2 example

[0143] refer to Figure 7-8 , to describe the control device according to the second embodiment of the present invention.

[0144] The differences between the second embodiment and the first embodiment will be described below.

[0145] Figure 7 is a timing chart showing engine restart control executed by the ECU 20 in the control device according to the second embodiment of the present invention. Figure 8 is a flowchart showing the execution of the engine restart control routine by the ECU 20 in the control device according to the second embodiment.

[0146] ECU20 execution Figure 8 The engine restart control program shown. ECU 20 in the control device according to the second embodiment executes fourth engine restart control when no engine restart request occurs and current rotation speed Ne of internal combustion engine 21 falls toward fourth rotation speed N4 and finally reaches fourth rotation speed N4. This fourth rotational speed N4 is a value (for example, 100 rp...

no. 3 example

[0169] will refer to Figure 10 and Figure 11 A control device according to a third embodiment of the present invention will be described. The difference between the third embodiment and the first embodiment will be described below.

[0170] Figure 10 is a timing chart showing engine restart control executed by the ECU 20 in the control device according to the third embodiment of the present invention. Figure 11 is a flowchart showing an engine restart control routine executed by the ECU 20 in the control device according to the third embodiment.

[0171] Such as Figure 10 As shown in the timing chart of , when the current rotational speed Ne of the internal combustion engine 21 is in the rotational speed reserve range (N1≥Ne>N2), and when an engine restart request occurs and the rotational speed of the internal combustion engine drops due to the automatic engine stop of the internal combustion engine 21, The ECU 20 in the control device according to the third embodim...

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PUM

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Abstract

The present invention discloses a control device for controlling automatic engine stop and start. The control device performs fuel injection without cranking when engine-speed Ne is within a first-range (Ne>N1) and an engine-restart request occurs. The device performs the cranking after the synchronization in rotation-speed between pinion and ring gears, and the gear meshing operation between them when the engine-speed Ne is within a second range (N1>=Ne>N2) and the engine-restart request occurs. The device performs the cranking after the gear meshing operation and drives a starter to rotate the pinion gear when the engine-speed Ne is within a third-range (N3>=Ne) and the above request occurs. When the above request occurs in an engine restart ready-range (N2>=Ne>N3), the control device performs the cranking after the engine-speed Ne is decreased to a value within the third-range (N3>=Ne) and after the completion of the gear meshing operation.

Description

technical field [0001] The invention relates to a control device for controlling automatic engine stopping and starting. The control device is capable of automatically stopping the internal combustion engine of the vehicle when receiving an automatic engine stop request and automatically restarting (restarting) the internal combustion engine when receiving an engine restart request. Background technique [0002] In order to improve fuel consumption and reduce exhaust emissions, there is a recent trend to install on vehicles automatic engine control systems capable of automatically stopping and starting the internal combustion engine of the vehicle. Such an automatic engine control system is called an "engine idle stop control system". When the driver wants to stop, the engine idle stop control system can automatically stop the engine, when the driver of the vehicle operates various components to restart the engine, for example, when the driver of the vehicle depresses the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00F02D41/30F02D41/06
CPCF02N11/0844F02N11/0859F02N11/0855F02N2300/2006F02N11/0818F02N2200/022Y02T10/48F02N99/006Y02T10/40
Inventor 奥本和成能谷英弥藤田达也山口芳范
Owner DENSO CORP