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Internal combustion engine control apparatus

A technology for control devices and internal combustion engines, applied in engine control, fuel injection control, internal combustion piston engines, etc., can solve problems such as insufficient torque, poor acceleration, and inability to further increase internal combustion engine torque, so as to avoid insufficient torque and prevent Accelerate Bad Effects

Inactive Publication Date: 2014-09-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, when the actual torque of the internal combustion engine reaches TQreq' where the EGR opening is controlled to be greater than EGRreq' of EGRreq, the intake air is saturated due to the introduction of a large amount of EGR gas, and the torque of the internal combustion engine cannot be further increased
As a result, the amount of torque obtained by subtracting TQreq' from TQreq is insufficient, resulting in poor acceleration.

Method used

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  • Internal combustion engine control apparatus
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0054] [Structure of HV system]

[0055] figure 1 It is a diagram showing a schematic configuration of a drive system 10 of a hybrid vehicle to which the present invention is applied. The drive system 10 includes an internal combustion engine 12 and a vehicle drive motor (hereinafter simply referred to as “motor”) 14 as a second power source of the vehicle. Further, the drive system 10 includes a generator 16 that generates electric power upon receiving supply of driving force. The internal combustion engine 12 , the motor 14 , and the generator 16 are connected to each other via a planetary gear-type power distribution mechanism 18 . A speed reducer 20 is connected to a rotating shaft of the motor 14 connected to the power distribution mechanism 18 . The speed reducer 20 connects the rotation shaft of the motor 14 to a drive shaft 24 , wherein the drive shaft 24 is connected to a drive wheel 22 . The power split mechanism 18 is a device that splits the driving force of t...

Embodiment approach 2

[0089]Second, refer to Figure 6 and Figure 7 Embodiment 2 of the present invention will be described.

[0090] The system of this embodiment can adopt figure 1 and figure 2 Shown hardware structure, and make ECU 40 carry out the Figure 7 shown in the program to replace the Figure 5 shown in the program to achieve.

[0091] Figure 6 It is a diagram for explaining the characteristic setting of the required throttle opening TAreq according to Embodiment 2 of the present invention.

[0092] In the above-mentioned first embodiment, in order to avoid insufficient torque due to the influence of a large amount of EGR gas during acceleration, in the setting region where it can be judged that the current request is accompanied by an increase in the required torque, the required throttle opening is reduced. In the case of the requested torque, the actual torque of the internal combustion engine 12 is limited to the current torque TQreq with the requested EGR opening EGRreq ...

Embodiment approach 3

[0106] Second, refer to Figure 8 and Figure 9 Embodiment 3 of the present invention will be described.

[0107] The system of this embodiment can adopt figure 1 and figure 2 Shown hardware structure, and make ECU 40 carry out the Figure 9 shown in the program to replace the Figure 7 shown in the program to achieve.

[0108] Figure 8 It is a diagram for explaining characteristic control during acceleration according to Embodiment 3 of the present invention.

[0109] Also in the present embodiment, as in the second embodiment described above, when the requested torque TQreq larger than the requested torque TQtamax at the time of the maximum throttle opening TAmax is requested in the EGR region, the requested throttle opening is fixed at Maximum throttle opening TAmax. Hereinafter, the section in which the throttle opening is required to be fixed at the maximum throttle opening TAmax will be referred to as a "required throttle opening fixed section".

[0110] In t...

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Abstract

Provided is a control device for an internal combustion engine capable of avoiding insufficient torque due to the influence of EGR gas when the torque of the internal combustion engine rises toward the required torque, and satisfactorily preventing poor acceleration. The requested throttle opening (TAreq) is set based on the requested torque (TQreq) based on the requested throttle opening map that specifies the relationship between the requested torque (TQreq) and the requested throttle opening (TAreq). The requested EGR opening (EGRreq) is set based on the requested load ratio (KLreq) according to the requested EGR opening map that defines the relationship between the requested load ratio (KLreq) and the requested EGR opening (EGRreq). Limiting the actual torque of the internal combustion engine (12) to the current request with the requested EGR opening (EGRreq) acquired based on the requested EGR opening map and the requested load rate (KLreq) relative to the current requested torque (TQreq) as an upper limit Requested EGR opening (EGRreq) during torque (TQreq) transition.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] Conventionally, for example, Patent Document 1 discloses a control device for an internal combustion engine for a hybrid vehicle including an internal combustion engine and a motor as power sources. In this conventional control device, the final intake air amount used for the intake air amount control based on the accelerator depression amount is calculated after detecting the required torque required by the internal combustion engine based on the accelerator depression amount. Furthermore, the throttle opening is adjusted so that the actual intake air amount detected using the air flow meter coincides with the above-mentioned final intake air amount. [0003] In addition, as far as the applicant knows, as technical documents related to the present invention, there are also documents described below including the above-mentioned documents. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D21/08F02D41/10
CPCF02D2041/0017F02D41/0002F02D41/10F02D2250/21Y02T10/47F02D41/0055F02D11/105F02D2250/18F02D35/023F02D41/005Y02T10/42Y02T10/40
Inventor 北东宏之
Owner TOYOTA JIDOSHA KK
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