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Control devices for internal combustion engines

A technology of a control device and an internal combustion engine, which is applied in the direction of engine control, internal combustion piston engine, electrical control, etc., can solve the problems of prolonged engine torque time, increased power consumption, and insufficient pressure ratio of turbo compressors.

Active Publication Date: 2019-11-01
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the situation where the difference between the actual intake flow rate and the target intake flow rate is confirmed, as in the technology described in Patent Document 1, the electric compressor is always used to assist the air flow rate corresponding to the difference. , there is concern that even if the responsiveness of the engine torque (acceleration responsiveness of the vehicle) can be improved, the power consumption will increase
[0009] On the other hand, if the rotational speed of the turbo compressor is at a low rotational speed when the throttle valve is opened upon receipt of a torque increase request, there is a possibility that the intake air flow rate increases due to the opening of the throttle valve. Make the pressure ratio (= outlet pressure / inlet pressure) of the turbo compressor less than 1
As a result, the time required to achieve the requested engine torque is extended

Method used

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  • Control devices for internal combustion engines
  • Control devices for internal combustion engines
  • Control devices for internal combustion engines

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Embodiment approach 1

[0049] [System Configuration of Embodiment 1]

[0050] figure 1 It is a figure for schematically explaining the system structure of Embodiment 1 of this invention. figure 1 The illustrated internal combustion engine 10 has an internal combustion engine body 12 . As an example, the internal combustion engine 10 is a four-stroke inline four-cylinder type spark ignition engine (for example, a gasoline engine), which is mounted on a vehicle as a power unit thereof. The intake passage 14 and the exhaust passage 16 communicate with each cylinder of the internal combustion engine main body 12 .

[0051] The intake passage 14 has a first intake passage 14a through which air to be sucked into each cylinder of the internal combustion engine 10 flows. An air cleaner 18 is provided near the inlet of the first intake passage 14a. Attached to the air cleaner 18 are an air flow meter 20 that outputs a signal corresponding to the flow rate (mass flow rate) of intake air flowing through th...

Embodiment approach 2

[0102] Next, refer to Figure 8 ~ Figure 10 , Embodiment 2 of the present invention will be described. In the following description, as an example of the system configuration of Embodiment 2, reference figure 1 The system structure that has been discussed.

[0103] [Control of Embodiment 2]

[0104] (Summary of control in Embodiment 2)

[0105] Figure 8 It is a figure for explaining the air supply operation in Embodiment 2 of this invention, and shows the compressor map of the turbo compressor 22a.

[0106] According to the air supply operation of Embodiment 1 described above, the flow rate of the air supplied by the electric compressor 28a is set to the auxiliary air flow rate C (=Am-B0), so that the electric compressor 28a ensures the air flow rate from the natural air intake area to the auxiliary air flow rate. The turbocompressor 22a does not function as a throttling device at the time of a torque increase request in the supercharging region, and the minimum necessar...

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Abstract

The present invention relates to a control device of an internal combustion engine. In the internal combustion engine in which the turbo compressor of the turbocharger and the electric compressor are arranged in parallel in the intake passage, when a torque increase request to increase the engine torque is made, it is possible to suppress the electric power of the electric compressor. Consume and improve the responsiveness of engine torque. When a torque increase request to increase the engine torque is made, it is predicted that the pressure ratio of the turbo compressor (22a) is less than 1 when the throttle valve (34) is opened in response to the torque increase request Next, the air supply operation is performed using the electric compressor (28a), while the air supply operation is not performed when it is predicted that the pressure ratio will not be less than 1 even if the throttle valve (34) is opened.

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine, and more particularly to a control device for an internal combustion engine suitable as a device for controlling an internal combustion engine in which a turbo compressor and an electric compressor of a turbocharger are arranged in parallel on an intake air in the passage. Background technique [0002] Patent Document 1 discloses a supercharging system including a turbocharger and an electric compressor arranged in parallel in an intake passage of an internal combustion engine. This supercharging system is configured to operate the electric compressor at a rotational speed necessary to compensate the difference between the actual intake flow rate and the target intake flow rate when the actual intake flow rate of the internal combustion engine is insufficient. [0003] prior art literature [0004] Patent Document 1: Japanese Patent Laid-Open No. 2007-077854 [0005...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00
CPCF02D43/00F02B2037/125F02D41/10F02B37/04F02B37/14F02B39/10F02D41/0007F02D2250/21F02B33/40Y02T10/12F02B37/007
Inventor 平山裕树
Owner TOYOTA JIDOSHA KK
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