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Controller and control method for internal combustion engine

一种控制装置、内燃机的技术，应用在发动机控制、内燃活塞发动机、电气控制等方向，能够解决无法控制增压压力、增压压力无法达到控制目标值等问题，达到抑制碰撞声的效果

Active Publication Date: 2018-04-20
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it may not be possible to control the desired supercharging pressure, or the supercharging pressure may not reach the control target value.

Method used

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  • Controller and control method for internal combustion engine
  • Controller and control method for internal combustion engine
  • Controller and control method for internal combustion engine

Examples

Experimental program
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Effect test

Embodiment approach 1

[0039] figure 1 It is a configuration diagram showing an engine system to which the control device 50 of the engine 10 according to Embodiment 1 of the present invention is applied. figure 1 In the engine 10, an air filter 12 is installed at the inlet of the intake passage 11. An air flow sensor 51 for detecting the amount of intake air is provided on the downstream side of the air filter 12 .

[0040] The turbocharger 20 is provided on the downstream side of the airflow sensor 51 . The turbocharger 20 includes a compressor 201 and a turbine 202 . The compressor 201 and the turbine 202 are integrally connected by a connecting shaft. The compressor 201 is rotationally driven by the energy of the exhaust gas of the engine 10 input to the turbine 202 .

[0041] An intercooler 13 for cooling the compressed air is disposed downstream of the compressor 201 . A throttle valve 14 is arranged on the downstream side of the intercooler 13 . A boost pressure sensor 52 is provided be...

Embodiment approach 2

[0122]In Embodiment 2 of the present invention, the control device 50 that calculates the target opening degree Sv by processing different from that in Embodiment 1 described above will be described. In this Embodiment 2, the description of the same points as the previous Embodiment 1 is omitted, and the description is mainly made on the differences from the previous Embodiment 1. FIG.

[0123] Here, the configuration of the engine system and the control device 50 to which the control device 50 according to the second embodiment is applied is similar to that of Figure 1 ~ Figure 3 the same structure.

[0124] Figure 10 It is a flowchart showing a series of operations of the control device 50 according to Embodiment 2 of the present invention. Figure 10 The processing shown in the flowchart is repeatedly executed, for example, in a preset control cycle.

[0125] Figure 10 , steps S201 to S205 are carried out with the previous Image 6 The same processing as steps S101 ...

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PUM

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Abstract

The present invention provides a controller and a control method for an internal combustion engine. The controller and the method can suppress the generation of an annoying collision noise and abnormal heating of a motor of an actuator, which are generated by contact of the output shaft of the actuator with an opening side stopper of the actuator. The controller and the control method for the internal combustion engine are configured such that a target opening (Sv) of the valve is set to the smaller of: a required target opening (Sv_dem) computed so that a target supercharging pressure (Sp) and an actual supercharging pressure (Pp) are matched with each other; and a restricted target opening (Sv_lmt) computed based on a fully closed position learning value (Pv_lrn), which corresponds to anactual position detected by a position sensor, when the valve is located in the fully closed position, and on the restricted target position.

Description

technical field [0001] The present invention relates to a control device and a control method for an internal combustion engine that controls the flow rate of exhaust gas from the internal combustion engine to a turbocharger by operating an actuator to adjust the opening of a valve. Background technique [0002] Conventionally, a turbocharger is mounted on an internal combustion engine (hereinafter referred to as an engine) for the purpose of increasing the output of the internal combustion engine (hereinafter referred to as an engine). The turbocharger includes a turbine that rotates under the action of exhaust gas from the internal combustion engine, and a compressor that operates by rotating the turbine. [0003] In the case of operating such a turbocharger, when the engine is operated under high-speed rotation and high load, the pressure in the intake passage of the engine, that is, the supercharging pressure, will rise above the required level, which may cause Engine d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/12F02B37/18
CPCF02B37/12F02B37/18F02B37/183F02B33/44F02B37/186F02D23/00F02D41/0007F02D41/2464F02D2250/16Y02T10/12
Inventor 高桥建彦大野隆彦
Owner MITSUBISHI ELECTRIC CORP
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