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Control device for internal combustion engine

A technology of a control device and an internal combustion engine, applied in engine control, internal combustion piston engine, electrical control, etc., can solve problems such as difficulty in allowing the wastegate valve to open, increase air pressure, etc., and achieve the effect of improving fuel efficiency and reducing pumping loss.

Active Publication Date: 2015-11-04
MITSUBISHI MOTORS CORP
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AI Technical Summary

Problems solved by technology

[0004] However, in the case where the opening of the wastegate valve is controlled by a positive pressure type actuator as described above, for example, if the wastegate valve needs to be fully opened when the required boost pressure is low, it is impossible to increase The pressure of the air to be introduced into the actuator
Therefore, it is difficult to allow the wastegate valve to be fully opened

Method used

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  • Control device for internal combustion engine
  • Control device for internal combustion engine
  • Control device for internal combustion engine

Examples

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Embodiment Construction

[0031] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0032] figure 1 is a schematic diagram of a direct injection gasoline engine to which a control device for an internal combustion engine is applied (hereinafter referred to as engine 1 ) (internal combustion engine).

[0033] Such as figure 1 As shown, the engine 1 is a direct-injection four-stroke in-line four-cylinder gasoline engine in which fuel is injected into the combustion chamber 8 from a fuel injection valve 16 provided in the cylinder head 3 . figure 1 A longitudinal section of a cylinder of engine 1 is shown. Since the other cylinders are considered to have the same structure, they are not shown and there is no repeated description for them.

[0034] Such as figure 1 As shown, the engine 1 consists of a cylinder block 2 on which a cylinder head 3 is mounted.

[0035] The cylinder block 2 is provided with cylinders 2a. In the cylinder 2a, a piston 4 is verticall...

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Abstract

When the vehicle is in a normal driving state or is gently accelerating, the degree of opening of an electric waste gate valve (31) is set such that the actual air flow volume is at a minimum. Then, feedback control is applied to the degree of opening of an electronic control throttle valve (21) so as to achieve the actual intake air amount which produces an engine (1) output torque that is in accordance with the engine load. When the degree of opening of the electronic throttle valve (21) is fully open, the degree of opening of the electronic throttle valve (21) is maintained, and feedback control is applied to the degree of opening of the electric waste gate valve (31) so as to achieve the actual intake air amount (that is, the target intake air amount) which produces an engine (1) output torque that is in accordance with the engine load.

Description

technical field [0001] The present invention relates to control devices for internal combustion engines, and more particularly to the operational control of wastegate valves. Background technique [0002] Hitherto, internal combustion engines have been provided with a supercharger such as a turbocharger in order to improve output performance and fuel efficiency. In such an internal combustion engine including a supercharger, a boost pressure adjusting device is provided for adjusting the pressure of intake air or the boost pressure introduced into a combustion chamber of the internal combustion engine. The boost pressure adjusting device includes: a bypass passage provided in the exhaust pipe so that exhaust gas introduced into an exhaust turbine of the turbocharger is allowed to bypass the downstream of the exhaust turbine; A wastegate valve for adjusting the flow rate of exhaust gas flowing to the bypass passage; a positive pressure actuator for adjusting the opening degr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/18F02B37/12
CPCF02B37/18F02D41/0007F02D41/10F02D41/18F02D2200/0404F02D2200/0406F02D2200/0414F02D2200/1004Y02T10/144Y02T10/12
Inventor 三原法行
Owner MITSUBISHI MOTORS CORP
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