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Engine control device

A control device and engine technology, applied in engine control, engine starting, engine components, etc., can solve problems such as insufficient learning frequency, engine stall torque, deviation, etc.

Active Publication Date: 2014-02-26
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, idling stop is prohibited even when learning is not required, which may lead to deterioration of fuel consumption, or when driving in an area where deposit deposition is likely to increase, the learning frequency may be insufficient, resulting in engine stall and torque deviation

Method used

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Embodiment Construction

[0038] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0039] figure 1 It is a schematic configuration diagram showing an embodiment of the engine control device of the present invention together with an engine for a hybrid vehicle to which it is applied.

[0040] The engine 1 shown in the figure is a DOHC type multi-cylinder four-stroke engine. It includes a cylinder 2 composed of a cylinder head 2A and a cylinder block 2B. The cylinder head 2A is provided with a camshaft 31 for an intake valve 32 and an exhaust valve. The camshaft 33 for 34 has a piston 5 slidably inserted in the cylinder 2B, and a combustion operation chamber 3 having a combustion chamber (top cover or top) of a predetermined shape is defined above the piston 5, facing the combustion operation The chamber 3 is provided with a spark plug 22 connected to an ignition unit 23 composed of an ignition coil or the like.

[0041] The air for fuel combustion passes thr...

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PUM

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Abstract

Provided is an engine control device which is capable of learning properly a change in the relationship between the throttle opening degree and the air intake quantity (opening degree-air quantity characteristic), while suppressing deterioration of fuel consumption to the minimum, and which is capable of preventing engine stall and improving torque control accuracy and the like. The engine control device comprises: a learning means that learns a characteristic change in the opening degree-air quantity characteristic; a learning necessity determination means that determines whether the learning is necessary; and a learning transition means that, when it is determined that the learning is necessary, causes the learning means to perform the learning in a stable driving state. The learning necessity determination means obtains, in the stable driving state, an amount of deviation between the air intake quantity corresponding to the throttle valve opening degree at that time stored in a characteristic storage means and the actual air intake quantity detected by an air flow sensor, and determines whether the learning is necessary by using the amount of deviation and a threshold value set therefor.

Description

Technical field [0001] The present invention relates to an engine control device, especially when the operating state of the engine and the vehicle equipped with it meets predetermined conditions, it performs idle stop to temporarily stop the engine and learns the relationship between the throttle valve opening of the engine and the amount of intake air (hereinafter referred to as It is a control device for changes in engine characteristics such as opening degree-air volume characteristics. Background technique [0002] In the technical field of motor vehicles, it is known that for the purposes of improving fuel consumption and reducing greenhouse gas emissions, when the state of the engine and its equipped vehicle meets predetermined conditions, such as the waiting signal state, an idling stop is performed to temporarily stop the engine. After that, when the driver operates the accelerator pedal, the technology is restarted. [0003] In addition, it is known that in a hybrid vehi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D45/00F02D29/02F02D41/04
CPCF02D11/10F02D2200/0404F02D41/2441F02D41/2438F02D41/2464F02D41/18F02N11/0829Y02T10/40F02D28/00
Inventor 小室敦
Owner HITACHI ASTEMO LTD
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