Engine controller

A control device and engine technology, applied in the direction of engine control, combustion engine, machine/engine, etc., can solve problems such as pressure boost limitation, inability to fully experience the vehicle's operating feeling, acceleration not following accelerator pedal pedaling amount or pedaling speed, etc. , to achieve the effect of improving acceleration responsiveness and ensuring emission suppression performance

Inactive Publication Date: 2017-08-22
MAZDA MOTOR CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the driver feels that the acceleration of the vehicle cannot follow the amount or speed of depression of the accelerator pedal, and thus cannot fully appreciate the operating feeling of the vehicle.
[0006] In addition, there are cases where the supercharger is limited due to the limited capacity of the supercharger. In such a case, there is also the same problem that the acceleration of the vehicle cannot follow the amount of depression of the accelerator pedal, etc.

Method used

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  • Engine controller
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Embodiment Construction

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022]

[0023] First, according to figure 1 An engine system to which the engine control device according to the embodiment of the present invention is applied will be described.

[0024] Such as figure 1 As shown, the engine system 200 includes: a diesel engine E (hereinafter referred to as the engine E); an intake system IN for supplying intake air to the engine E; a fuel supply system FS for supplying fuel to the engine E; exhaust gas discharged from the engine E exhaust system EX; sensors 97 to 110 that detect various states related to the engine system 200; PCM (Power train Control Module) 60 that performs control of the engine system 200 (such as figure 2 shown).

[0025] The intake system IN has an intake channel 1 through which intake air passes. On the intake passage 1, an air cleaner 3 that cleans the air introduced fro...

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Abstract

The engine controller includes an acceleration input detector that detects an accelerator pedal motion, a fuel injection amount calculator that calculates a target fuel injection amount, a fuel injection controller that controls the fuel injector, an EGR valve opening calculator that calculates a target EGR valve opening, and an EGR controller that controls the EGR valve. The EGR controller controls, after the accelerator pedal motion has been given, the EGR valve in a direction to decrease an opening of the EGR valve to a target EGR valve opening corresponding to a running condition to be reached after the accelerator pedal motion has been given. The control of the EGR valve opening is started before the fuel injection controller controls the fuel injector based on the target fuel injection amount calculated by the fuel injection amount calculator based on the accelerator pedal motion.

Description

technical field [0001] The present invention relates to an engine control device, and more particularly, to an engine control device capable of ensuring emission suppression performance and improving acceleration responsiveness. Background technique [0002] Conventionally, a diesel engine equipped with a supercharger has been developed in order to improve the acceleration performance of the diesel engine. In such a diesel engine, when acceleration is started in a state where the accelerator opening is small, the combustion chamber tends to be temporarily insufficient in oxygen due to a delay in supercharging, and black smoke tends to be easily generated. [0003] Japanese Patent Laid-Open Publication No. 2008-240682 (hereinafter referred to as patent document) discloses a technique for solving the above-mentioned problems. This patent document discloses a control device for a diesel engine provided with fuel injection limiting means for setting an upper limit value of a fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/10F02D41/30F02D21/08
CPCF02D21/08F02D41/0077F02D41/10F02D41/30F02D2021/083F02D2200/1004F02D2200/602F02D11/105F02D41/0007F02D41/005F02D41/1454F02D41/401F02D2041/389F02D2250/38Y02T10/12Y02T10/40F02D41/26
Inventor 上杉康笵皆本洋氏原健幸藤冈阳一
Owner MAZDA MOTOR CORP
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