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Control device and control method for spark ignition gasoline engine

A gasoline engine, spark ignition technology, used in engine control, combustion engines, machines/engines, etc., to solve problems such as deflagration exhaust, premature ignition, deflagration, etc.

Active Publication Date: 2016-09-07
MAZDA MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The high-compression-ratio spark-ignition gasoline engine described in Patent Document 1 is beneficial for improving thermal efficiency, but on the contrary, the working state of the engine, especially in the low-speed range and medium-to-high-load range, will cause premature ignition and easily lead to knocking (exhaust gas knocking) ) and other problems such as abnormal combustion

Method used

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  • Control device and control method for spark ignition gasoline engine
  • Control device and control method for spark ignition gasoline engine
  • Control device and control method for spark ignition gasoline engine

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Embodiment Construction

[0070] Next, an embodiment of a control device for a spark ignition type gasoline engine will be described with reference to the drawings. The embodiments described below are examples. figure 1 , figure 2 The schematic structure of the engine (engine main body) 1 is shown. The engine 1 is mounted on a vehicle, and is a spark ignition type gasoline engine supplied with fuel containing at least gasoline. The engine 1 has a cylinder block 11 provided with a plurality of cylinders 18 (only one is shown), a cylinder head 12 provided on the cylinder block 11, and an oil pan 13 provided on the lower side of the cylinder block 11 and storing lubricating oil. . The piston 14 is embedded in each cylinder 18 to perform reciprocating motion. Piston 14 is connected to crankshaft 15 via connecting rod 142 . A cavity 141 having the same shape as a concave combustion chamber of a diesel engine is formed on the top surface of the piston 14 . When the piston 14 is located near the compre...

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Abstract

An engine body includes a cylinder with a geometrical compression ratio of 15 or higher, and is supplied with fuel containing at least gasoline. When an operating mode of the engine body is in a high load range, a controller (i.e., a PCM 10) drives a fuel injection valve (i.e., an injector) 67 to inject the fuel at a time within a retarded period between a terminal stage of a compression stroke and an initial stage of an expansion stroke in a low speed range. The controller drives the fuel injection valve to inject the fuel in an intake stroke until an intake valve 21 is closed in a high-load high-speed range.

Description

technical field [0001] The technology disclosed here relates to a control device and a control method of a spark ignition type gasoline engine. Background technique [0002] On the point of improving the theoretical thermal efficiency of the spark ignition gasoline engine, it is effective to increase the geometric compression ratio of the engine. For example, Patent Document 1 describes a high compression ratio spark ignition direct injection engine in which the geometric compression ratio is set at 14 or higher. [0003] For example, as described in Patent Document 2, the combustion form of compression ignition of a lean mixture is known as a technique for achieving both an increase in exhaust gas emissions and an increase in thermal efficiency. In an engine that performs such compression ignition combustion, increasing the geometric compression ratio and increasing the compression end pressure and compression end temperature are beneficial to the stabilization of compress...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/04F02D41/32F02D21/08
CPCF02D41/006F02D41/0065F02D41/3029F02D41/3035F02D41/3064F02D41/401Y02T10/40F02D41/32
Inventor 岩井浩平山川正尚养祖隆藤川竜也古闲达也
Owner MAZDA MOTOR CORP