Control device of spark-ignition gasoline engine
A gasoline engine, spark ignition technology, applied in the direction of electric spark ignition controller, engine control, electric engine control automatic control, etc., can solve problems such as abnormal combustion
Inactive Publication Date: 2015-07-01
MAZDA MOTOR CORP
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- Description
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- Application Information
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Problems solved by technology
However, an engine whose geometric compression ratio is set relatively high for the purpose of stabilizing compression ignition combustion may cause abnormal combustion similarly to the engine of Patent Document 1 in the high-load operating region where spark ignition combustion is performed. question
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Embodiment Construction
[0093] Embodiments of a control device for a spark ignition type gasoline engine will be described below with reference to the drawings. The following descriptions of preferred embodiments are exemplifications. figure 1 , 2 The schematic configuration of the engine (engine body) 1 is shown. The engine 1 is a spark-ignition gasoline engine mounted on a vehicle and supplied with fuel containing at least gasoline. The engine 1 includes a cylinder block 11 provided with a plurality of cylinders 18 (only one is shown), a cylinder head 12 disposed on the cylinder block 11 , and a lower side of the cylinder block 11 for storing lubricating oil. the oil pan 13. A piston 14 connected to the crankshaft 15 via a connecting rod 142 is inserted into each cylinder 18 so as to reciprocate. On the top surface of the piston 14, such as image 3 As shown in the enlarged representation of , a cavity 141 is formed in the shape of a reentrant corner. When the cavity 141 is located near the c...
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The disclosure provides a control device of a spark-ignition gasoline engine. When an operating state of an engine body is within a low engine speed range, a controller operates a fuel pressure variable mechanism so that a fuel pressure is higher within a high engine load range compared to a low engine load range, the controller operates, within the high engine load range, a fuel injection mechanism to perform at least a fuel injection into the cylinder by a cylinder internal injection valve at a timing during a retard period from a late stage of a compression stroke to an early stage of an expansion stroke, and the controller operates, within the high engine load range, an ignition plug to ignite at a timing during the retard period and after the fuel injection.
Description
technical field [0001] The technology disclosed herein relates to controls for spark-ignition gasoline engines. Background technique [0002] To improve the theoretical thermal efficiency of spark ignition gasoline engine, it is an effective method to increase its geometric compression ratio. For example, Patent Document 1 describes a spark ignition type direct injection engine with a high compression ratio of 14 or more in which the geometric compression ratio is set. [0003] In addition, as described in Patent Document 2, for example, as a technology that can achieve both improvement in exhaust emission and improvement in thermal efficiency, a combustion method in which lean gas is compressed and ignited is known. In an engine that performs such compression ignition combustion, increasing the geometric compression ratio increases the compression end pressure and the compression end temperature, respectively, thereby contributing to the stabilization of compression igniti...
Claims
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IPC IPC(8): F02D41/02F02D41/30
CPCF02D41/1441F02D41/0002F02M25/0727F02D2200/0406Y02T10/44F02D2200/101F02D37/02F02P5/045F02M63/0225F02D41/402F02D41/1456F02D35/02F02P5/152F02D2200/021F02D41/18F02D41/3836F02D21/08F02D41/3029F02M69/046Y02T10/47F02D41/0057Y02T10/42F02D2200/0414F02D41/3041F02D41/3094F02D2041/001F02D35/027F02D41/3023F02D41/401F02M45/02F02D2200/602F02M26/23Y02T10/40
Inventor 岩井浩平山川正尚太田统之长津和弘养祖隆渡边一丰栗田宽之渡边直哉长野高皓大场秀儿
Owner MAZDA MOTOR CORP