Diesel engine and method of controlling the diesel engine

A diesel engine and engine technology, applied in the direction of engine control, engine incandescent ignition, engine ignition, etc., can solve the problems of prolonged ignition delay, low temperature and pressure, etc.

Inactive Publication Date: 2016-02-17
MAZDA MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an engine with a geometric compression ratio set at a low compression ratio such as 15:1 or lower, the temperature and pressure at the end of the compression stroke are lower, so that the ignition delay tends to be prolonged

Method used

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  • Diesel engine and method of controlling the diesel engine
  • Diesel engine and method of controlling the diesel engine
  • Diesel engine and method of controlling the diesel engine

Examples

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Embodiment Construction

[0037] A diesel engine according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following descriptions of the preferred embodiments are examples only. figure 1 and 2 A schematic structure of an engine (engine body) 1 of this embodiment is shown. The engine 1 is a diesel engine installed in a vehicle and supplied with fuel in which a main component is diesel fuel. The diesel engine includes a cylinder block 11 having a plurality of cylinders 11a (only one cylinder is shown), a cylinder head 12 provided on the cylinder block 11, and an oil sump provided below the cylinder block 11 and storing lubricating oil therein. shell13. In the cylinder 11 a of the engine 1 , pistons 14 are reciprocally installed, and a cavity forming a part of a neck-type combustion chamber 14 a is formed on the top surface of each piston 14 . Each piston 14 is connected to a crankshaft 15 through a co...

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Abstract

The invention relates to a diesel engine and a method of controlling the same. The diesel engine of the present invention includes an engine body supplied with fuel containing diesel fuel as its main component, and the geometric compression ratio is set below 15:1; it is arranged in the engine body toward the cylinder of the engine body and directly injected a fuel injection valve for fuel into the cylinder; and a control module for controlling a pattern of injecting the fuel into the cylinder through the fuel injection valve. The control module performs a main injection such that the injected fuel produces a main combustion mainly comprising diffusion combustion, and performs a plurality of pre-stage injections prior to the main injection such that the injected fuel produces a pre-stage prior to the main combustion combustion. The control module controls an injection pattern of the injection to adjust a heat release rate.

Description

technical field [0001] The present invention relates to a low compression ratio diesel engine having a geometric compression ratio set low. Background technique [0002] In a diesel engine mounted to a vehicle, in order to, for example, reduce NOx and black smoke contained in exhaust gas, reduce noise or vibration, and improve fuel consumption and torque, fuel is executed multiple times in each cylinder in one cycle of the engine injection. For example, JP2009-293383A discloses a diesel engine with a turbocharger that performs five fuel injections: a main injection for generating torque, a pilot injection performed before the main injection to preheat the cylinder, Pre-injection performed between pilot injection and main injection to suppress ignition delay of fuel injected by main injection, after-injection performed after main injection to increase exhaust gas temperature, and after after-injection postinjection that increases the temperature of the catalyst by introduci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/38
CPCF02D41/3035F02D41/402F02D41/403F02P5/153F02P19/02Y02T10/40
Inventor 志茂大辅金尚奎西本京太郎森永真一丸山庆士皆本洋铁野雅之名越匡宏
Owner MAZDA MOTOR CORP
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