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Device and method for controlling start of compression self-ignition engine

A technology of starting control device and automatic ignition, which is applied in the direction of engine starting, engine control, engine motor starting, etc., can solve the problems of less compression stroke, unable to ignite, narrowing of fuel, etc., so as to improve ignitability and ensure starting. Sexual, quick-acting effects

Inactive Publication Date: 2013-04-03
MAZDA MOTOR CORP
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, when the piston stops near the top dead center, the temperature in the cylinder at the time of compression to the top dead center due to the smaller amount of compression stroke compared to the case where the piston stops near the bottom dead center (for the sake of explanation, this is referred to as is the "top dead center temperature") insufficient, resulting in the possibility that the fuel cannot be ignited
Therefore, in the conventional one-compression starting method, there is a problem that the range of the reference stop position can only be limited to a range close to the bottom dead center (the problem of narrowing the range of the reference stop position)

Method used

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  • Device and method for controlling start of compression self-ignition engine

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Embodiment Construction

[0028] (1) The overall structure of the engine

[0029] figure 1 It is a system configuration diagram showing the overall configuration of a diesel engine to which a start control device according to an embodiment of the present invention is applied. The diesel engine shown in this figure is a four-stroke diesel engine mounted on a vehicle as a driving power source. The engine main body 1 of this engine is a so-called inline four-cylinder type, and has a cylinder block 3 of four cylinders 2A to 2D arranged in a row in a direction perpendicular to the paper, and a cylinder block 3 provided on the upper surface of the cylinder block 3 . The cap 4 and the piston 5 are reciprocally slidably inserted into the respective cylinders 2A to 2D.

[0030] A combustion chamber 6 is formed above the piston 5 , and fuel (light oil) injected from a fuel injection valve 15 described later is supplied to the combustion chamber 6 . Then, the injected fuel auto-ignites in the high-temperature ...

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Abstract

The invention relates to a device and method for controlling start of a compression self-ignition engine. According to the device and method for controlling start of a compression self-ignition engine, a restart controller (52) of an electronic control unit (50) determines whether the restart condition of the engine is satisfied based on the various sensor values (Step S21), the piston stop position of the compression-stroke-in-stop cylinder is confirmed to be within the reference stop position range R (Step S22: YES), the fuel is injected in the compression-stroke-in-stop cylinder, the controller controls the fuel injector to perform a pre-injection before a main injection and increase a total injection amount of the fuel for the pre-injection as the stop position of the compression-stroke-in-stop cylinder piston is further on a top dead center side (Step S23)

Description

technical field [0001] The present invention relates to a compression auto-ignition engine installed on a compression auto-ignition engine that combusts fuel injected into a cylinder by auto-ignition, automatically stops the above-mentioned engine when a predetermined automatic stop condition is satisfied, and then uses a starter motor when a predetermined restart condition is satisfied A start control device for a compression auto-ignition engine that restarts the above-mentioned engine by injecting fuel into a compression stroke cylinder that is in the compression stroke when the engine is stopped by applying rotational force to the engine. Background technique [0002] The thermal efficiency of a compression auto-ignition engine represented by a diesel engine is generally better than a spark-ignition engine like a gasoline engine, and the emitted CO 2 The amount is also small, so it has been widely used as a vehicle engine in recent years. [0003] For a compression auto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/04F02D41/06F02D41/30
CPCF02D41/40F02D41/30F02N11/0814F02D2041/0095F02D41/06F02D41/009F02D2200/021F02D45/00F02D41/04F02D41/403F02D41/065F02N99/006F02N2019/008Y02T10/40
Inventor 中本仁寿山内健生田贺淳一
Owner MAZDA MOTOR CORP
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