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Start control device of internal combustion engine

A technology for starting control device and internal combustion engine, which is applied in engine control, fuel injection control, internal combustion piston engine, etc., can solve the problems of unreliable, unreliable, and heavy load of engine starting characteristics.

Active Publication Date: 2010-01-06
MITSUBISHI MOTORS CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0011] According to the technique described in JP-A-2007-198308, when the fuel mixing ratio is unknown, the valve closing timing of the intake valve is advanced to the valve closing timing set according to the alcohol concentration in the fuel cylinder, so , the engine starting characteristics inevitably become very unreliable
In addition, according to the technique described in JP-A-2007-198308, cranking is performed after changing the valve closing timing of the intake valve, and therefore, the load at the time of starting is large, and it is lost for reducing Raw determination of load
Furthermore, according to the technique described in JP-A-2007-198308, a sensor for detecting the fuel mixing rate of alcohol-blended fuel such as detecting the alcohol concentration is separately required, and this increases the cost burden in addition to unreliability

Method used

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  • Start control device of internal combustion engine
  • Start control device of internal combustion engine
  • Start control device of internal combustion engine

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Embodiment Construction

[0038] In the following, based on Figure 1 to Figure 4 The invention will be described with reference to a first embodiment shown.

[0039] figure 1 Schematically shows part of an internal combustion engine, such as a reciprocating SOHC engine 1 that can use alcohol blended fuel (mixed fuel), and the control system of the same engine 1 .

[0040] First, describe Engine 1, in figure 1 In , reference numeral 2 denotes a cylinder block, and reference numeral 3 denotes a cylinder head mounted on an upper portion of the cylinder block 2 . In these cylinder blocks 1, cylinders 4 (only partly shown) are formed. Inside the cylinder 4, a piston 4 is mounted for reciprocating motion. The piston 6 is connected to a crankshaft 9 provided on the lower part of the cylinder block 2 via a connecting rod 7 and a crankpin 8 .

[0041] In the lower surface of the cylinder head 2, a combustion chamber 11 is formed. On both sides of the combustion chamber 11, an intake port 12 and an exhaus...

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Abstract

A start control device of an internal combustion engine, the start control device includes: a starting unit, which cranks the internal combustion engine to start the internal combustion engine while opening and closing an intake valve; a variable valve mechanism, which can change a closing timing of the intake valve; and a control unit, which controls the variable valve mechanism so as to advancethe closing timing of the intake valve while the starting unit cranks.

Description

Background technique [0001] The present invention relates to a start control device of an internal combustion engine that performs start by rotating a crankshaft in response to a start request. [0002] A reciprocating engine (internal combustion engine) mounted on an automobile (vehicle) is started by turning the crankshaft when the starter device is started in response to a start request issued by an operation on a start switch such as an ignition switch or a push switch . [0003] Normally, in an engine, in order to reduce the load at startup, by setting the closing timing of the intake valve to a timing separated from the bottom dead center of the compression stroke, the effective compression ratio is lowered and Reduced load. [0004] In recent years, this valve closing timing of the intake valve is set by using a variable valve mechanism that changes the opening and closing timing of the intake valve. [0005] Engine starting characteristics at extremely low ambient t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/00F02D41/06
CPCY02T10/18
Inventor 吉川智村田真一
Owner MITSUBISHI MOTORS CORP
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