Internal combustion engine starting method and starter

A starting method and an internal combustion engine technology, which are applied to the starting of the engine, the valve driving device, the starting of the motor for the engine, etc., can solve the problems of increasing the running-up angle and increasing the size of the starting motor, so as to improve the starting performance, avoid large-scale, The effect of a large approach angle

Inactive Publication Date: 2003-02-26
HONDA MOTOR CO LTD
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  • Description
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Problems solved by technology

Therefore, in order to reliably cross the above-mentioned first compression dead point, when using the starter motor to start the internal combustion engine, it is necessary to increase the output drive torque, which has the problem of increasing the

Method used

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  • Internal combustion engine starting method and starter
  • Internal combustion engine starting method and starter
  • Internal combustion engine starting method and starter

Examples

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Embodiment Construction

[0034] Below, refer to Figure 1 ~ Figure 1 4 illustrates embodiments of the present invention.

[0035] refer to figure 1 , figure 2 The internal combustion engine E using the present invention is a SOHC type single-cylinder four-stroke internal combustion engine mounted on a motorcycle, and the internal combustion engine E has a cylinder 1, a cylinder head 2 connected to the upper end of the cylinder 1, and a cylinder head connected to the cylinder head. 2. A cylinder head cover 3 at the upper end, and a crankcase (not shown) that is connected to the lower end of the cylinder 1 and rotatably supports the crankshaft 4. A piston 5 slidably fitted in a cylinder bore 1 a formed in the cylinder 1 is connected to a crankshaft 4 through a connecting rod 6 , and the crankshaft 4 is driven to rotate by the reciprocating piston 5 . Furthermore, when the internal combustion engine E is started, the crankshaft 4 is driven to rotate by the starter motor M, which is a motor capable of...

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PUM

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Abstract

The invention provides a starting method and starting device for internal combustion engine to easily break down the top dead center of initial compression after the release of decompression operation, while avoiding the upsizing of an electric motor for starting. In an internal combustion engine having a decompression mechanism, a decompression cam rotatable, in relation to a camshaft in the angle Ad between a first and second stop positions, has a cam profile such that an exhaust valve is in an opening state at the first stop position and in a closing state at the second stop position. At engine start (position P1), the decompression cam is rotated in reverse to locate at the first stop position by reversely rotating a crankshaft with the electric motor, and after the crankshaft only is further rotated reversely (position P3), the decompression cam is rotated positively, by positively rotating the crankshaft with the motor. During the decompression cam reaches the second stop position, it makes the exhaust valve in the opening state to enlarge a crankshaft runup angle in either one of compression stroke (S8, S12) included in the range of reverse rotation angle Ar or an initial compression stroke, after starting the positive rotation of decompression cam.

Description

technical field [0001] The invention relates to a starting device and a method for starting an internal combustion engine with the starting device. The internal combustion engine has a crankshaft driven by an electric motor when the internal combustion engine is started. The starting device has an electric motor and a decompression mechanism. An internal combustion engine valve opened and closed by a movable valve cam on a camshaft driven to rotate in synchronization with the rotation of the crankshaft opens with a predetermined decompression lift amount to decompress the compression pressure in the compression stroke of the internal combustion engine. Background technique [0002] Internal combustion engines having a crankshaft driven in rotation by a starter motor at start are well known. There is also known an internal combustion engine having a decompression mechanism that opens and closes an internal combustion engine valve that is opened and closed by a movable valve c...

Claims

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Application Information

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IPC IPC(8): F01L1/053F01L1/08F01L13/08F02D13/08F02N11/08F02N99/00
CPCF01L1/053F01L2001/0475F02N19/005F01L13/08F02N2019/007F01L1/08F02N19/004F02N99/00
Inventor 小之泽圣二小笠原敦生井邦明
Owner HONDA MOTOR CO LTD
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