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Internal combustion engine with variable compression ratio, and method of discharging cooling water of internal combustion engine with variable compression ratio

A compression ratio, internal combustion engine technology, applied in the direction of engine cooling, liquid cooling, machine/engine, etc., can solve the problem that the coolant cannot be properly discharged, the coolant cannot be guided, etc.

Inactive Publication Date: 2011-07-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the drain hole for connecting the water jacket and the outside of the cylinder block is simply formed, the coolant cannot be guided to the outside of the crankcase, that is, the coolant cannot be properly drained.

Method used

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  • Internal combustion engine with variable compression ratio, and method of discharging cooling water of internal combustion engine with variable compression ratio
  • Internal combustion engine with variable compression ratio, and method of discharging cooling water of internal combustion engine with variable compression ratio
  • Internal combustion engine with variable compression ratio, and method of discharging cooling water of internal combustion engine with variable compression ratio

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Embodiment Construction

[0044] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0045] figure 1 The cylinder block 3 and the crankcase 4 of a variable compression ratio internal combustion engine 1 (to be simply referred to as "internal combustion engine 1") according to an exemplary embodiment of the present invention are schematically shown. reference figure 1 , The cylinder block 3 and the crankcase 4 are separated from each other. The cylinder 2 and a water jacket 5 as a coolant passage are formed in the cylinder block 3. A cylinder head not shown in the figure is provided on the cylinder block 3. A crankshaft, connecting rod and piston not shown in the figure are arranged in the crankcase 4.

[0046] The crankcase 4 has an accommodation portion 4a that accommodates the cylinder block 3. When the compression ratio of the internal combustion engine 1 is changed, a variable compression ratio mechanism not shown in t...

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Abstract

A cylinder block side drain (3f) is provided in a cylinder block (3) and a crankcase side drain (4h) is provided in a crankcase (4). A jacket cover (80) is provided in an water jacket (5) of the cylinder block (3). The jacket cover (80) is pressed against the wall of the water jacket (5) on the crankcase side. When discharging the coolant, the water jacket (5) is opened by pushing the jacket cover (80) inward using a coupler (6) and the coolant is discharged to the outer side of the crankcase (4) via the coupler (6).

Description

Technical field [0001] The present invention relates to a variable compression ratio internal combustion engine that changes its compression ratio, and more particularly to a drainage structure for discharging coolant from a variable compression ratio internal combustion engine and a method for discharging coolant from a variable compression ratio internal combustion engine. Background technique [0002] In recent years, in order to improve the fuel efficiency and output performance of internal combustion engines, techniques for variably controlling the compression ratio of internal combustion engines have been proposed. One such technique is described in Japanese Patent Application Publication No. JP-A-2003-206771. In the internal combustion engine mentioned in this publication, a cylinder block and a crankcase are connected to each other so that the cylinder block can move relative to the crankcase, and a camshaft is provided in the connection between the cylinder block and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01P11/02F02B75/04F02F7/00
CPCF02B75/041F01P2003/021F01P11/0276F02F7/0065F01P11/02F02B75/04F02F7/00
Inventor 柏正明
Owner TOYOTA JIDOSHA KK