Water-cooled internal combustion engine for vehicle

An internal combustion engine and water-cooled technology, applied in mechanical equipment, liquid cooling, engine components, etc., can solve problems such as water temperature fluctuations, temperature control characteristics of thermostats deviating, etc., and achieve the effect of reducing weight, suppressing increase, and suppressing the number of parts

Active Publication Date: 2010-10-06
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the invention disclosed in the above-mentioned Patent Document 1, during the warm-up operation of the internal combustion engine, the temperature of the cooling water flowing into the thermostat from the bypass passage cannot accurately reflect the temperature of the cooling water in the water jacket. If the water temperature fluctuates greatly, the temperature control characteristics of the thermostat may deviate from the specified characteristics.

Method used

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  • Water-cooled internal combustion engine for vehicle
  • Water-cooled internal combustion engine for vehicle
  • Water-cooled internal combustion engine for vehicle

Examples

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Embodiment 1

[0058] refer to Figure 1 to Figure 13 Embodiment 1 of the present invention is described, at first, in figure 1 Among them, the body frame F of the two-wheeled motorcycle has: a head pipe 17, a front fork 15 that can steerably support the front wheel WF, and a steering handle 16; a main frame 18 extending rearward and downward from the head pipe 17; The lower frame 19 is connected to the head pipe 17 under the main frame 18 and extends backward and downward from the main frame 18 at a steep angle; it connects the left and right sides of the rear part of the main frame 18 and the lower frame. A pair of left and right underframes 20 ... between the left and right sides of the lower end of the frame 19; a pair of left and right seat rails 21 ... connected to the rear of the main frame 18 and extending backward; connecting the underframes 20 ... and a pair of left and right rear frames 22 ... between the seat rails 21 ....

[0059] The underframe 20 integrally has: a first fram...

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PUM

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Abstract

The invention provides a water-cooled internal combustion engine for a vehicle. A water jacket allowing the cooling water to circulate is formed on an internal combustion engine main body having a cylinder cover. A thermostat is installed on the internal combustion engine main body and controls according to a state of the cooling water which is discharged from the water jacket and guided to a radiator side and the state of that guided to a bypass path side; the thermostat is equipped on the cylinder cover and forms at least a part of a bypass path on the internal combustion engine main body and avoids the heat from the internal combustion engine main body from influencing the cooling water circulating in the bypass path as much as possible. The thermostat (84) is equipped on the cylinder cover (27). A part of the bypass path (83) is adjacent to an air inlet (45). Viewing along the axial direction of a cylinder hole (40), a part of the bypass path (83) extends in a direction orthogonalto the air inlet (45) and the bypass path and the air inlet (45) are overlapped on the cylinder cover.

Description

technical field [0001] The present invention relates to a vehicle water-cooled internal combustion engine, wherein the internal combustion engine main body has: a cylinder block having a cylinder bore in which a piston is freely slidably fitted; The chamber is combined with the cylinder block, and is provided with an air inlet that can communicate with the combustion chamber. On the main body of the internal combustion engine, a water jacket for circulating cooling water is formed, and a thermostat is installed on the main body of the internal combustion engine. The thermostat controls the state of guiding the cooling water drawn out from the water jacket to the radiator side and the state of guiding the cooling water to the side of the bypass passage that detours around the radiator according to the temperature of the cooling water. Background technique [0002] Patent Document 1 discloses a water-cooled internal combustion engine. A water pump and a thermostat disposed clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P7/16F02F1/42F01P3/00F02D35/00
Inventor 原田诚片冈大河窪宽之
Owner HONDA MOTOR CO LTD
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