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US 9,957,915 B2Granted
Cylinder head
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKohei Kodama
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorKohei Kodama
Estimating the term…
The cylinder head includes: an intake port; a low-temperature cooling water channel for circulating low-temperature cooling water; a high-temperature cooling water channel for circulating cooling water of a higher temperature than the cooling water flowing through the low-temperature cooling water channel; and a gas channel for recirculating a portion of blow-by gas or EGR gas to the intake port. The low-temperature cooling water channel is configured to include a first water jacket that covers at least one portion of the wall surface of the intake port on an intake-air upstream side relative to an opening end opening at a wall surface of the intake port from the gas channel.
A cylinder head for an internal combustion engine including two cooling water circulation systems in which temperatures of cooling water are different, comprising:
A cylinder head for an internal combustion engine including two cooling water circulation systems in which temperatures of cooling water are different, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
For liquid cooling: cylinder heads with means for directing, guiding, or distributing liquid stream
Fluid connections to the air intake system; their arrangement of pipes, valves or the like: exhaust gas recirculation [EGR]; Positive crankcase…
Arrangements for cooling cylinders or cylinder heads: cooling cylinders and cylinder heads in parallel
Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture:…
About 9 years 7 months of term left · ends 31 May 2036 (estimated)
The present application claims priority to Japanese Patent Application No. 2015-100285 filed on May 15, 2015, which is incorporated herein by reference in its entirety.
The present invention relates to a cylinder head of an internal combustion engine, and more particularly to a cylinder head that includes a channel through which cooling water flows.
A channel through which cooling water flows is formed in a cylinder head of an internal combustion engine. Japanese Patent Laid-Open No. 2013-133746 discloses a configuration in which, in order to cool air inside an intake port, a first cooling water circuit through which cooling water that cools the periphery of an intake port circulates is provided inside a cylinder head independently from a second cooling water circuit through which cooling water that cools the periphery of an exhaust port circulates that is provided inside a cylinder block and the cylinder head.
FIG. 1 is a view illustrating a configuration of a cooling apparatus of a first embodiment;
FIG. 2 is a cross-sectional view illustrating a cross section that is perpendicular to a longitudinal direction that includes a central axis of an intake valve insertion hole of a cylinder head;
FIG. 3 is a flowchart illustrating a control flow of LT flow rate control;
Embodiments of the present invention are described hereunder with reference to the accompanying drawings. However, it is to be understood that even when the number, quantity, amount, range or other numerical attribute of an element is mentioned in the following description of the embodiments, the present invention is not limited to the mentioned numerical attribute unless it is expressly stated or theoretically defined. Further, structures or steps or the like described in conjunction with the following embodiments are not necessarily essential to the present invention unless expressly stated or theoretically defined.
First Embodiment
1. Configuration of Cooling Apparatus