Thermally insulated insert member and engine having same
AssigneeHonda Motor Co., Ltd.
InventorsKenichiro Ikeya, Satoshi Yamamura
Life of this patent
Estimating the term…
Abstract
Provided is a thermally insulated insert member and an engine having the thermally insulated insert member. Thermally insulated insert member is disposed in an intake port of a cylinder head of the engine. The thermally insulated insert member includes a guide member that guides a flow of intake air flowing in t he intake port; and a thermally insulative support member with a shape that can be fitted within the intake port. The guide member is formed of a metal and is supported in the intake port via the thermally insulative support member.
Claims12
A thermally insulated insert member disposed in an intake port of a cylinder head of an engine, the thermally insulated insert member comprising:
- a guide member that guides a flow of intake air flowing in the intake port;
- and
- a thermally insulative support member with a shape that can be fitted within the intake port,
- wherein the guide member is formed of a metal and is supported in the intake port via the thermally insulative support member,
- wherein the guide member extends further than the thermally insulative support member toward a combustion chamber of the engine,
- wherein the guide member is a plate, and is arranged such that a plate surface of the guide member extends along a direction in which the intake port extends,
- wherein the thermally insulative support member is formed of a tube body with an external shape substantially the same as a shape of the intake port,
- wherein the intake port defines a branch point at which the intake port is divided into a plurality of branch passages while extending toward the combustion chamber,
- wherein the thermally insulative support member is located on an intake-air upstream side relative to the branch point,
- wherein, while extending further than the thermally insulative support member, the guide member is divided at a point spaced apart from the thermally insulative support member into branched portions, correspondingly to the plurality of branch passages, and
- wherein at least distal end portions of the branched portions of the guide member are located in the plurality of branch passages.
A thermally insulated insert member disposed in an intake port of a cylinder head of an engine, the thermally insulated insert member comprising:
- a guide member that guides a flow of intake air flowing in the intake port;
- and
- a thermally insulative support member with a shape that can be fitted within the intake port,
- wherein the guide member is formed of a metal and is supported in the intake port via the thermally insulative support member,
- wherein the guide member is a plate, and is arranged such that a plate surface of the guide member extends along a direction in which the intake port extends,
- wherein the plate serving as the guide member partitions the intake port into a first intake passage and a second intake passage,
- wherein the second intake passage is able to be opened and closed by a predetermined valve, and
- wherein the guide member has an intake-air downstream side end portion having a tapered surface on a side facing the first intake passage, the tapered surface inclining so as to be closer to the second intake passage as the tapered surface extends toward an intake-air downstream side.
A thermally insulated insert member disposed in an intake port of a cylinder head of an engine, the thermally insulated insert member comprising:
- a guide member that guides a flow of intake air flowing in the intake port;
- and
- a thermally insulative support member with a shape that can be fitted within the intake port,
- wherein the guide member is formed of a metal and is supported in the intake port via the thermally insulative support member,
- wherein the guide member extends further than the thermally insulative support member toward a combustion chamber of the engine,
- wherein the guide member is a plate, and includes:
- a supported portion supported by the thermally insulative support member;
- and an extended portion extending out from the thermally insulative support member,
- wherein the supported portion has a larger width than the extended portion, and
- wherein the guide member further includes a step portion between the supported portion and the extended portion, and a stress relaxing portion is formed in the step portion.
A thermally insulated insert member disposed in an intake port of a cylinder head of an engine, the thermally insulated insert member comprising:
- a guide member that guides a flow of intake air flowing in the intake port;
- and
- a thermally insulative support member with a shape that can be fitted within the intake port,
- wherein the guide member is formed of a metal and is supported in the intake port via the thermally insulative support member,
- wherein the thermally insulative support member is formed of a tube body with an external shape substantially the same as a shape of the intake port,
- wherein the tube body is a substantially quadrilateral tube body with four corners which are each rounded, and
- wherein the substantially quadrilateral tube body has an intake-air upstream side end with four rounded corners at least one of which has a different radius R from others.
Dependencies are inferred from the claim text.