CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority from Japanese Patent Application No. 2019-177046 filed on Sep. 27, 2019, the entire contents of which are hereby incorporated by reference.

BACKGROUND

The technology relates to an engine provided with a partition wall that separates an intake port into two channels.

For internal combustion engines such as automobile engines, a technique is conventionally known which enhances a gas flow in a combustion chamber to improve combustion efficiency of fuel. For example, a method of generating a vortex flow called “tumble flow” or “swirl flow” and enhancing this vortex flow is known as such a method of enhancing a gas flow. The tumble flow is a swirling flow that swirls around an axis orthogonal to a central axis of a cylinder in an axial direction. The swirl flow is a swirling flow that swirls around the central axis of the cylinder in an axial direction.

The engine is generally provided with a cylinder head including an intake port and an intake manifold including an intake passage that communicates with the intake port. To generate a vortex flow and enhance the gas flow, the engine is provided with a partition wall member that separates at least one of the intake port or the intake passage into two channels and an intake control valve that controls a flow rate of the intake gas that passes through each of the two channels. When the flow rate of the intake gas is small, the intake control valve blocks the intake gas flowing into one of the two channels to thereby increase a flow speed of the intake gas that passes through the other channel of the two channels. This enhances the gas flow in the combustion chamber.

Japanese Unexamined Patent Application Publication No. 2018-021512 discloses an engine provided with a partition wall that extends from an intake channel of an intake manifold to an intake port of a cylinder head and partitions part of each of the intake channel and the intake port. A gasket is integrally provided in a partition wall. The gasket is sandwiched between the cylinder head and the intake manifold.

Japanese Unexamined Patent Application Publication No. 2012-188980 discloses an intake manifold provided with an intake pipe for which a partition wall for partitioning the intake pipe into two channels is provided over substantially the whole length. Japanese Unexamined Patent Application Publication No. 2007-113482 discloses a resin intake manifold for which a partition wall for partitioning an intake port into two regions is integrally provided.

SUMMARY

An aspect of the technology provides an engine. The engine includes a cylinder head, an intake manifold, and a partition wall. The cylinder head includes an intake port communicating with a combustion chamber. The intake manifold is fixed to the cylinder head and includes an intake passage communicating with the intake port. The partition wall separates at least part of the intake port into a first channel and a second channel. The partition wall includes a partition wall member extending from the intake port to the intake passage and fixed to an inner wall of the intake port and an inner wall of the intake passage.

