原始名称记载: KAWASAKI MOTORS, LTD.

An internal combustion engine for a vehicle includes: a crankshaft; a balancer shaft that is connected to the crankshaft and is rotated by rotational power transmitted from the crankshaft; a crankcase including a crank chamber that accommodates the crankshaft and the balancer shaft; and a filler that fills a space around the balancer shaft in the crank chamber and is a member different from a wall surrounding the crank chamber.

An engine includes: an engine body; an exhaust pipe through which an exhaust gas discharged from the engine body flows; and a downstream device including a downstream inlet to which the exhaust pipe is connected. The engine body includes a first cylinder, a second cylinder, a first exhaust port that communicates with the first cylinder, and a second exhaust port that communicates with the second cylinder. The exhaust pipe includes a first exhaust pipe connected to an outlet of the first exhaust port, and a second exhaust pipe connected to an outlet of the second exhaust port. The downstream inlet includes a first inlet to which a downstream end of the first exhaust pipe is connected, and a second inlet to which a downstream end of the second exhaust pipe is connected. A cross section of the downstream inlet has a point-symmetric shape around an axis extending along a connection direction of the downstream inlet and the exhaust pipe to allow the downstream device to connect to the exhaust pipe when the downstream device is in both a first posture and a second posture that is rotated 180 degrees from the first posture.

A combustion abnormality monitoring device for a two-stroke engine includes: a detection unit configured to detect combustion abnormality that is in-cylinder combustion triggered at a timing different from the timing of ignition; and a control unit configured to control the condition inside the cylinder when the detection unit detects combustion abnormality.

An intake structure for an internal combustion engine of a vehicle includes: an intake passage structural body defining an intake passage which is connected to the internal combustion engine and through which intake air to be supplied to the internal combustion engine flows, the intake passage structural body including an intake port and a recess which is located between the intake port and the internal combustion engine and is recessed toward the intake passage; a first injector located between the recess and the internal combustion engine and connected to the intake passage structural body so as to inject fuel into the intake passage; and a second injector located inside the recess and connected to the intake passage structural body so as to inject the fuel into the intake passage.