Internal combustion engines having an external mixture formation and compensation tank for avoiding reignition. An internal combustion engine is provided having an external mixture formation including at least one exhaust system, at least one intake system, the intake system including at least one intake manifold, at least one throttle valve, at least one mixture forming device, at least one compensation tank, and at least one air filter.

A mass-flow throttle for highly accurate control of gaseous supplies of fuel and/or air to the combustion chambers for a large engine in response to instantaneous demand signals from the engine's engine control module (ECM), especially for large spark-ignited internal combustion engines. With a unitary block assembly and a throttle blade driven by a non-articulated rotary actuator shaft, in combination with control circuitry including multiple pressure sensors as well as sensors for temperature and throttle position, the same basic throttle concepts are suited to be used for both mass-flow gas (MFG) and mass-flow air (MFA) throttles in industrial applications, to achieve highly accurate mass-flow control despite pressure fluctuations while operating in non-choked flow. The throttle, in combination with the sensors and ECM, enable detection of backfire events, with the throttle system further being enabled to take operative measures to prevent damage to the throttle components resulting from a backfire event.

A first fuel storage portion is disposed on the upstream side of a fuel supply device of an engine so as to be contiguous with an air-intake passage of the fuel supply device. A blow-back suppression plate for suppressing blow-back from the air-intake passage is disposed between a filter element and the first fuel storage portion of an air cleaner. A suction-back passage is formed such that fuel accumulated in a fuel accumulation portion in the air cleaner is suctioned back through the suction-back passage into the air-intake passage. The suction-back passage allows communication between the fuel accumulation portion in the air cleaner and a suction-back port formed at the downstream-side end of the first fuel storage portion.

A pair of engine mounting brackets for an All-Terrain Vehicle (ATV) is provided. The engine mounting bracket includes the following: a first portion having a mitten shape; a hole in a fingertip portion of the mitten shape; a hole in a thumb portion of the mitten shape; a second portion parallel to the first portion; a middle portion interconnecting the first portion and the second portion at first and second interfaces, respectively, the middle portion being oriented transversely relative to the first and second portions wherein the first portion and the second portion are parallel to each other; and a middle hole in the middle portion just downward of the first interface, wherein the first portion, the second portion, the holes of the first portion and the middle hole being mirror images of each other relative to each engine mounting bracket of the pair though not the middle portions.

A system for facilitating a visual inspection of an All-Terrain Vehicle (ATV) is provided. The system includes a transparent air box cover and an electrical system outputting light from the air box cover lid. The system may include a transparent intake/inlet valve cover lid, a transparent exhaust/outlet valve cover lid, and a transparent cylinder head cover lid.

A pair of engine mounting brackets for an All-Terrain Vehicle (ATV) is provided. The engine mounting bracket includes the following: a first portion having a mitten shape; a hole in a fingertip portion of the mitten shape; a hole in a thumb portion of the mitten shape; a second portion parallel to the first portion; a middle portion interconnecting the first portion and the second portion at first and second interfaces, respectively, the middle portion being oriented transversely relative to the first and second portions wherein the first portion and the second portion are parallel to each other; and a middle hole in the middle portion just downward of the first interface, wherein the first portion, the second portion, the holes of the first portion and the middle hole being mirror images of each other relative to each engine mounting bracket of the pair though not the middle portions.

A mounting bracket for a handlebar of a discontinued All-Terrain Vehicle (ATV) is provided. The mounting bracket includes a U-shape body, wherein a lower portion of both legs of the U-shape body are tilted at an approximately thirty-degree degree angle relative to a remaining portion of the mounting bracket; and a plurality of mounting holes only provided along said lower portions.

A carburetor air fuel mixture device is provided. The device includes a stem ending in a shank; a thread portion along the stem adjacent the shank; a spring slid over the shank; and a O-ring, wherein the spring and the O-ring are dimension so that a circumference of the spring slides in an air fuel mixture opening of a carburetor, and wherein the O-ring seals said air fuel mixture opening.

An intake structure of a vehicle is provided to prevent engine oil from flowing back along a nipple. The structure includes an intake hose which is mounted between an air cleaner and a compressor of a turbo charger. A pocket part, in which the oil comprised in a blow-by gas through the nipple is collected, is formed on the inner sidewall surface of the intake hose. The intake structure prevents the oil existing in the recirculated blow-by gas from flowing into a fresh air nipple.

A backflow preventer, including one or multiple reducing rings that are disposed in a pipeline; the outer edges of the reducing rings are connected to the inner wall of the pipeline; the multiple reducing rings are arranged along the axis of the pipeline; and the actual internal area of the reducing rings are gradually decreased in the axial direction of the reducing rings. Further disclosed is an engine EGR system including the backflow preventer. The backflow preventer can generate, according to different flowing directions in a pipeline, throttling losses of different degrees; when an air flows in a direction (forward direction) in which the actual internal area of the reducing rings decreases, the throttling loss is small; and when then air flows in a direction (reverse direction) in which the actual internal area of the reducing rings increases, the throttling loss is large.