Honda Giken Kogyo Kabushiki Kaisha

Yuji Tsushima

Minoru Ueda

Yutaka Nishikawa

Hiroshi Yamashita

Takaharu Kurosaki

Hiroshi Tanaka

Kenichi Noda

Yoichi Ishibashi

Kenjiro Saito

Ryutaro Yamazaki

Shunji Akamatsu

Yoichi Ishibasi

Yoshihide Namba

A spark-ignition fuel injection internal combustion engine is provided with a sub-combustion chamber in communication with a main combustion chamber. An injecting device intermittently injects mixture gas into the sub-combustion chamber. A volumetric ratio of each of the sub-combustion chamber and the main combustion chamber is set within a range of 1:4 to 3:2.

Fuel injection internal combustion engine with sub-combustion chamber

A fuel injection internal combustion engine is provided with a sub-combustion chamber in communication with a main combustion chamber. A volumetric ratio of the sub-combustion chamber to the main combustion chamber is set within a range of 2:8 to 6:4. A mixture switching valve is provided for injecting the mixture of the fuel and compressed air into the sub-combustion chamber, and a spark plug is arranged in the sub-combustion chamber. The sub-combustion chamber is formed of a material having a thermal conductivity which is lower than that of the material forming the main combustion chamber. The mixture switching valve is a mixture gas injection device including a pressure accumulating chamber adjacent to the sub-combustion chamber and to which pressure air is filled, an opening or closing valve to cause the pressure accumulating chamber to be communicated with the sub-combustion chamber in such a way that they may be opened or closed, and a fuel injecting valve for injecting fuel into the pressure accumulating chamber.

A spark ignition internal combustion engine includes a sub-combustion chamber in which gas mixture with an air-fuel ratio adapted for an operating state of the engine over a wide operating range of the engine is supplied to a combustion chamber. The amount of hydrogen carbide discharged is less and a high efficiency can be attained. The sub-combustion chamber of the internal combustion engine communicates with the main combustion chamber. Gas mixture injecting apparatus intermittently injects gas mixture into the sub-combustion chamber. Ignition devices are arranged in the sub-combustion chamber. The engine is constructed such that the sub-combustion chamber is eccentric in a sideward direction from an extending line of injecting direction of the gas mixture injecting apparatus and communicated with the main combustion chamber. The gas mixture injecting apparatus includes a pressure accumulating chamber adjacent to the sub-combustion chamber and to which pressure air is filled, the opening or closing valve to cause the pressure accumulating chamber to be communicated with the sub-combustion chamber in such a way that they may be opened or closed, and the fuel injecting valve for injecting fuel to the pressure accumulating chamber.

Spark ignition type internal combustion engine with sub-combustion

A highly efficient spark ignition two-cycle internal combustion engine is provided which assures stable and excellent combustion over a wider operation region of the engine. The spark ignition two-cycle internal combustion engine includes a sub-combustion chamber, and a pressure accumulating chamber which is filled with compressed air. A switching valve is arranged for communicating the pressure accumulating chamber with the sub-combustion chamber. A fuel injecting device injects fuel into the pressure accumulating chamber. A control device controls the operations of the switching valve and the fuel injecting device.

Spark ignition two-cycle internal combustion engine with sub-combustion

A two-cycle engine of the spark ignition type is provided wherein a mixture in a combustion chamber can be compressed and self-ignited at least in a low load operation region to effect an activated heat atmosphere combustion. In a transition operation region between the activated heat atmosphere combustion region and an ordinary spark ignition combustion operation region, the mixture can be ignited by a spark ignition at a timing earlier than the spark ignition timing in the ordinary spark ignition combustion operation region to stabilize the combustion condition and eliminate abnormal combustion noise and the harmful effects of heat. A throttle valve opening of a throttle valve manually operated is detected by a throttle valve opening sensor formed from a potentiometer or the like while an engine speed is detected by an engine speed sensor, and they are inputted to a CPU. The CPU operates in accordance with a control graph of FIG. 5 which defines an exhaust air passage opening ratio in response to the engine speed Ne and the throttle valve opening, and transmits to an exhaust control servomotor a drive signal at which the exhaust air passage opening ratio based on the graph is provided. An ignition plug 22 generates, in an ordinary combustion operation region, a spark at 10.degree. (crank angle) prior to the top dead center. When it is discriminated by the CPU that the engine is operating in a transition operation region A between the ordinary combustion operation region and an AR combustion operation region, a spark is generated at 20.degree. prior to the top dead center in response to a control signal of the CPU.

Two-cycle engine of the spark ignition type

A combustion controller for an internal combustion spark ignition type two-cycle engine includes exhaust passage opening ratio adjusting means for adjusting an exhaust passage opening ratio, wherein the exhaust passage opening ratio adjusting means is driven to adjust the exhaust passage opening ratio at a value corresponding to an engine speed and a throttle valve opening ratio at least in a low load operational area. And fresh mixture in a combustion engine is self-fired with a firing timing desirable for operation of the engine. In this engine, the combustion controller includes ignition timing adjusting means for adjusting an ignition timing; abnormal combustion detecting means for detecting abnormal combustion in the combustion chamber; and control means for controlling the exhaust passage opening ratio. The ignition timing at respective values eliminates the abnormal combustion on the basis of the detection signal from the abnormal combustion detecting means.

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Saitama, Japan

Yuji Tsushima