It is an object of this invention to restrain blow-by gas from reaching a catalyst during fuel cutoff, and protect the catalyst while coping with an increase in oil dilution amount resulting from the use of alcohol fuel, in an internal combustion engine th...

A saddle type vehicle (1) is equipped with an engine (4) which is capable of burning a fuel which is a mixture of alcohol and gasoline at an arbitrary mixing ratio. The saddle type vehicle (1) includes an engine temperature detection means (72) for detecti...

When alcohol mixing fuel is supplied to an internal combustion engine, an intake air flow rate Ga is detected (Step 1005), and a basic amplitude amount ± of an upstream target air-fuel ratio abyfr corresponding to this detected intake air flow rate Ga is ...

The method involves providing an injector of a fuel system, which is actuated for injecting a fuel quantity into a combustion chamber during injection duration. The injection valve for injecting the fuel is actuated to perform partial stroke operation. Ind...

A control device for an internal combustion engine is provided, which can carry out favorable injection amount feedback control even when a fuel property changes. A cylinder internal pressure sensor (16) that detects a cylinder internal pressure is include...

In a control device for an internal combustion engine, the operating range of the internal combustion engine is divided into a plurality of subranges, and one of the subranges is set as a reference range (S14). A ratio between a feedback correction factor ...

A detection apparatus (30) estimates and detects an alcohol concentration of a fuel based on an output signal of a pulser rotor (50) to eliminate the necessity for a sensor for detecting an intake air mass. A first crank angular speed (É1) within a first ...

The types of gasolines having different distillation characteristics and various compositions are identified accurately and rapidly. A pulse voltage is applied for a predetermined time to a liquid type identifying sensor heater including a heater and an id...