A method for diagnosing a crankcase system of an internal combustion engine. A pressure value is captured in a crankcase system. A pressure value of a reference pressure is ascertained or a pressure value to be expected in the crankcase system is modeled. ...

A blowby gas treatment device is configured to discharge blowby gas inside an internal combustion engine (10) to an intake passage (13) inside an intake manifold (12). The blowby gas treatment device includes a blowby gas passage (15), a flow control valve...

In order to prevent an abnormal combustion due to oil, a restriction region (B) is designated on a low-speed and high-load side of an internal combustion engine (1), and an opening of throttle valve (12) is restricted so that an engine operating condition ...

Disclosed is a method for detecting disconnection of a closed breather 18 separating and recovering oil mist from blow-by gas 17 extracted from an engine 1 to return the blow-by gas through a gas return pipe 19 to an intake pipe 5. Under condition of no ex...

A degree of deterioration of oil is obtained from a soot concentration in engine oil. From the degree of deterioration of oil, an allowable upper limit value of compressor outlet temperature is obtained (Step ST1). An allowable upper limit supercharging pr...

Through the action of a turbocharger (10), if the pressure of the section of the air intake path (3) of an internal combustion engine (1) that is on the downstream side of a compressor wheel (12) becomes higher than the pressure of the section on the upstr...

The method involves estimating dilution rate (C) of fuel based on an operating mode of an internal combustion engine. Dilution rate variation (dC) is calculated (120) at every instant from a set of parameters apart from a post-injection fuel regeneration p...

An exhaust gas purification device for an engine has a filter which is provided in an exhaust passage of the engine, collects particles in exhaust gas, and is subjected to Active Regeneration for burning and removing the collected particles by heating, and...