The present invention pertains to a method of determining a lubrication oil condition of a stationary gas engine comprising the steps of retrieving a lubrication oil temperature information and retrieving a lubrication oil level information from a lubrication oil level sensor, wherein the lubrication oil level sensor is a capacitance sensor, and a step of normalizing a lubrication oil level information over the lubrication oil temperature information.

A blow-by gas treatment device causes blow-by gas in a space defined by a cylinder head and a head cover in an internal combustion engine to flow back into an intake pipe. The blow-by gas treatment device includes a pipe joint and a blow-by gas pipe connected to the intake pipe. The pipe joint includes a basal end connected to the head cover, a distal end, a sensor-connected part connected to the pressure sensor, and a constriction located closer to the basal end than the sensor-connected part. The blow-by gas pipe is connected to a position of the pipe joint closer to the distal end than the sensor-connected part.

A blow-by gas treatment device includes a first blow-by gas pipe, a second blow-by gas pipe, a first pipe joint located on a first head cover, the first blow-by gas pipe being connected to the first pipe joint, a second pipe joint located on a second head cover, the second blow-by gas pipe being connected to the second pipe joint, a first union located on the first pipe joint, a second union located on the second pipe joint, and a pressure sensor connected to the first pipe joint by the first union and connected to the second pipe joint by the second union.

A control device controls an internal combustion engine including: an elastic wave sensor arranged and configured to output a signal responsive to the strength of an acoustic emission wave produced at a sliding portion; and a variable oil pump. The control device is configured to execute an oil pressure control such that the oil pressure approaches a target oil pressure according to an engine operating condition. This oil pressure control includes a first pressure-increase processing executed where an AE correlation value correlated with the strength or occurrence frequency of the acoustic emission wave detected by the elastic wave sensor is greater than a first threshold value. The first pressure-increase processing increases the target oil pressure associated with a first engine operating condition present when the AE correlation value becomes greater than the first threshold value, as compared to when the AE correlation value is not greater than that.

An apparatus and method for controlling an electric oil pump with a pump control signal generated by an electronic control unit (ECU) of a vehicle. The pump control signal has a variable drive time portion during which the electric oil pump is actuated to supply oil to an engine of the vehicle and a variable cycle time defining a frequency of the pump control signal.

An oil level sensor cover according to an embodiment of the present disclosure may be mounted below an engine oil pan to protect an oil level sensor that measures an oil level. The oil level sensor cover may be formed with plates of predetermined sizes, including an upper surface and a lower surface opposite to the upper surface, wherein a plurality of seating portions and a plurality of hook are formed on the upper surface. An engine according to another embodiment of the present disclosure comprises the above-described oil level sensor cover according to an embodiment of the present disclosure, an engine oil fan, and an oil level sensor mounted below the engine oil fan to measure the oil level. The oil level sensor cover can be separated from or coupled to the oil level sensor without the use of a separate tool.

An integrated heater and pressure sensor assembly for a positive crankcase ventilation (PCV) system for a vehicle internal combustion engine includes a heater assembly configured to fluidly couple a PCV/makeup air (MUA) line and a vehicle air induction system line, the heater assembly configured to heat fluid passing into and out of the PCV/MUA line, and a pressure sensor assembly integrated directly into the heater assembly, the pressure sensor assembly configured to sense pressure pulsations in the PCV/MUA line.

A method and a device for monitoring the functioning of a crankcase ventilation system of an internal combustion engine, crankcase ventilation gas being supplied to an intake line of the internal combustion engine via at least one crankcase ventilation line from the crankcase via an oil separator and a crankcase pressure regulating valve. An immediate surrounding environment of the internal combustion engine is monitored by at least one sensor that is sensitive to crankcase ventilation gas or to at least one crankcase ventilation gas component for the occurrence of crankcase ventilation gas, and that, if a presence of crankcase ventilation gas is determined, an informative or warning message is produced.

An oil change system. The oil change system includes a plurality of fluid systems and a control circuit. Each of the fluid systems is couplable to a quick fit valve of a vehicle. The control circuit is coupled to the plurality of fluid systems, comprises a processing circuit, and is configured to control delivery of a predetermined volume of a fluid to the quick fit valve of the vehicle.

A lubrication system for an internal combustion engine and a method of monitoring the lubrication system are described. The lubrication system generally circulates lubricant from a sump (i.e., a reservoir), through a filtration system, to the internal combustion engine, and back to the sump. The lubrication system includes a controller that monitors a dielectric constant of the lubricant and a viscosity of the lubricant. Based on the dielectric constant, the controller can determine whether the lubricant flowing through the lubrication system is new lubricant (e.g., recently replaced lubricant) or old lubricant (e.g., lubricant that has degraded enough to be distinguished from new lubricant). If old lubricant is identified, the viscosity of the lubricant is compared against threshold viscosities to dynamically determine when the lubricant requires replacement.