31results about "Engine viscosity" patented technology

Various methods for inferring oil viscosity and / or oil viscosity index in an internal combustion engine are provided. In one aspect, a new control method comprises: after engine shutdown, learning engine oil viscosity based on time to drain the oil back into an engine sump and oil temperature during the draining, and correcting an engine operating parameter based on the learned oil viscosity.

The present invention relates to a method (and corresponding system) of reducing fuel consumption in a diesel engine (300) when operating at less than full power, the method comprising the step of: adjusting (101) a viscosity of a system oil (301) from the engine (300) resulting in a modified system oil (301′), where the viscosity is adjusted so that the mechanical efficiency of the engine (300) is increased when the modified system oil (301′) is provided to the engine (300) and wherein the step of adjusting is done on the basis at least one parameter representing an actual load of the engine (300) and a viscosity parameter of the system oil (301).In this way, the mechanical efficiency of the engine when operating at less than full speed / at partial speed is increased. This reduces the fuel consumption of a diesel engine and reduces the emissions of a diesel engine.

A controller sets a target hydraulic pressure from a required hydraulic pressure of a hydraulically operated device according to an operating condition of an engine. The controller causes an oil control valve to perform feedback control of the discharge amount of an oil pump in such a manner that an actual hydraulic pressure detected by a hydraulic pressure sensor coincides with the target hydraulic pressure. The controller executes feedback control after executing fixed duty control of setting a duty ratio of the oil control valve to a fixed duty ratio for a predetermined period of time from start of the engine.

A diagnostic system for a lubrication circuit of an internal combustion engine of a vehicle. The system includes a viscometer for detecting the viscosity of a lubricating liquid of the lubrication circuit, a temperature sensor for detecting the temperature of the lubricating liquid, and a control unit to acquire the state of the lubricating liquid, given by the viscosity detected for a given lubricating liquid condition, which includes the lubricating liquid temperature and the date of last replacement of the lubricating liquid, and for a given condition of use of the engine, and to assess the state of the lubricating liquid by comparing the detected viscosity of the lubricating liquid with the viscosity reference values stored in the database in the same or similar condition of lubricating liquid temperature, date of last replacement of the lubricating liquid and use of the engine.

The invention discloses an online safety early warning system for a condenser oil system, which includes an online monitoring device, a workflow engine, a management server, industrial inspection equipment, and a communication device; the workflow engine is used to establish a workflow model and define roles, The process controller is used to realize process control; the online monitoring equipment is used to extract some oil samples from the oil system for testing and obtain various monitoring parameters; the management server performs monitoring parameters collected by the online monitoring equipment according to the preset workflow model Processing, the original monitoring parameters and processed results are stored in the lubricating oil ledger database, lubricating oil basic database, lubricating oil comparison database, lubricating oil evaluation database, and expert diagnosis database. The invention can perform visual intelligent safety pre-control on four aspects of lubricating oil ferrogram, viscosity, water content and temperature, reduce the operation and maintenance cost of industrial equipment in factories, improve production efficiency, and avoid serious lubrication failures and mechanical failures.

Systems and methods of monitoring lubrication of a gear assembly during operation of a machine (102) provide for receiving at a control system (120), a signal from a sensor (118) indicative of a valueobtained by the sensor (118) for an electrical property of a circuit (300) crossing the gear assembly (102) operably coupled to the machine (102), ascertaining whether the value for the electrical property corresponds to a warning level for a condition of the lubricant film (220), and outputting a control command (220) when the value for the electrical property corresponds to the warning level for the condition of the lubricant film.

A method for operating an internal combustion engine wherein the internal combustion engine to be operated is supplied with lubricating oil via an oil circuit. A measurement value of a total base number and / or a measurement value of the viscosity of the lubricating oil currently used in the oil circuit for the lubrication is detected. Dependent on the established measurement value of the total base number and / or dependent on the established measurement value of the viscosity an exchange oil quantity for the oil circuit is determined. Currently used lubricating oil to an extent corresponding to the exchange oil quantity is removed from the oil circuit. New lubricating oil to an extent corresponding to the exchange oil quantity is supplied to the oil circuit.