An internal combustion engine having: at least one piston-cylinder unit, a turbocharger having an exhaust gas turbine, a catalytic converter connected between the at least one piston-cylinder unit and the exhaust gas turbine, and a control device, wherein the control device is designed to control a fluid-delivery device such that, when the internal combustion engine is in a state in which no combustion and/or ignition takes place in the at least one piston-cylinder unit, the fluid-delivery device delivers fuel-air mixture through the catalytic converter.

An engine includes an EGR device and a water-cooled heat exchanger. The water-cooled heat exchanger is provided on a downstream side of an EGR gas-introduction portion of an intake passage into which EGR gas is to be introduced and exchanges heat with gas flowing in the intake passage. A control device is programmed to execute condensed water-suppression control that supplies coolant having a temperature higher than the temperature of the gas heat-exchanged in the water-cooled heat exchanger to the water-cooled heat exchanger while a hybrid vehicle is traveling in a state in which the engine is stopped.

Systems and methods for stopping rotation of an engine of a vehicle in a requested or desired crankshaft window are described. In one example, spark timing of one or more engine cylinders is adjusted responsive to an actual total number of cylinder events occurring after an engine stop request is generated.

A method is described for operating an electric fuel pump constituting a low-pressure pump in a fuel supply system for an internal combustion engine, having a high-pressure reservoir and a high-pressure pump, of a motor vehicle. The electric fuel pump is operated at least temporarily, during a time period during which the internal combustion engine is switched off during operation of the motor vehicle, with a minimum value for a control application variable for the electric fuel pump.

A method for operating an internal combustion engine having a high-pressure fuel injection system stops and starts the engine independently of an intervention by the motor vehicle operator and then restarted. A high-pressure fuel pump is used to pump fuel to a high-pressure reservoir to which at least one high-pressure fuel injector is connected in order to inject fuel into the at least one cylinder of the internal combustion engine. Fuel pressure can be adjusted on the high-pressure side using an electrically actuated pressure reduction valve (PDV).

On satisfaction of conditions to shift to scavenging control in response to a stop request of an engine, a hybrid vehicle performs engine power limitation control that limits the power output from the engine with an engine upper limit power as an upper limit.

A method for extended driving mode of a hybrid vehicle mounted with a cylinder of an engine deactivation (CDA) device may include controlling to switch cylinders of an engine into an idle state through a variable valve control mechanism in an engine stop mode.

A method for fault diagnosis in an electronic control unit (ECU) of an engine fuel injection system. The method includes keeping the ECU and the engine fuel injection system at a set of pre-defined conditions, measuring an electrical current consumption of the ECU, and detecting a status of the ECU based on the measured electrical current consumption. Keeping the ECU and the engine fuel injection system at the set of pre-defined conditions includes switching the ECU on by switching the engine fuel injection system on, and keeping the engine fuel injection system at a not-running state. Detecting the status of the ECU based on the measured electrical current consumption includes detecting a normal status responsive to the measured electrical current consumption being in a normal electrical current range, detecting a first hardware defect in the ECU responsive to the measured electrical current consumption being in a first electrical current range, and detecting a second hardware defect in the ECU responsive to the measured electrical current consumption being in a second electrical current range.

A carbon monoxide shutoff system for an engine of a portable electrical generator has a carbon monoxide gas sensor, a microcontroller, and an output indicator. The carbon monoxide gas sensor generates an output electrical current proportional to a detected concentration of ambient carbon monoxide. The microcontroller has an input connected to the carbon monoxide gas sensor, and an output connected to an operational control of the engine. A deactivation signal generated by the microcontroller in response to detection of a deactivation condition is based upon the output electrical current from the carbon monoxide gas sensor matching predefined value and duration thresholds. The deactivation signal is operative to stop the engine.

The invention provides a system for ventilation of a crankcase (217) of an internal combustion engine, the system comprisingan air inlet guide (203, 212) adapted to guide air to at least one cylinder (220) of the engine,a closed circuit conduit (209) for guiding crankcase gas from the crankcase (217) to the air inlet guide (203, 212),wherein the system comprises gas detection means (2181, 2182, 2183) positioned in the air inlet guide (203, 212), for detecting crankcase gas in the air inlet guide.