Operating an internal combustion engine system includes feeding a stream of pressurized intake air to a plurality of cylinders in an engine for combustion with a methanol fuel. An engine parameter indicative of at least one of an exhaust NOx level or a change to the exhaust NOx level of the engine is monitored, and water injected into an intake conduit for the engine based on the monitored engine parameter to limit the exhaust NOx level of the engine. Related apparatus and control logic is disclosed.

An internal combustion engine includes an asynchronous injection valve configured to inject water into an intake port when one or more intake valves are closed and a synchronous injection valve configured to inject water into the intake port when the one or more intake valves are open. The asynchronous injection valve and the synchronous injection valve are configured to have injection characteristics that are different between the asynchronous injection valve and the synchronous injection valve.

An internal combustion engine includes an asynchronous injection valve configured to inject water into an intake port when one or more intake valves are closed and a synchronous injection valve configured to inject water into the intake port when the one or more intake valves are open. The asynchronous injection valve and the synchronous injection valve are configured to have injection characteristics that are different between the asynchronous injection valve and the synchronous injection valve.

A controller for an internal combustion engine is configured to calculate a water collection amount based on a temperature of intake air flowing through an intake passage, the water collection amount being an amount of water that collects on a wall surface of the intake passage, cause a water injection valve to inject water to the intake passage when an intake valve is open, and cause the water injection valve to inject water when the intake valve is closed in addition to when the intake valve is open in a case in which the water collection amount is less than a specified value that has been defined in advance.

A control device for an internal combustion engine can prevent misfiring in cylinders of the internal combustion engine. When a deceleration request is issued while the engine load of an internal combustion engine is in a predetermined high-load region, and the vehicle is decelerated so that the engine load transitions from the high-load region to a low-load region to respond to the deceleration request, the control device performs control that continues a fuel supply from injectors of a first cylinder and a fourth cylinder, and cuts a fuel supply from injectors of a second cylinder and a third cylinder. Furthermore, condensed water generated in an intercooler is caused to flow between two guide devices provided at the bottom of a convergence portion of an intake manifold to thereby flow into intake branch pipes of the second cylinder and third cylinder.

A control device for an internal combustion engine can prevent misfiring in cylinders of the internal combustion engine. When a deceleration request is issued while the engine load of an internal combustion engine is in a predetermined high-load region, and the vehicle is decelerated so that the engine load transitions from the high-load region to a low-load region to respond to the deceleration request, the control device performs control that continues a fuel supply from injectors of a first cylinder and a fourth cylinder, and cuts a fuel supply from injectors of a second cylinder and a third cylinder. Furthermore, condensed water generated in an intercooler is caused to flow between two guide devices provided at the bottom of a convergence portion of an intake manifold to thereby flow into intake branch pipes of the second cylinder and third cylinder.

A coolant delivery device for an internal combustion engine, in particular for a motor vehicle, includes a pump, a an activatable electric motor, a shut-off valve, a return line, a heating device, and a common module housing. The pump is configured to deliver liquid coolant, and includes a suction port configured to connect to a tank, and a pressure port for the coolant and which is assigned to the engine. The motor is configured to drive the pump. The valve is assigned to the suction port. The return line is configured to connect to the tank, and includes at least one check valve. At least the pump, motor, valve, heating device, and the at least one check valve together form a delivery module and are positioned in the common module housing.

There is provided a system for reducing fuel consumption and increasing output of an internal combustion engine using an output-wave, the system comprising: an output-wave generation and amplification device configured to generated an amplified output-wave; an output-wave transmitter connected to the output-wave generation and amplification device for transmitting an output-wave to an air intake channel of an internal combustion engine, wherein the output-wave transmitter is inserted into the channel; an output-wave adjuster configured to adjust the output-wave from the output-wave generation and amplification device, wherein the output-wave adjuster is disposed between the output-wave transmission terminal and the output-wave transmitter.

There is provided a system for reducing fuel consumption and increasing output of an internal combustion engine using an output-wave, the system comprising: an output-wave generation and amplification device configured to generated an amplified output-wave; an output-wave transmitter connected to the output-wave generation and amplification device for transmitting an output-wave to an air intake channel of an internal combustion engine, wherein the output-wave transmitter is inserted into the channel; an output-wave adjuster configured to adjust the output-wave from the output-wave generation and amplification device, wherein the output-wave adjuster is disposed between the output-wave transmission terminal and the output-wave transmitter.

A water injection device, in particular of an internal combustion engine, includes a water tank for storing water, a conveying element connected to the water tank for conveying water, at least one water injector connected to the conveying element for injecting water, and a water quality and water fill level detection device for detecting a quality of the water in the water tank and a fill level of the water tank.