A controller for a hydrogen engine is provided. Control circuitry performs, after a stop request for the hydrogen engine, a water reduction process that reduces a proportion of water vapor in exhaust gas. The control circuitry stops the hydrogen engine after operating the hydrogen engine with the water reduction process executed.

A stop control device for an internal combustion engine is structured that stops the engine in a state suitable for starting and that does not cause a crank angle to change after the engine is stopped. A four-cycle internal combustion engine includes an electric valve opening and closing timing control device that sets an opening and closing timing of either or both of an intake valve and an exhaust valve. Stop control of stopping the internal combustion engine is performed when a stop signal for stopping the internal combustion engine is acquired, and post-stop phase control of displacing the opening and closing timing of the valve opening and closing timing control device in either an advancing direction or a retarding direction is performed after the internal combustion engine is stopped by the stop control.

An engine system includes an engine including first and second cylinders, and a control device configured to execute automatic stop of the engine and restart of the engine. The control device includes an acquisition unit configured to acquire a temperature of the engine and a time during the automatic stop of the engine, a fuel cut control unit configured to execute a specific cylinder fuel cut process for stopping supply of fuel to the first cylinder and for supplying fuel to the second cylinder when there is a request to restart the engine, and an injection amount control unit configured to increase a fuel injection amount in the second cylinder as the time during the automatic stop of the engine is longer and as the temperature of the engine is lower, during execution of the specific cylinder fuel cut process.

An internal combustion engine (1) automatically stops when a predetermined idle stop condition is satisfied, and automatically restarts when a predetermined idle stop cancel condition is satisfied. The internal combustion engine (1) is controlled so that when fresh air does not flow into a GPF (18) even if fuel injection is stopped during operation of a vehicle, stop of the fuel injection is permitted even when temperature of GPF (18) is high. That is, the internal combustion engine (1) is controlled so that the stop of the fuel injection is forbidden when the temperature of the GPF (18) is higher than a predetermined temperature T1 and the stop of the fuel injection is allowed when the vehicle stops in a state in which the temperature of the GPF (18) is higher than the predetermined temperature (T1).

A surgical stapler including an anvil, a staple cartridge, and a buttress material removably retained to the anvil and/or staple cartridge. In various embodiments, the staple cartridge can include at least one staple removably stored therein which can, when deployed, or fired, therefrom, contact the buttress material and remove the buttress material from the anvil and/or staple cartridge. In at least one embodiment, the anvil can include at least one lip and/or groove configured to removably retain the buttress material to the anvil until deformable members extending from the surgical staple are bent by the anvil and are directed toward and contact the buttress material.

A system and method for controlling a hydraulic fracturing pumping system is described herein. The method can include stopping an engine coupled to a hydraulic fracturing pumping system including at least one pump by supplying pressure from an accumulator to a hydraulic braking system including a brake. The method can also include starting the engine coupled to the hydraulic fracturing pumping system and releasing the brake.

A controller for a hydrogen engine is provided. Control circuitry performs, after a stop request for the hydrogen engine, a water reduction process that reduces a proportion of water vapor in exhaust gas. The control circuitry stops the hydrogen engine after operating the hydrogen engine with the water reduction process executed.

An ECU makes an opening degree of a throttle valve larger than an opening degree in an idle rotating state of an engine in a rotation drop period during which engine speed drops to zero after combustion of the engine is stopped. Further, the ECU determines that the engine speed is within a predetermined rotation speed range including at least a resonance range of the engine in the rotation drop period, and, in the case where it is determined that the engine speed is within the predetermined rotation speed range, the ECU performs rotation drop processing of temporarily increasing a drop rate of the engine speed.

Methods and systems are provided for expediting EGR purging in a hybrid vehicle during transient operations, such as tip-out to lower load conditions. In response to decreasing engine torque demand, engine fueling is disabled and a motor is used to spin the engine unfueled until a desired LP-EGR rate is achieved. Alternatively, engine operation is maintained with EGR disabled until the desired LP-EGR rate is achieved, and the excess engine torque generated is stored in a system battery.

When a stop request to the engine is issued, it is determined whether or not all of the drive cams are large cams. When it is determined that at least one of the small cams is included in the drive cams, the engine is continued to drive for a while and a switch control for switching the drive cams from the small cams to the large cams is executed within the duration. A self-holding type solenoid is used to switch between the small cams and the large cams. In the switch control, a permission to stop the engine is output at a timing when the pin protrudable section of the final cylinder #2 has elapsed.