A non-transitory computer-readable medium having a NOx sensor purification instructions for a NOx sensor causes: an on-vehicle electronic computer mounted in the vehicle, when it comes to a predetermined purification time, to execute a start procedure to send a start command to perform a purification control to the control unit; and control unit, in response to the start command, to execute a purification procedure to perform the purification control which causes the current flowing in the reference pump cell from the reference pump current to be a purification pump current, which is set to a current value larger than the reference pump current.

A non-transitory computer-readable medium having a NOx sensor purification instructions for a NOx sensor causes: an on-vehicle electronic computer mounted in the vehicle, when it comes to a predetermined purification time, to execute a start procedure to send a start command to perform a purification control to the control unit; and control unit, in response to the start command, to execute a purification procedure to perform the purification control which causes the current flowing in the reference pump cell from the reference pump current to be a purification pump current, which is set to a current value larger than the reference pump current.

A system according to the principles of the present disclosure includes a start-stop module, a pre-ignition risk module, and a cooling control module. The start-stop module stops and restarts an engine independent from an input received from an ignition system. The pre-ignition risk module monitors a risk of pre-ignition when the engine is restarted and generates a signal based on the risk of pre-ignition. The cooling control module controls a cooling system to circulate coolant through the engine when the engine is stopped in response to the risk of pre-ignition.

A system according to the principles of the present disclosure includes a start-stop module, a pre-ignition risk module, and a cooling control module. The start-stop module stops and restarts an engine independent from an input received from an ignition system. The pre-ignition risk module monitors a risk of pre-ignition when the engine is restarted and generates a signal based on the risk of pre-ignition. The cooling control module controls a cooling system to circulate coolant through the engine when the engine is stopped in response to the risk of pre-ignition.

The sensor control unit is used for a gas sensor disposed in an exhaust pipe in an engine as an internal combustion engine of a vehicle. The gas sensor includes a sensor cell having an exhaust gas electrode, an atmosphere side electrode and a solid electrolyte, and a heater that heats the sensor cell. The sensor control unit includes a heater control unit that controls a heater to heat a sensor cell. The heater control unit heats the sensor cell to be at an operation control temperature during the combustion operation of the engine and heats the sensor cell to be at an operation stop control temperature which is higher than the operation control temperature.

A fault diagnosis device for an exhaust pipe fuel injector that diagnoses a normality or an abnormality of the exhaust pipe fuel injector which injects a fuel according to an instructed fuel injection amount, includes: a storage unit which stores a regeneration duration and an instructed fuel injection amount in the regeneration duration; a calculation unit which calculates an instructed fuel injection amount per unit time in the regeneration duration; and a fault diagnosis unit which diagnoses that the exhaust pipe fuel injector is abnormal when the instructed fuel injection amount per unit time in the regeneration duration exceeds a fault threshold, and diagnoses that the exhaust pipe fuel injector is normal when the instructed fuel injection amount per unit time in the regeneration duration does not exceed the fault threshold.

There is provided the diagnostic device for a sensor which is arranged in an exhaust passage of an internal combustion engine and detects a particulate matter amount in exhaust, the diagnostic device including a time-rate-of-change calculation unit which calculates a time rate of change of the particulate matter amount detected by the sensor during a period in which a fuel injection amount of the internal combustion engine is equal to or less than a predetermined injection amount threshold, and an abnormality determination unit which determines an abnormality of the sensor based on the time rate of change of the particulate matter amount calculated by the time-rate-of-change calculation unit.

A shovel enabled to set an engine revolution speed to revolution speeds including a revolution speed for a running operation and a revolution speed for an idling running operation that is lower than the revolution speed for the running operation includes an engine provided as a driving source of the shovel, an operating part configured to be driven by a driving force of the engine, an operation component configured to operate the operating part, a detecting device configured to detect a position of a movable portion of an operator and a position of the operation component, an operation determining part configured to determine a positional relationship between the movable portion and the operation component, and a control part configured to set the engine revolution speed of the engine based on the positional relationship between the movable portion and the operation component that is determined by the operation determining part.

A shovel enabled to set an engine revolution speed to revolution speeds including a revolution speed for a running operation and a revolution speed for an idling running operation that is lower than the revolution speed for the running operation includes an engine provided as a driving source of the shovel, an operating part configured to be driven by a driving force of the engine, an operation component configured to operate the operating part, a detecting device configured to detect a position of a movable portion of an operator and a position of the operation component, an operation determining part configured to determine a positional relationship between the movable portion and the operation component, and a control part configured to set the engine revolution speed of the engine based on the positional relationship between the movable portion and the operation component that is determined by the operation determining part.

A pressure sensor which detects a combustion pressure of an engine includes: a contact part which is in direct or indirect contact with a casing of the engine when the pressure sensor is attached to the engine; and a pressure detection unit which detects the combustion pressure and outputs a signal corresponding to the combustion pressure, wherein the pressure detection unit includes a pressure detection element which detects the combustion pressure and outputs a signal, and a circuit unit which converts the signal obtained from the pressure detection element into a signal corresponding to the combustion pressure, and the pressure detection unit is provided at a location positioned more inside the engine than the contact part when the pressure sensor is attached to the engine.