A side-by-side off-road utility vehicle comprising a vehicle operational status switch for controlling the operational status of the vehicle, a side-by-side seating structure, a plurality of safety restraint devices operable to retain one or more vehicle passenger in the side-by-side seating structure, and a prime mover RPM controller. The prime mover RPM controller operable to output commands to the one or more prime mover of the vehicle to limit a rotational speed of the prime mover(s) when the vehicle is in an On operational status and a selected one or more of the one or more safety restraints is in a disengaged status.

A method, device and system for detecting and counteracting a runaway condition in a diesel engine system. The diesel engine system includes an inlet for supplying combustion air to a diesel engine, and an exhaust for relieving the diesel engine from exhaust gas. The diesel engine system further includes an exhaust gas recirculation system for selectively allowing exhaust gas from the exhaust to enter the inlet. A first gas flow path actuator is included in the exhaust gas recirculation system, and a second gas flow path actuator is included in the exhaust. The method, as performed by the system, comprises detection of an actual or potential runaway condition, and in response thereto deprives the diesel engine of oxygen. Depriving of oxygen is performed by opening the first gas flow path actuator and closing the second gas flow path actuator to cause stalling of the diesel engine. The depriving is accomplished by maximizing recirculation of exhaust gasses to the engine and increasing pressure drop over the exhaust for a first predetermined period of time.

A control device for an onboard engine is configured to control the oil discharge pressure of an oil pump and execute, when determining that there may be an abnormality in the control of the oil discharge pressure, a change process that increases the target discharge pressure to a value that is greater than that before it is determined that there may be an abnormality in the control. When a discharge pressure sensor value in a situation in which the discharge pressure is being controlled based on the target discharge pressure increased through execution of the change process does not become greater than or equal to a discharge pressure threshold, the control device sets an upper limit for the engine rotation speed and increases the upper limit as the discharge pressure sensor value increases.

A method for limiting a revolution speed of an internal combustion engine (E) of a sports car, the method comprising a first step (Step 1) of acquiring a nominal speed value of said internal combustion engine, a second step (Step 2) of measuring a revolution speed of said internal combustion engine, when (CHK) a measured revolution speed of said internal combustion engine has reached (yes) an activation speed approximately equal to said nominal speed, the method comprising a third step (Step 3) of setting a predetermined initial torque value (a) to be delivered by said internal combustion engine and simultaneously a fourth step (Step 4) of carrying out a feedback control of a torque delivery of said internal combustion engine.

An internal combustion engine kart implementing an accelerator cable connecting an accelerator pedal and an operating lever rotating an air inlet flap controlling the amount of air entering the engine, and a controller receiving at least one control signal emitted by a remote transmitter. The kart includes a movable stop acting on the operating lever so as to change its range of movement and consequently a level of maximum opening of the air inlet flap. The movement of the movable stop depends on the control signal.

There is provided an engine rotation speed control device for performing over-speed rotation prevention control to decrease an engine rotation speed if the engine rotation speed exceeds a first upper limit rotation speed. If a gear position of a transmission is a neutral state or an intermediate neutral state in which predetermined gears are not engaged with each other in the middle of a gear change operation of the transmission, a second upper limit rotation speed which is lower than the first upper limit rotation speed is set. If the engine rotation speed at the time when the gear position of the transmission is the neutral state or the intermediate neutral state is higher than the second upper limit rotation speed, the over-speed rotation prevention control is performed.

Herein a hand-held power tool comprising an internal combustion engine (4) is disclosed. The hand-held power tool comprises, a working tool (6), a centrifugal clutch (8), and a control system (10). The internal combustion engine (4) has a clutch-in speed (C) above which the internal combustion engine (4) drives the working tool (6). A speed limitation controller (14), is configured to limit an engine speed at a limitation speed below the clutch-in speed (C). The control system (10) is configured to calculate an integral of the rotational speed of the internal combustion engine (4), and to deactivate the speed limitation controller (14) after the integral reaches an integration limit value, such that the internal combustion engine (4) is rotatable above the limitation speed (L) to drive the working tool (6) via the centrifugal clutch (8).

A method for controlling an emergency unit of an internal combustion engine including the following steps: inputting a threshold value for an overspeed of the engine; detecting a second rotational speed of the engine with a second rotational speed sensor; checking the plausibility of the second rotational speed. The plausibility checking includes the following steps: inputting a first rotational speed detected by a first rotational speed sensor of an engine control unit; calculating a difference between the second rotational speed and the first rotational speed; comparing the difference with a recorded threshold value for the difference; in the event that the difference is smaller than the threshold value for the difference, emitting a plausibility signal. After receipt of the plausibility signal, the method includes inputting the second rotational speed; and using the second rotational speed for an activation process of the emergency unit according to the overspeed.

A side-by-side off-road utility vehicle comprising a vehicle operational status switch for controlling the operational status of the vehicle, a side-by-side seating structure, a plurality of safety restraint devices operable to retain one or more vehicle passenger in the side-by-side seating structure, and a prime mover RPM controller. The prime mover RPM controller operable to output commands to the one or more prime mover of the vehicle to limit a rotational speed of the prime mover(s) when the vehicle is in an On operational status and a selected one or more of the one or more safety restraints is in a disengaged status.

A smart governor system that intercepts and adjusts throttle commands when certain criteria are met based on vehicle operations and a user-selected transmission mode. The governor, when engaged, reduces a throttle command in order limit engine and/or ground speed.