A method for controlling the operation of a vehicle prime mover based on the engagement status of one or more safety restraints of the vehicle. In various implementations the method comprises monitoring, via a RPM controller of the vehicle, an operational status of vehicle, monitoring, via the RPM controller, the engagement status at least one passenger safety restraint of the vehicle, and limiting, via the RPM controller, a rotational speed, e.g., revolutions per minute (RPM) of one or more prime mover of the vehicle when the vehicle is in a On operational status and the at least one safety restraint is in a disengaged status.

A motor-driven supercharger includes a compressor, an electric motor, and a controller. The compressor is arranged in the intake passage of the engine. The electric motor drives the compressor. The controller is configured to start detection of the rotational position of the electric motor at least on the condition that a brake operation amount, which is the operation amount of a brake operation member of the vehicle, becomes less than or equal to a threshold. The controller is configured to start forced induction with the electric motor when an acceleration operation amount, which is the operation amount of an acceleration operation member of the vehicle, becomes more than or equal to a threshold.

A PCM (50) that is an engine control device functions to acquire a master vac negative pressure which is the negative pressure of a stabilized chamber of a master vac (126) which amplifies a brake pedal depressing force applied to a brake pedal (102), and also acquire a brake working fluid pressure that is a braking hydraulic pressure produced by a master cylinder (144) in accordance with the brake pedal depressing force amplified by the master vac (126), and in a case where both accelerator pedal (104) and a brake pedal (102) are depressed or actuated simultaneously, determine whether or not it is necessary to decrease engine output based on such master vac negative pressure and brake working fluid pressure to execute the output decreasing control for decreasing the engine output.

An engine system includes an engine, a main combustion chamber formed by a cylinder head and a piston, an auxiliary chamber formed with a communicating hole communicating with the main combustion chamber, an injector configured to inject fuel into the main combustion chamber, an ignition plug provided to the auxiliary chamber and configured to ignite a mixture gas inside the auxiliary chamber, an accelerator opening sensor, and a control device. The control device controls the injector so that an air-fuel ratio of the mixture gas inside the auxiliary chamber becomes a first air-fuel ratio when an engine load range is a first range, and the air-fuel ratio of the mixture gas inside the auxiliary chamber becomes a second air-fuel ratio leaner than the first air-fuel ratio when the engine load range is a second range where the engine load is higher than in the first range.

A method is provided for controlling engine speed of a drive engine of a utility vehicle having a drivable loading apparatus. The method includes detecting or predicting a driving movement of the loading apparatus, and requesting an increase of engine speed if the movement of the loading apparatus is predicted or detected.

A supplemental fuel system includes a supplemental fuel tank, an electronic valve, a voltage sensor, and a controller. The supplemental fuel tank is configured to store a supplemental fuel configured to supplement a primary fuel used by an engine. The electronic valve is configured to be positioned between the supplemental fuel tank and an air supply system for the engine. The voltage sensor is configured to acquire voltage data from a power supply indicative of a voltage of the power supply. The power supply is configured to receive power from an alternator driven by the engine. The controller is configured to control the electronic valve such that the electronic valve is (i) closed in response to the voltage being less than a voltage threshold and (ii) open or openable in response to the voltage being greater than the voltage threshold.

Engine controllers and control schemes that facilitate skip fire engine operation in conjunction with use power take-off devices are described. In one aspect, a skip fire mode is exited when the power take-off unit is engaged and the current torque request exceeds a torque threshold. In some embodiments, the exit is delayed when the temperature of an after treatment system is below a designated temperature threshold. In another aspect, the engine transitions to the skip fire mode when the power take-off unit disengages. In some embodiments, exiting is conditioned on the current torque request being less than a torque threshold. In some embodiments, the transition is made immediately, whereas in others the transition only occurs when the power take-off unit is not reengaged for a period of time or is further conditioned on determining that the power take-off unit is likely to remain disengaged for the period of time.

A throttle assembly for an engine may include a remote throttle lever, a sensor, and a terminal. The remote throttle lever may be coupled physically to a user input device and operable to be moved under control of the user input device. The sensor is configured to detect a position of the remote throttle lever and generate an output signal indicative of the position of the remote throttle lever. The terminal configured to provide the output signal to a controller of the engine.

A vehicle control device includes a memory configured to store relationship definition data that defines a relationship between a state of a vehicle and an action variable, which is a variable relating to an operation of electronic equipment in the vehicle, and a processor. The processor is configured to execute acquisition processing of acquiring a detection value of a sensor and driving preference information, operation processing of operating the electronic equipment, reward calculation processing of providing a greater reward when a characteristic of the vehicle satisfies a criterion than when the characteristic of the vehicle does not satisfy the criterion, and update processing of updating the relationship definition data. The processor is configured to, based on update mapping, output the relationship definition data updated to increase an expected return on the reward when the electronic equipment is operated in compliance with the relationship definition data.

A method of controlling a turbocharged engine system including customized and selective operation of a turbocharger bypass valve to modulate air pressure through an intake system of the engine to achieve certain desirable auditory feedback, which are deliberately generated through control of engine systems. Additionally, the method may include receiving a user input corresponding to one of a plurality of turbocharger modes. Further, the method may include, in response to receiving the user input, determining an intake air pressure of an intake manifold of the turbocharged engine system. Still further, the method may include comparing the intake air pressure of the intake manifold with a predetermined threshold. Even further, the method may include adjusting a position of a bypass valve based on the turbocharger mode corresponding to the user input and the intake air pressure in comparison to the predetermined threshold. Related apparatuses, systems, techniques and articles are also described.