A supplemental fuel system includes a supplemental fuel tank, a first pressure regulator, a second pressure regulator, and a nozzle. The supplemental fuel tank is configured to store a supplemental fuel at a first pressure. The first pressure regulator is configured to reduce the first pressure of the supplemental fuel received from the supplemental fuel tank to a second pressure. The second pressure regulator is configured to reduce the second pressure of the supplemental fuel received from the first pressure regulator to a third pressure. The nozzle is configured to be positioned (i) downstream of the second pressure regulator and (ii) within a conduit of an air supply system for the compression-ignition engine. The nozzle is configured to receive a flow of the supplemental fuel and provide the supplemental fuel to air flowing though the conduit.

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 closed in response to the voltage being less than a voltage threshold indicating that the engine is not operating and open/openable in response to the voltage being greater than the voltage threshold indicating that the engine is operating.

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.

A supplemental fuel system includes a supplemental fuel tank, an electronic lock off valve, a temperature sensor, and a controller. The supplemental fuel tank is configured to store a supplemental fuel. The supplemental fuel is configured to supplement a primary fuel used by an engine. The electronic lock off valve is configured to be positioned between the supplemental fuel tank and an air supply system for the engine. The temperature sensor is configured to acquire temperature data regarding a temperature of exhaust gas output by the engine. The controller is configured to control the electronic lock off valve such that the electronic lock off valve is (i) closed in response to the temperature being greater than a temperature threshold and (ii) open or openable in response to the temperature being less than the temperature threshold.

A supplemental fuel system includes a supplemental fuel tank, an electronic valve, a temperature 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 temperature sensor is configured to acquire temperature data regarding a temperature of the engine. The controller is configured to control the electronic valve such that the electronic valve is (i) closed to prevent the supplemental fuel from being provided to the air supply system in response to the temperature being less than a temperature threshold and (ii) open or openable to permit the supplemental fuel to be provided to the air supply system in response to the temperature being greater than the temperature threshold.

Systems and methods for reducing driver awareness of engine stoppage by a vehicle are disclosed herein. In an embodiment, the system includes a stop-start mechanism in communication with an engine operable to cause movement of the vehicle, the stop-start mechanism programmed to shut off the engine at a beginning of a nonoperational period and restart the engine at an end of the nonoperational period. The system also includes a vibration device triggered to cause at least one vehicle component to vibrate when the stop-start mechanism shuts off the engine at the beginning of the nonoperational period, and triggered to cease causing the at least one vehicle component to vibrate when the stop-start mechanism restarts the engine at the end of the nonoperational period.

Various systems and methods are provided for adjusting operating parameters of an internal combustion engine. In one example, a system may include adjusting an amount of advance of a fuel injection timing of a plurality of fuel injectors of an internal combustion engine relative to top dead center (TDC) responsive to engine output demand, where, as the engine output demand increases, the amount of advance first decreases and then increases. In this way, an amount of vehicle emissions may be decreased while an amount of fuel consumption is decreased.

An engine control device for an industrial vehicle includes a seating detector configured to detect a seating state of a driver relative to a driver seat, a neutral detector configured to detect whether a direction operating member of the industrial vehicle is positioned in a neutral position, a fuel supply member configured to supply a fuel to the engine, a first controller configured to stop an output of a driving force from the engine when the seating detector detects that the driver is away from the driver seat, and a second controller configured to restart the output of the driving force from the engine in case that the seating detector detects that the driver is seated on the driver seat and the neutral detector detects that the direction operating member is positioned in the neutral position, after the first controller stops the output of the driving force from the engine.

An assembly for an engine includes a control module including a controller operable to control at least certain aspects of the operation of the engine, a display including an input connected to the controller, and a wireless receiver connected to the controller. The wireless receiver is arranged to receive a signal from a wireless device to cause the controller to send an engine start signal to cause starting of the engine and wherein the input when actuated causes the controller to send an engine start signal to cause starting of the engine. In at least some implementations, no keyed ignition switch is provided to start the engine and the engine is started only via the wireless device or the input.

A control system for a powertrain of a vehicle includes a set of sensors configured to monitor a set of operating parameters of the vehicle indicative of at least (i) whether a driver of the vehicle is in control of the vehicle, (ii) an intended direction of motion of the vehicle, and (iii) actual motion of the vehicle and a controller configured to, based on the set of operating parameters determine whether the driver of the vehicle is in control of the vehicle and when the driver is determined not to be in control of the vehicle determine whether the actual motion of the vehicle is in the intended direction of motion of the vehicle and when the actual motion of the vehicle is not in the intended direction of motion of the vehicle, control a torque output of the engine to hold the vehicle stationary.