A heater control apparatus for a diesel fuel filter according to an exemplary embodiment of the present disclosure includes a fuel temperature sensor for sensing a temperature of diesel fuel, a main relay including a first internal coil and a first switch, a pre-filter heater relay including a second internal coil and a second switch; a first node, a second node, a third node, and an engine control unit (ECU).

In at least some implementations, a charge forming system for a combustion engine includes a first fuel supply device having a first passage from which fuel is discharged for delivery to the engine and a second fuel supply device having a second passage from which fuel is discharged for delivery to the engine. The first passage communicates with the second passage so that the fuel in the first passage is combined with the fuel in the second passage.

In at least some implementations, a charge forming system for a combustion engine includes a first fuel supply device having a first passage from which fuel is discharged for delivery to the engine and a second fuel supply device having a second passage from which fuel is discharged for delivery to the engine. The first passage communicates with the second passage so that the fuel in the first passage is combined with the fuel in the second passage.

In at least some implementations, a charge forming system for a combustion engine includes a first fuel supply device having a first passage from which fuel is discharged for delivery to the engine and a second fuel supply device having a second passage from which fuel is discharged for delivery to the engine. The first passage communicates with the second passage so that the fuel in the first passage is combined with the fuel in the second passage.

In at least some implementations, a charge forming system for a combustion engine includes a first fuel supply device having a first passage from which fuel is discharged for delivery to the engine and a second fuel supply device having a second passage from which fuel is discharged for delivery to the engine. The first passage communicates with the second passage so that the fuel in the first passage is combined with the fuel in the second passage.

A handheld engine-driven working machine has an AC power supply, a supplying device which supplies fuel and/or air to an engine, a first path and a second path which are connected to the AC power supply in series and connected to each other in parallel, a handle heater for a handle located in the first path, a device heater for the supplying device located in the second path, and a controller located in the second path. The controller includes a temperature switch for the supplying device and a half-wave blocking element connected to the device heater in series. The temperature switch blocks the second path when a temperature of the temperature switch is higher than a predetermined temperature.

A heated throttle plate formed from a strip of etched 304SS foil rated for 35 watts and formed into a predetermined pattern having a first end electrically coupled to a positive leadwire and a second end electrical coupled to a ground leadwire. The foil is positioned between layers of polyimide for encapsulating the foil therebetween. The leadwires are electrically coupled to a fused relay connection secured to an engine oil pressure sensor. In one embodiment the heater plate operates on 14 volts and 35 watts for heating the throttle valve to 150 F. A throttle shaft forms a channel for passage of the leadwires through the throttle body housing. The heater plate is constructed and arranged to conform to the shape of a stock throttle valve and attach thereto utilizing stock throttle valve fasteners.

A heated throttle plate formed from a strip of etched 304SS foil rated for 35 watts and formed into a predetermined pattern having a first end electrically coupled to a positive leadwire and a second end electrical coupled to a ground leadwire. The foil is positioned between layers of polyimide for encapsulating the foil therebetween. The leadwires are electrically coupled to a fused relay connection secured to an engine oil pressure sensor. In one embodiment the heater plate operates on 14 volts and 35 watts for heating the throttle valve to 150 F. A throttle shaft forms a channel for passage of the leadwires through the throttle body housing. The heater plate is constructed and arranged to conform to the shape of a stock throttle valve and attach thereto utilizing stock throttle valve fasteners.