Injection Fuel Feeding System (Te-Txc) - Husqvarna TE 250-310 2012 I.E. Workshop Manual

TE 250 - 310 2012 I.E. / TE 250 - 310 2012 I.E. USA
TC 250 2012 - TC 250 2012 I.E. USA
2
a
3
5
c
e
b
2
FUEL INJECTION SYSTEM
TXC 250 - 310 2012 I.E. USA

Injection fuel feeding system (TE-TXC)

The injection fuel feeding system is composed of fuel tank (1), electric pump
(2), pipe (3) and injector (4). The fuel in the tank is pumped by the pump. The
pressurised fuel flows into the injector installed on the throttle body (6). The
electronic control unit (5) located under the tank signals the injector to open and
a fan-shaped spray of fuel is injected into the combustion chamber.
The parameters that play a role in determining proper fuel delivery under all
operating conditions are as follows:
a
- Air temperature in the intake manifold;
- Engine coolant temperature;
1
- Atmospheric pressure in the intake manifold (in current location and at cur-
rent altitude);
- Throttle opening;
- Battery voltage;
- Gear shift position;
a
- Fuel injection pulse width;
- Lambda sensor heater;
- Lean or rich mixture (LAMBDA sensor).
The "HUSQVARNA SERVICE TOOL" provides a tool to check these parameters
in the event the fuel injection malfunctions.
The electric fuel pump (2) is installed on the bottom of the tank (1) and is com-
posed of rotor, magnet, impeller, brushes, pressure regulator.
H02371
The electronic control unit (5) switches the pump ON/OFF.
To remove the fuel pump (2) see section "E".
H03070
d
f
H02373
4
6
a- Fuel pump retaining screw
b- Delivery fitting
c- Pump filter
d- Pump electric connector
e- Delivery/return hose quick fit-
ting
f- Pressure regulator
S.3
H11141
Workshop Manual Ed. 12-2011