Injection Fuel Feeding System - Husqvarna 2013 TC 250R Workshop Manual

TE 250R - 310R 2013 I.E. / TE 310R 2013 I.E. USA
TC 250R 2013 - TC 250R 2013 I.E. USA
2
a
3
5
c
e
b
2
FUEL INJECTION SYSTEM
TXC 250R - 310R 2013 I.E. USA

Injection fuel feeding system

The fuel injection 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 saddle 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 filter box;
- 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 (only TE);
- Lean or rich mixture (LAMBDA sensor) (only TE).
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".
6
H11366
d
f
H02373
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
4
H11593
Workshop Manual Ed. 07-2012