Claims:1. A device (120) to safeguard a high pressure fuel pump (110) in a vehicle
(100), said device (120) comprising:
? at least a mechanical sensor (210) capable of monitoring fuel
characteristics of fuel flowing through an inlet pipe 5 (114) of said high
pressure fuel pump (110) from a low pressure circuit (130);
? a mechanical switch (220) adapted to actuate switching action
based on said mechanical sensor (210) output;
? a delay circuit (230) configured to determine shutoff action for an
10 electromagnetic valve (ELAB) (140) based on switching action from
said mechanical switch (220); and
? a count circuit (240) configured to calculate number of instances
where said delay circuit (230) determined the shutoff action for said
ELAB (140).
2. The device (120) as claimed in claim 1, wherein said mechanical sensor
(210) adapted to identify negative pressure or pressure fluctuation in
said inlet pipe (114) of said high pressure fuel pump (110) and translate
identified negative pressure or pressure fluctuation as output to said
mechanical switch (220);
3. The device (120) as claimed in claim 1, wherein said mechanical sensor
(210) is a mechanical pressure sensor (212) capable of measuring
pressure of fuel flowing through said inlet pipe (114).
4. The device (120) as claimed in claim 1, wherein said mechanical sensor
(210) is a mechanical flow sensor (214) capable of measuring flow of
25 fuel through said inlet pipe (114).
5. The device (120) as claimed in claim 1, wherein the determined shutoff
action for said ELAB (140) and the calculated number of instances
shutoff action capable of being displayed on dashboard of said vehicle
(100).
6. A method for safeguarding a high pressure fuel pump 5 (110) in a vehicle
(100), said method comprising the steps of:
? monitoring, by at least a mechanical sensor (210), fuel
characteristics of fuel flowing through an inlet pipe (114) of said high
pressure fuel pump (110) from a low pressure circuit (130);
10 ? actuating, by a mechanical switch (220), switching action based on
said mechanical sensor (210) output;
? determining, by a delay circuit (230), shutoff action for an
electromagnetic valve (ELAB) (140) based on switching action from
said mechanical switch (220); and
15 ? calculating, by a count circuit (240), number of instances where said
delay circuit (230) determined the shutoff action for said ELAB (140).
7. The method as claimed in claim 6, wherein said mechanical sensor
(210) adapted to identify negative pressure or pressure fluctuation in
said inlet pipe (114) of said high pressure fuel pump (110) and translate
20 identified negative pressure or pressure fluctuation as output to said
mechanical switch (220);
8. The method as claimed in claim 6, wherein said mechanical sensor
(210) is a mechanical pressure sensor (212) capable of measuring
pressure of fuel flowing through said inlet pipe (114).
9. The method as claimed in claim 6, wherein said mechanical sensor
(210) is a mechanical flow sensor (214) capable of measuring flow of
fuel through said inlet pipe (114).
10. The method as claimed in claim 6, wherein the determined shutoff
action for said ELAB (140) and the calculated number 5 of instances
shutoff action capable of being displayed on dashboard of said vehicle
(100). , Description:A device and method to safeguard a high pressure fuel pump in a vehicle is
disclosed. The device (120) comprising at least a mechanical sensor (210) capable
of monitoring fuel characteristics of fuel flowing through an inlet pipe (114) of the high
pressure fuel pump (110) from a low pressure circuit (130), a mechanical 5 switch (220)
adapted to actuate switching action based on the mechanical sensor (210) output, a
delay circuit (230) configured to determine shutoff action for an electromagnetic valve
(ELAB) (140) based on switching action from the mechanical switch (220), and a
count circuit (240) configured to calculate number of instances where the delay circuit
10 (230) determined the shutoff action for the ELAB (140).