Claims:1. An Engine Control Unit (ECU) (120) to process engine position in a vehicle,
said vehicle comprises an Integrated Starter Generator (ISG) (108) coupled
to a crankshaft (106) of an engine (102), said ISG (108) operated by a
controller (110) to rotate said crankshaft (106) in reverse 5 direction (126) to
a predetermined engine position, and said ECU (120) comprising an Engine
Position Management (EPM) function (118) to monitor output signals (122)
of an engine position sensor (104) and determine engine position, said
controller (110) interfaced with said ECU (120) through any one of a
10 Controller Area Network (CAN) Bus and a dedicated hardwired connection,
said ECU (120) adapted to:
receive engine start signal, characterized in that,
start operation of said EPM function (118) only after receiving a
signal from an activation module (116) in dependence of status of
15 said ISG (108).
2. The ECU (120) as claimed in claim 1, wherein said activation module (116)
is configured to:
confirm fulfillment of any one set of condition out of multiple set of
20 conditions (114) to trigger an activation signal to said EPM function
(118).
3. The ECU (120) as claimed in claim 2, wherein a first set of condition
comprises detection of forward rotation (124) of said crankshaft (106), when
25 rotated by said ISG (108).
4. The ECU (120) as claimed in claim 2, wherein a second set of condition
comprises,
detection of loss of information, on reverse rotation (126) of said
30 crankshaft (106), from said controller (110);
detect at least one event selected from a group comprising a rotation
through said engine position sensor (104) and drop in battery voltage,
and
trigger an activation signal after a configurable delay time after at
least one 5 event is detected.
5. The ECU (120) as claimed in claim 2, wherein a third set of conditions
comprises
detection of loss of information, on reverse rotation (126) of said
10 crankshaft (106), from said controller (110);
monitor voltage profile of a battery (112), which supplies power to
said ISG (108), after detection of said loss of information;
trigger an activation signal if no drop in battery voltage is detected
during forward rotation (124) of said crankshaft (106).
6. A method for processing engine position in a vehicle, said vehicle comprises
an Integrated Starter Generator (ISG) (108) coupled to a crankshaft (106) of
an engine (102), said ISG (108) operated by a controller (110) to rotate said
crankshaft (106) in reverse direction (126) to a predetermined engine
20 position, and an Engine Control Unit (ECU) (120) equipped with an Engine
Position Management (EPM) function (118), said EPM function (118)
monitors output signals (122) of an engine position sensor (104) and
determines engine position, said controller (110) interfaced to said ECU
(120) through any one of a Controller Area Network (CAN) Bus and a
25 dedicated hardwired connection, said method comprising the steps of:
receiving engine start signal, characterized by,
starting, by said ECU (120), said EPM function (118) only after
receiving a signal from an activation module (116) in dependence of
status of said ISG (108).
7. The method as claimed in claim 1, wherein said activation module (116)
comprises the steps of:
confirming fulfillment of any one set of condition out of multiple
conditions (114), for triggering an activation signal to said EPM
5 function (118).
8. The method as claimed in claim 2, wherein a first set of condition comprises
detecting forward rotation (124) of said crankshaft (106), when rotated by
said ISG (108).
9. The method as claimed in claim 2, wherein a second set of conditions
comprises,
detecting loss of information, on reverse rotation (126) of said
crankshaft (106), from said controller (110), and
15 detecting at least one event selected from a group comprising a
rotation through said engine position sensor (104) and drop in battery
voltage, and
triggering an activation signal after a configurable delay time and
after detecting said at least one event.
10. The method as claimed in claim 2, wherein a third set of conditions
comprises
detecting loss of information, on reverse rotation (126) of said
crankshaft (106), from said controller (110);
25 monitoring voltage profile of a battery (112) supplying power to said
ISG (108) after detecting said loss of information, and
triggering an activation signal if no drop in battery voltage is
detected during forward rotation (124) of said crankshaft (106). , Description:The vehicle comprises an ISG 108 coupled to a crankshaft 106 of an engine 102.
The ISG 108 operated by a controller 110 to rotate the crankshaft 106 in reverse
direction 126 to a predetermined engine position. The ECU 120 comprises an
Engine Position Management (EPM) function 118 to monitor output signals 122 of
an engine position sensor 104 and determine engine position. The controller 110 is
interfaced to the ECU 120 through any one of a CAN bus and a dedicated hardwired
connection. The ECU 120 adapted to receive engine start signal, characterized in
that, the ECU 120 starts operation of the EPM function 118 only after receiving a
signal from an activation module 116 in dependence of status of the ISG 108. In
other words, the ECU 120 pauses or halts the EPM function 118 until the signal
from the activation module 116 is not received.