Vehicle control system
First Claim
1. A vehicle control system comprising:
- a boosting circuit that supplies a boosting voltage to a rotating electric machine;
a boosting voltage setting unit that sets a value of the boosting voltage of the boosting circuit according to a detection result of an atmospheric pressure sensor;
an abnormality diagnosis unit that performs a diagnosis of an abnormality on the atmospheric pressure sensor or an engine intake pressure sensor, based on a comparison between a value detected by the engine intake pressure sensor and a value detected by the atmospheric pressure sensor when an engine has stopped;
a circuit unit power supply that supplies operational electric power to the abnormality diagnosis unit; and
a power supply stop delaying unit that delays a stop of the circuit unit power supply until an atmospheric pressure return period, during which an air pressure detected by the engine intake pressure sensor returns to an atmospheric pressure, has elapsed.
1 Assignment
0 Petitions
Accused Products
Abstract
In a vehicle control system, an opportunity for detecting abnormalities in an atmospheric pressure sensor using an intake pressure sensor of the engine is appropriately provided. A vehicle control system 10 includes an engine 12, rotating electric machines 14 and 16, a power supply circuit 18, an intake pressure sensor 20, an atmospheric pressure sensor 22, an IG-ON/OFF switch 70, and a control device 48. A control unit 50 of the control device 48 includes a system start/stop module 52 which starts and stops operation of the entire system, a sensor state determination module 54 which determines whether the atmospheric pressure sensor 22 is in an abnormal state based on a detection value of the intake pressure sensor 20, a boosting limit module 56 which limits the boosting voltage of the voltage converter 34 corresponding to a detection value of the atmospheric pressure sensor 22, and a power supply stop delaying module 58 which delays a stop of electric power supply from a low-voltage battery 44 for a predetermined period after the engine stopped.
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Citations
10 Claims
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1. A vehicle control system comprising:
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a boosting circuit that supplies a boosting voltage to a rotating electric machine; a boosting voltage setting unit that sets a value of the boosting voltage of the boosting circuit according to a detection result of an atmospheric pressure sensor; an abnormality diagnosis unit that performs a diagnosis of an abnormality on the atmospheric pressure sensor or an engine intake pressure sensor, based on a comparison between a value detected by the engine intake pressure sensor and a value detected by the atmospheric pressure sensor when an engine has stopped; a circuit unit power supply that supplies operational electric power to the abnormality diagnosis unit; and a power supply stop delaying unit that delays a stop of the circuit unit power supply until an atmospheric pressure return period, during which an air pressure detected by the engine intake pressure sensor returns to an atmospheric pressure, has elapsed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification