IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0490000
(2002-07-26)
|
우선권정보 |
DE-101 47 189(2001-09-25) |
국제출원번호 |
PCT/DE02/002784
(2002-07-26)
|
§371/§102 date |
20040909
(20040909)
|
국제공개번호 |
WO03/027472
(2003-04-03)
|
발명자
/ 주소 |
- Joos,Klaus
- Wolber,Jens
- Frenz,Thomas
- Weiss,Ruediger
- Amler,Markus
- Hinn,Karsten
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
12 |
초록
▼
A method for operating a fuel-supply system for an internal combustion engine of a motor vehicle is provided, the fuel-supply system having a fuel-storage tank, a fuel pump and a pressure sensor, the fuel pump supplying fuel from the fuel-storage tank to a pressure region, the pressure sensor being
A method for operating a fuel-supply system for an internal combustion engine of a motor vehicle is provided, the fuel-supply system having a fuel-storage tank, a fuel pump and a pressure sensor, the fuel pump supplying fuel from the fuel-storage tank to a pressure region, the pressure sensor being arranged in the pressure region, and the pressure sensor generating a signal representing the pressure in the pressure region.
대표청구항
▼
What is claimed is: 1. A method for operating a fuel-supply system for an internal combustion engine, the fuel-supply system including a fuel-storage tank, a fuel pump for supplying fuel from the fuel-storage tank to a pressure region, and a pressure sensor, the pressure sensor being arranged in th
What is claimed is: 1. A method for operating a fuel-supply system for an internal combustion engine, the fuel-supply system including a fuel-storage tank, a fuel pump for supplying fuel from the fuel-storage tank to a pressure region, and a pressure sensor, the pressure sensor being arranged in the pressure region and being configured to generate a signal representing a pressure in the pressure region, the method comprising: detecting signals from the pressure sensor at least two different preselected time instants, wherein the preselected time instants are determined as a function of at least one of a state of the fuel-supply system and a driving situation of the motor vehicle; storing the signals detected at different preselected time instants in a memory; and determining a fault of the pressure sensor if a value of a difference between a first signal value and a second signal value is smaller than a preselected threshold value; wherein the fuel pump is triggered according to preselected setpoint pressures in the pressure region, a first setpoint pressure being preselected and the first signal value being detected following a first response time, and a second setpoint pressure being preselected and the second signal value being detected following a second response time. 2. The method as recited in claim 1, wherein: the first signal value is detected upon a start-up of the motor vehicle before the fuel pump is activated; the second signal value is detected following a preselected time after activation of the fuel pump; and the threshold value is determined as a function of a shut-off pressure and a pressure increase. 3. The method as recited in claim 1, wherein: the first signal value is detected during an overrun operation of the motor vehicle; and the second signal value is detected after a preselected deactivation time following a deactivation of the fuel pump. 4. The method as recited in claim 1, wherein: the first signal value is detected after a preselected deactivation time following deactivation of the fuel pump during an overrun operation of the motor vehicle; and the second signal value is detected after a preselected activation time following activation of the fuel pump. 5. The method as recited in claim 1, wherein: the first signal value is detected following a shut-off of the internal combustion engine; and the second signal value is detected following a preselected shut-off time. 6. A control device for an internal combustion engine of a motor vehicle, the motor vehicle having a fuel-storage tank and a fuel pump supplying fuel from the fuel-storage tank to a pressure region, comprising; a pressure sensor arranged in the pressure region and configured to generate signals representing the pressure in the pressure region at least two different preselected time instants as a function of at least one of a state of the fuel-supply system and a driving situation of the motor vehicle; and an electronic control unit configured to: receive the signals detected at the pressure sensor at the different preselected time instants; store the signals detected at the different preselected time instants in a memory; and determine a fault of the pressure sensor if a value of a difference between the first signal value and the second signal value is smaller than a preselected threshold value; wherein the fuel pump is triggered according to preselected setpoint pressures in the pressure region, a first setpoint pressure being preselected and the first signal value being detected following a first response time, and a second setpoint pressure being preselected and the second signal value being detected following a second response time. 7. A computer-readable storage medium storing a computer program having program codes executable on a processor of an electronic control unit of a motor vehicle, the program performing, when executed by the processor, control of: receiving signals detected at a pressure sensor, the pressure sensor arranged in a pressure region of a fuel-supply line and configured to generate signals representing the pressure in the pressure region at least two different preselected time instants; storing the signals detected at the two different preselected time instants in a memory; and determining a fault of the pressure sensor if a value of a difference between a first signal value and a second signal value is smaller than a preselected threshold value; wherein a fuel pump for supplying fuel from a fuel-storage tank to the pressure region is triggered according to preselected setpoint pressures in the pressure region, a first setpoint pressure being preselected and the first signal value being detected following a first response time, and a second setpoint pressure being preselected and the second signal value being detected following a second response time. 8. A fuel-supply system for an internal combustion engine of a motor vehicle, comprising: a fuel-storage tank; a fuel pump for supplying fuel from the fuel-storage tank to a pressure region; a pressure sensor arranged in the pressure region configured to generate signals which represent the pressure in the pressure region; and a processing unit configured to evaluate the signals representing the pressure in the pressure region for a diagnosis of the pressure sensor, the processing unit further being configured to: receive signals representing the pressure in the pressure region detected at least two different preselected time instants, the preselected time instants being determined as a function of at least one of a state of the fuel-supply system and a driving situation of the motor vehicle; store the signals in a memory; and determine a fault of the pressure sensor if a difference between the values of a first signal and a second signal is smaller than a preselected threshold value; wherein the fuel pump is triggered according to preselected setpoint pressures in the pressure region, a first setpoint pressure being preselected and the first signal value being detected following a first response time, and a second setpoint pressure being preselected and the second signal value being detected following a second response time.
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