-
公开(公告)号：US11840248B2
公开(公告)日：2023-12-12
申请号：US16562194
申请日：2019-09-05
CPC分类号： B60W50/10 , B60W20/13 , B60W40/08 , G05D1/021 , B60W2040/0818 , B60W2510/105
摘要： A method for operating a powertrain of an autonomous vehicle is described. In one example, the autonomous driver may supply a torque request and a torque or power urgency assessment to a powertrain controller. The powertrain controller may monitor vehicle control system parameters based on the driver demand torque and the torque or power urgency assessment.
-
公开(公告)号：US11306631B2
公开(公告)日：2022-04-19
申请号：US16816039
申请日：2020-03-11
IPC分类号： F01M13/00 , F02M35/10 , F02M25/06 , F01M11/03 , F01M13/04 , B60K6/28 , B60K6/26 , B60K6/24 , B01D45/08 , B60Q9/00
摘要： Methods and systems are provided for assessing a state of a vent hose that fluidically couples a crankcase of an engine to an engine air intake system. In one example, a method may include sealing the crankcase from the vent hose, initiating cranking of the engine, monitoring a series of pressure pulsations during a monitoring window duration via a pressure sensor positioned between a crankcase oil separator and the vent hose, and indicating a presence of degradation associated with the vent hose based on the series of pressure pulsations and the monitoring window duration. In this way, diagnosis of a state of the vent hose may be reliably assessed without crankcase pressures confounding pressure measurements as recorded via the pressure sensor.
-
公开(公告)号：US10774756B1
公开(公告)日：2020-09-15
申请号：US16427156
申请日：2019-05-30
发明人： Aed M. Dudar , Robert Roy Jentz
摘要： Methods and systems are provided for detecting degradation of a positive crankcase ventilation (PCV) system valve and a cylinder valve. In one example, a method may include comparing a rate of pressure bleed-up in a PCV system during each of a cold-engine condition and a hot-engine condition to differentiate between the PCV valve and the cylinder valve.
-
公开(公告)号：US10767590B1
公开(公告)日：2020-09-08
申请号：US16450861
申请日：2019-06-24
摘要： Methods and systems are provided for diagnosing a positive crankcase ventilation (PCV) system. In one example, a diagnostic method for a PCV system is provided that includes, when an intake manifold air pressure is above a threshold boost value, determining a PCV system breach based on a pressure determined using a pressure sensor positioned on a clean side of an oil separator coupled to a crankcase and receiving crankcase gas from the crankcase. In the PCV system a ventilation line provides fluidic communication between the oil separator and an intake conduit upstream of a compressor.
-
公开(公告)号：US10436087B2
公开(公告)日：2019-10-08
申请号：US15792677
申请日：2017-10-24
发明人： Robert Roy Jentz , Sanyam Sharma , Sumanth Dadam
摘要： Methods and systems are provided for a heat exchanger phase change material installed as a component of a variable exhaust tuning system. In one example, a method may include absorbing excess heat energy from exhaust gases during and after an engine-on event within a heat exchanger material, releasing heat energy stored in the heat exchanger material during and after an engine-off event, and heating an adjustable exhaust valve with the heat energy stored in the heat exchanger material.
-
公开(公告)号：US20190285013A1
公开(公告)日：2019-09-19
申请号：US15921561
申请日：2018-03-14
发明人： Aed Dudar , Robert Roy Jentz
摘要： Methods and systems are provided for a dual function imaging device. In one example, a method may comprise imaging exhaust gas outside of a reverse engine condition via the imaging device. The imaging device may image a surrounding area during the reverse engine condition.
-
公开(公告)号：US10330051B2
公开(公告)日：2019-06-25
申请号：US15389195
申请日：2016-12-22
发明人： Aed M. Dudar , Douglas Raymond Martin , Robert Roy Jentz , Kevin Lucka , Mohammad R. Aghili , Donald P. Tinsley, III
IPC分类号： F02M25/08 , B60K15/035 , F02D41/00 , B60K15/03
摘要： Methods and systems are provided for conducting tests for undesired evaporative emissions on a vehicle fuel system and evaporative emissions system. In one example, a method may include learning routes commonly traveled by the vehicle, including altitude changes and stop durations, and may further include diagnosing the fuel system and evaporative emissions system based on the learned altitude changes in one example, and may include diagnosing the fuel system and evaporative emissions system based on a learned stop duration in another example. By conducting tests for undesired evaporative emissions as a function of learned travel routes, completion rates for tests for undesired evaporative emissions tests may be increased, and the release of undesired evaporative emissions to atmosphere may be reduced.
-
公开(公告)号：US10100758B2
公开(公告)日：2018-10-16
申请号：US15922079
申请日：2018-03-15
摘要： A vehicle method for barometric pressure identification, including adjusting engine operation responsive to barometric pressure, the barometric pressure based on a pressure change at a sector of the fuel system when the sector is sealed with the vehicle travelling. The method may utilize a pressure change at the sealed sector of the fuel system, such as a sealed fuel tank, to identify barometric pressure, even with the engine off for extended durations of vehicle travel. As such, in a hybrid-vehicle application, including during hill descents in which the engine is maintained off, barometric pressure can still be updated.
-
公开(公告)号：US20180202376A1
公开(公告)日：2018-07-19
申请号：US15922079
申请日：2018-03-15
CPC分类号： F02D41/0037 , B60W20/00 , B60W2550/12 , B60W2710/0616 , F02M25/0854 , F02N2200/121 , F02N2200/122 , Y10S903/904
摘要： A vehicle method for barometric pressure identification, including adjusting engine operation responsive to barometric pressure, the barometric pressure based on a pressure change at a sector of the fuel system when the sector is sealed with the vehicle travelling. The method may utilize a pressure change at the sealed sector of the fuel system, such as a sealed fuel tank, to identify barometric pressure, even with the engine off for extended durations of vehicle travel. As such, in a hybrid-vehicle application, including during hill descents in which the engine is maintained off, barometric pressure can still be updated.
-
公开(公告)号：US09885305B2
公开(公告)日：2018-02-06
申请号：US15052688
申请日：2016-02-24
IPC分类号： F02D41/14 , F02B75/18 , F02D41/00 , F02D41/26 , F02D43/04 , F02P5/15 , F02D41/20 , F02D41/28
CPC分类号： F02D41/1458 , F02B75/18 , F02D41/0002 , F02D41/0097 , F02D41/1497 , F02D41/26 , F02D43/04 , F02D2041/1432 , F02D2041/2051 , F02D2041/281 , F02D2041/288 , F02D2200/101 , F02P5/1512 , Y02T10/46
摘要： Methods and systems are described for monitoring air/fuel imbalance in cylinders of an engine. Engine speed signals are sampled and then run through a notch filter set to the sampling frequency. Based on a first frequency content of the resulting filtered engine speed, cylinder imbalance is detected and addressed.
-
-
-
-
-
-
-
-
-
搜索结果
173 条记录 (耗时 0.029 秒)
