WASTE HEAT RECOVERY SYSTEM WITH PARALLEL EVAPORATORS AND METHOD OF OPERATING

    公开(公告)号:US20190128147A1

    公开(公告)日:2019-05-02

    申请号:US16309719

    申请日:2017-06-09

    Abstract: A control system for a vehicle comprises a controller (114), with the controller (114) further including a processor and a memory. The memory stores instructions executable by the processor such that the controller is programmed to detect a temperature difference (ΔTEvap), select a flow ratio, and select a valve opening setting (242, 244, 250, 252, 258, 260). The difference in temperature (ΔTEvap) is between a working fluid (15) downstream of a first evaporator (16) and a working fluid (15) downstream of a second evaporator (20). The flow ratio is a desired flow ratio based on the difference in temperature (ΔTEvap). The valve opening setting (242, 244, 250, 252, 258, 260) for each of a first valve (84) regulating flow of the working fluid into the first evaporator (16) and a second valve (86) regulating flow of the working fluid into the second evaporator (20) based on the flow ratio.

    CONTROL STRATEGY FOR A VARIABLE SPRING RATE ABSORBER

    公开(公告)号:US20170248189A1

    公开(公告)日:2017-08-31

    申请号:US15512858

    申请日:2015-09-10

    CPC classification number: F16F15/002 F02D41/0097 F16F2228/001 F16F2230/18

    Abstract: A variable spring rate absorber is adjusted to provide the vibration attenuation characteristics needed to match current operating conditions. Control of a variable spring rate absorber determines the desired absorber spring rate for existing conditions based on a number of inputs and predetermined characterization tables. Once the spring rate is calculated, a predetermined map may be used to determine the absorber setting needed to achieve the desired spring rate. A sensor may be used to measure the actual state of the absorber to determine the extent to which the setting must be adjusted to achieve the desired spring rate.

    WASTE HEAT RECOVERY SYSTEM WITH PARALLEL EVAPORATORS AND METHOD OF OPERATING

    公开(公告)号:US20190309656A1

    公开(公告)日:2019-10-10

    申请号:US16309686

    申请日:2017-06-09

    Abstract: Controlling a waste heat recovery system includes determining a difference in temperature (sensed ΔT) between a working fluid (15) downstream of a first evaporator (16) and a working fluid (15) downstream of a second evaporator (20) wherein the first evaporator (16) and the second evaporator (20) are in parallel. Each receives engine exhaust gas and working fluid. At least a first valve (84) is selectively actuated to regulate flow of the working fluid into the first evaporator (16) and the second evaporator (20) responsive to the difference in temperature (sensed ΔT). The first valve (84) regulates a flow of the working fluid into the first evaporator (16) and a second valve (86) regulates a flow of the working fluid into the second evaporator (20). A first feedforward signal (157) is generated for control of the first valve (84) based at least in part on the difference in temperature (sensed ΔT).

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