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US 11,746,717 B2Granted
Engine apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasanao Idogawa, Takahiro Uchida, Masahiro Kachi, Reiko Goh, Hirokatsu Yamamoto
Life of this patent
Estimating the term…
Abstract
A first arrival flow rate that is a flow rate of evaporative fuel gas that has arrived in a throttle downstream portion located downstream of a throttle valve in an intake pipe via a second purge passage after passing through a purge control valve is estimated based on a valve passage flow rate that is a flow rate of evaporative fuel gas that has passed through the purge control valve, and a first response delay in the flow of evaporative fuel gas through a route extending from the purge control valve to the throttle downstream portion via the second purge passage.
Claims6
An engine apparatus comprising:
- an engine that has a throttle valve arranged in an intake pipe, and that outputs motive power through explosive combustion in a combustion chamber through use of fuel supplied from a fuel tank;
- a supercharger that has a compressor arranged upstream of the throttle valve in the intake pipe;
- an evaporative fuel treatment device that has
- a supply passage through which evaporative fuel gas containing evaporative fuel produced in the fuel tank is supplied to the intake pipe in such a manner as to branch off into a first purge passage and a second purge passage, the first purge passage being connected to the intake pipe downstream of the throttle valve,
- an ejector having an intake port that is connected to a recirculation passage extending from the intake pipe between the compressor and the throttle valve,
- an exhaust port that is connected to the intake pipe upstream of the compressor, and
- a suction port that is connected to the second purge passage, and a purge control valve provided in the supply passage;
- and
- a control device, wherein
- the control device is configured to
- estimate a first arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in a throttle downstream portion located downstream of the throttle valve in the intake pipe, via the second purge passage, after passing through the purge control valve, based on
- a valve passage flow rate that is a flow rate of the evaporative fuel gas that has passed through the purge control valve, and
- a first response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the throttle downstream portion via the second purge passage,
- estimate a second arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in the throttle downstream portion via the first purge passage after passing through the purge control valve, based on
- the valve passage flow rate, and
- a second response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the throttle downstream portion via the first purge passage,
- estimate a third arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in the combustion chamber via the first purge passage after passing through the purge control valve, based on
- the valve passage flow rate, and
- a third response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the combustion chamber via the first purge passage, and
- estimate a fourth arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in the combustion chamber via the second purge passage after passing the purge control valve, based on
- the valve passage flow rate, and
- a fourth response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the combustion chamber via the second purge passage.
19 more elements
An engine apparatus, comprising:
- an engine that has a throttle valve arranged in an intake pipe, and that outputs motive power through explosive combustion in a combustion chamber through use of fuel supplied from a fuel tank;
- a supercharger that has a compressor arranged upstream of the throttle valve in the intake pipe;
- an evaporative fuel treatment device that has
- a supply passage through which evaporative fuel gas containing evaporative fuel produced in the fuel tank is supplied to the intake pipe in such a manner as to branch off into a first purge passage and a second purge passage, the first purge passage being connected to the intake pipe downstream of the throttle valve,
- an ejector having an intake port that is connected to a recirculation passage extending from the intake pipe between the compressor and the throttle valve,
- an exhaust port that is connected to the intake pipe upstream of the compressor, and
- a suction port that is connected to the second purge passage, and a purge control valve provided in the supply passage;
- and
- a control device,
- wherein
- the control device is configured to
- estimate a first arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in a throttle downstream portion located downstream of the throttle valve in the intake pipe, via the second purge passage, after passing through the purge control valve, based on
- a valve passage flow rate that is a flow rate of the evaporative fuel gas that has passed through the purge control valve, and
- a first response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the throttle downstream portion via the second purge passage, and
- the control device is configured to
- estimate a third arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in the combustion chamber via the first purge passage after passing through the purge control valve, based on
- the valve passage flow rate, and
- a third response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the combustion chamber via the first purge passage, and
- estimate a fourth arrival flow rate that is a flow rate of the evaporative fuel gas that has arrived in the combustion chamber via the second purge passage after passing the purge control valve, based on
- the valve passage flow rate, and
- a fourth response delay in flow of the evaporative fuel gas through a route extending from the purge control valve to the combustion chamber via the second purge passage.
18 more elements
Dependencies are inferred from the claim text.