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Internal State Estimation Device of Intake Collector

An internal state, collector technology, applied in the direction of fuel air intake, machine/engine, internal combustion piston engine, etc., can solve the problem of not considering the effect of the internal cooler

Active Publication Date: 2016-08-24
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in Patent Document 1, the influence of the temperature difference between the front and rear of the intercooler on the intake air pressure (internal state of the intake collector) necessary for diagnosis and the like is not considered at all.

Method used

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  • Internal State Estimation Device of Intake Collector
  • Internal State Estimation Device of Intake Collector
  • Internal State Estimation Device of Intake Collector

Examples

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Embodiment Construction

[0033] Embodiments of the present invention and advantages of the present invention will be described in detail below with reference to the drawings.

[0034] figure 1 It is a figure which shows the whole system which uses the internal state estimation apparatus of the intake air collector of this invention.

[0035] An intake passage 20 and an exhaust passage 30 are connected to the engine main body 10 . The intake valve 11 opens and closes the intake passage 20 . The exhaust valve 12 opens and closes the exhaust passage 30 . The intake cam position sensor 11 a detects the position of the intake cam, thereby detecting the opening and closing timing of the intake valve 11 . The exhaust cam position sensor 12 a detects the position of the exhaust cam, thereby detecting the opening and closing timing of the exhaust valve 12 . The ignition coil 13 ignites the air-fuel mixture in the cylinder. The crank angle sensor 14 detects the rotational position of the crankshaft.

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PUM

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Abstract

The present invention provides an internal state estimating device of an intake air collector, which can estimate the internal state of the intake air collector more accurately by considering the influence of the temperature difference before and after the internal cooler, thereby improving the accuracy of diagnosis. The internal state estimation device of the intake air collector includes: a supercharger (22) that pressurizes air sucked into the engine; an intake air collector (26) located downstream of the supercharger; and an internal cooler (27) that cools the air that is pressurized and heated by the supercharger, and a pre-cooling temperature detection device that is provided upstream of the internal cooler and detects the temperature of the air before it is pressurized by the supercharger and cooled by the internal cooler. section (24), a post-cooling temperature detection section (28) provided downstream of the intercooler and detecting the temperature of the air cooled by the intercooler, and estimating the representative temperature inside the intake air collector based on the pre-cooling temperature and the post-cooling temperature. The representative temperature estimation part (B101).

Description

technical field [0001] The invention relates to a device for estimating the internal state of an intake air collector of an internal combustion engine. Background technique [0002] In Patent Document 1, an intercooler is integrally provided with an intake collector disposed downstream of an intake valve. With such a structure, the intercooler also functions as an EGR cooler. [0003] Patent Document 1: (Japanese) Unexamined Patent Application Publication No. 2009-270508 [0004] However, in Patent Document 1, the influence of the temperature difference between the front and rear of the intercooler on the intake air pressure (internal state of the intake air collector) necessary for diagnosis and the like is not considered at all. Contents of the invention [0005] The present invention focuses on such conventional problems. An object of the present invention is to provide a device for estimating the internal state of the intake air collector, which can more accurately ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D9/02F02M35/10
CPCY02T10/12
Inventor 吉川俊一
Owner NISSAN MOTOR CO LTD