This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Measuring Technology to Analyze HC Concentration in the Air Intake System while the Engine is in Operation
Technical Paper
2004-01-0142
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In order to correspond to the exhaust emissions regulations that become severe every year, more advanced engine control becomes necessary. Engine engineers are concerned about the Hydrocarbons (HCs) that flow through the air-intake ports and that are difficult to precisely control. The main sources of the HCs are, the canister purge, PCV, back-flow gas through the intake valves, and Air / Fuel ratio (A/F) may be aggravated when they flow into the combustion chambers. The influences HCs give on the A/F may also grow even greater, which is due to the increasingly stringent EVAP emission regulations, by more effective ventilation in the crankcase, and also by the growth of the VVT-operated angle and timing, respectively.
In order to control the A/F more correctly, it is important to estimate the amount of HCs that are difficult to manage, and seek for suitable controls over fuel injection and so on. Therefore, the authors have developed a HC concentration measuring technology for the air-intake system using FID of which gas sampling performance has been remarkably improved. The characteristics of the system are as follows;
-
1.
Applicable to each point of the intake system
-
2.
Applicable to all engine operating conditions including the transition stage
-
3.
Small influences on the A/F control by gas sampling
-
4.
High accuracy; 1%F.S.
This report presents the results gained from the several tests carried out on EVAP purging, PCV gas supplying, and VVT system operation, as well as on the process of measuring technology development.
Recommended Content
Authors
Topic
Citation
Kawano, T., Itakura, H., Kato, N., Osanai, A. et al., "A Measuring Technology to Analyze HC Concentration in the Air Intake System while the Engine is in Operation," SAE Technical Paper 2004-01-0142, 2004, https://doi.org/10.4271/2004-01-0142.Also In
References
- Grieve M.James et al. “Advanced Canister Purge Algorithm with a Virtual [HC] Sensor” SAE Paper No. 2000-01-0557
- Cowart Jim S. et al. “Throttle Movement Rate Effects on Transient Fuel Compensation in a Port-Fuel-Injected SI Engine” SAE Paper No. 2000-01-1937
- Svoboda Mark H. “Comparison of Air Meter Interface Strategies for Engine Management Systems” SAE Paper No. 2000-01-0546
- Itakura Hideaki et al. “Studies on Carbon Canisters to Satisfy LEVII EVAP Regulations” SAE Paper No. 2000-01-0895