Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1990-12-26
1991-10-08
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
F02M 2507
Patent
active
050544608
ABSTRACT:
An exhaust gas recirculation system which comprises a passage provided between an exhaust passage of an internal combustion engine and an intake passage thereof, a valve provided at an intermediate portion of the passage for regulating a flow of an exhaust gas recirculated through the passage, a fuel distillation part for sensing a fuel distillation characteristic of a fuel within a fuel tank, an engine temperature part for sensing an engine temperature of the internal combustion engine, a first valve control part, and a second valve control part. The first valve control part generates a reference value at which the valve is turned ON allowing the exhaust gas recirculation to the intake passage, the reference value being varied to a first level when the fuel is a heavy type fuel and varied to a second level when the fuel is a light type fuel, the first level being higher than the second level. The second valve control part compares the engine temperature with the reference value, so that the valve is turned off stopping the exhaust gas recirculation while the engine temperature is not higher than the reference value, and the valve is turned on allowing the exhaust gas to be recirculated to the intake passage after the engine temperature exceeds the reference value. It is possible to vary the reference value in accordance with the fuel distillation characteristic of the fuel used, preventing driveability from worsening and properly reducing the amount of nitrogen oxide in the exhaust gas.
REFERENCES:
patent: 4056083 (1977-11-01), Wakita
patent: 4139151 (1979-02-01), Thornburgh
patent: 4304210 (1981-12-01), Hayakawa
patent: 4393840 (1983-07-01), Tanaka et al.
patent: 4462377 (1984-07-01), Tanaka et al.
patent: 4474008 (1984-10-01), Sakurai et al.
patent: 4485794 (1984-12-01), Kimberley et al.
patent: 4594993 (1986-06-01), Engel et al.
patent: 4770148 (1988-09-01), Hibino et al.
patent: 4909225 (1990-03-01), Gonze et al.
Toyota Jidosha & Kabushiki Kaisha
Wolfe Willis R.
LandOfFree
Exhaust gas recirculation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Exhaust gas recirculation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas recirculation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-251021