Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1991-02-14
1991-11-26
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
F02D 4114
Patent
active
050674650
ABSTRACT:
A lean burn internal combustion engine wherein a basic fuel amount is calculated from a map based on the intake pressure and the engine speed, and a lean correction factor, which is multiplied by the basic fuel amount, is calculated from a lean map based on the intake pressure and engine speed. A second lean map based on the throttle opening and engine speed is provided for obtaining a lean correction factor when the degree of opening of the throttle valve is larger than a predetermined value. A lean sensor is provided for obtaining a signal indicating the air fuel ratio for carrying out a feedback control. The lean sensor is provided with a heater for controlling the temperature of the sensing element of the heater. A basic map for the heater power, which is based on the intake pressure and engine speed, is provided, and a correction map for the heater power is provided for reducing the heater power from the value obtained from the basic map when the lean map based on the intake pressure and engine speed is employed for obtaining the lean air-fuel mixture, to prevent thermal damage to the sensor element.
REFERENCES:
patent: 4365604 (1982-12-01), Sone
patent: 4520783 (1985-06-01), Matsushita et al.
patent: 4611562 (1986-09-01), Nakano et al.
patent: 4651700 (1987-03-01), Kobayashi et al.
patent: 4694809 (1987-09-01), Nakano et al.
patent: 4715343 (1987-12-01), Kinoshita
patent: 4719888 (1988-01-01), Kobayashi et al.
patent: 4825837 (1989-05-01), Nakagawa
patent: 4911130 (1990-03-01), Takahashi et al.
patent: 4938196 (1990-07-01), Hoshi et al.
patent: 4976242 (1990-12-01), Sonoda et al.
patent: 4991559 (1991-02-01), Osawa et al.
Fukuma Takao
Takaoka Toshio
Tsukamoto Keisuke
Yagi Kiyoshi
Yamasaki Hirofumi
Fujitsu Ten Limited
Toyota Jidosha & Kabushiki Kaisha
Wolfe Willis R.
LandOfFree
Lean burn internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lean burn internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lean burn internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2382087