Chun Keung Leung

US Patent:

42717981, Jun 9, 1981

Filed:

Oct 27, 1978

Appl. No.:

5/955728

Inventors:

William R. Seitz - Royal Oak MI
Chun K. Leung - Farmington Hills MI

Assignee:

The Bendix Corporation - Southfield MI

International Classification:

F02D 500

US Classification:

123419

Abstract:

A closed loop control system is disclosed for controlling the air-fuel ratio of an internal combustion engine. An oxygen sensor is connected into the control loop after engine warm up when the temperature has reached its operating temperature to maintain the air-fuel ratio close to the stoichiometric value. An engine roughness detector is connected into the control loop before the oxygen sensor has reached its operating temperature to maintain the air-fuel ratio close to a predetermined lean limit. A temperature sensor and switching means controlled thereby are provided to alternately connect the roughness detector and the oxygen sensor in the control loop.

US Patent:

44755112, Oct 9, 1984

Filed:

Sep 1, 1982

Appl. No.:

6/413919

Inventors:

Edwin A. Johnson - Clarkston MI
Chun K. Leung - Bloomfield Hills MI

Assignee:

The Bendix Corporation - Southfield MI

International Classification:

F02D 500

US Classification:

123436

Abstract:

A fuel distribution control for the fuel control system of an internal combustion engine having a fuel control computer generating fuel delivery signals indicative of the engines fuel requirements, means for delivering fuel to the engine in response to said fuel delivery signals and means for generating amplitude signals indicative of the magnitudes of the torque impulses generated by the individual cylinders, the fuel distribution control comprising means for correcting the amplitude signals as a function of the cylinders position along the engine's crankshaft and engine speed, means for generating an average amplitude signal for each cylinder, means for generating an individual difference signal for each cylinder indicative of the difference between the average amplitude signal for the individual cylinders and the average amplitude of all the cylinders, means for generating a fuel correction for each individual cylinder from said difference signals, and means for summing the fuel correction signal with the fuel delivery to generate a corrected fuel delivery signal operative to equalize the contribution of each cylinder to the total output torque of the engine.

US Patent:

41844610, Jan 22, 1980

Filed:

Sep 26, 1977

Appl. No.:

5/836333

Inventors:

Chun K. Leung - Farmington Hills MI

Assignee:

The Bendix Corporation - Southfield MI

International Classification:

F02D 500
F02M 706

US Classification:

123 32EH

Abstract:

An acceleration enrichment feature for a closed loop fuel management system controlling the air/fuel mixture delivered to an internal combustion engine to regulate the roughness of the engine at a predetermined level. The enrichment feature provides increased fuel to the engine for operator induced transient conditions proportionately by sensing the rate of change of throttle angle. A throttle angle position signal is modified by circuitry providing a transfer function that introduces a lag term into the throttle angle position signal which differentiating the signal to determine the rate of change of throttle angle. The modified throttle angle position signal is additionally corrected by the amount of roughness sensed by the closed loop control and enriched for rough operations of the engine beyond a threshold and leaned for smooth operations of the engine. Acceleration enrichment pulses of a frequency dependent on the magnitude of the corrected throttle position signal are then combined with the basic fuel injection pulses of the closed loop fuel management system to provide a desired A/F ratio during operator induced transients.

US Patent:

44186690, Dec 6, 1983

Filed:

Jul 19, 1982

Appl. No.:

6/399537

Inventors:

Edwin A. Johnson - Clarkston MI
Chun K. Leung - Bloomfield Hills MI

Assignee:

The Bendix Corporation - Southfield MI

International Classification:

G06F 1520
B60K 4118
F02D 500

US Classification:

123436

Abstract:

A fuel distribution control system for equalizing the amplitude of the torque impulses imparted to the crankshaft of an internal combustion engine having a fuel control computer generating fuel quantity signals indicative of the engines fuel requirements, fuel delivery means delivering fuel to the engine in response to the fuel quantity signals and means responsive to the instantaneous rotational velocity of the engine's crankshaft for generating signals indicative of the amplitude and phase angle of the torque impulses imparted to the engine's crankshaft by the individual cylinder. The distribution control including means for correcting the amplitude signal for errors in the phase angle of the torque impulses, means for generating an amplitude error signal indicative of the difference between the corrected amplitude signal and a desired amplitude, means for storing the amplitude error signal generated with respect to each cylinder to generate fuel correction signals and means for summing the fuel correction signals to the fuel quantity signals.

US Patent:

45204497, May 28, 1985

Filed:

Jul 19, 1982

Appl. No.:

6/399538

Inventors:

Edwin A. Johnson - Clarkston MI
Chun K. Leung - Bloomfield Hills MI

Assignee:

Allied Corporation

International Classification:

G06F 1520
G01R 2500

US Classification:

364559

Abstract:

A phase angle detector for computing the phase angle of the individual impulses imparted to the crankshaft of an internal combustion engine having means for computing the sin and cos functions of each torque impulse in response to the instantaneous rotational velocity of the engine's crankshaft, means for detecting a change in the rotational velocity of the engine's crankshaft at the beginning and end of each torque impulse, means for correcting the value of the generated sin function as a function of the difference the crankshaft's rotational velocity at the beginning and end of the torque impulse, and means for computing the phase angle of the torque impulse from the cos and corrected sin functions.

US Patent:

44768338, Oct 16, 1984

Filed:

Oct 21, 1982

Appl. No.:

6/435835

Inventors:

Edwin A. Johnson - Clarkston MI
Chun K. Leung - Bloomfield Hills MI

Assignee:

The Bendix Corporation - Southfield MI

International Classification:

F02B 300
F02P 504

US Classification:

123436

Abstract:

A fuel distribution control system for an internal combustion engine including means for detecting the instantaneous rotational velocity of the engine's crankshaft to generate a torque impulse amplitude signal and a phase angle signal, an amplitude correction circuit for correcting the torque impulse amplitude signal as a function of the phase angle signal, means for generating an amplitude error signal for each corrected torque impulse, and means for accumulating said amplitude error signals to generate individual fuel correction signals for each engine cylinder. The fuel correction signals are added to the fuel quantity signals generated by a fuel control computer in response to the operational parameters of the engine and a fuel delivery device responds to the combined fuel quantity and fuel correction signals to deliver a quantity of fuel to each engine cylinder tending to equalize the torque contribution of each cylinder to the total output torque of the engine.