Closed loop controlled auxiliary air delivery system for internal combustion engine

Patent 4240145 Issued on December 16, 1980. Estimated Expiration Date:

November 30, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Air-fuel ratio controlling device
Patent #: 4079711
Issued on: 03/21/1978
Inventor: Hattori , et al.

Air-to-fuel ratio controlling system for internal combustion engines
Patent #: 4084558
Issued on: 04/18/1978
Inventor: Hattori, et al.

Additional air control device for an internal combustion engine
Patent #: 4084563
Issued on: 04/18/1978
Inventor: Hattori, et al.

Air flow control system
Patent #: 4146000
Issued on: 03/27/1979
Inventor: Hattori , et al.

Electrical control method and apparatus for combustion engines
Patent #: 4163282
Issued on: 07/31/1979
Inventor: Yamada , et al.

Air-fuel ratio controlling apparatus for an internal combustion engine
Patent #: 4164914
Issued on: 08/21/1979
Inventor: Hattori , et al.

Additional air supply system for an internal combustion engine Patent #: 4173957
Issued on: 11/13/1979
Inventor: Hattori , et al.

Inventors

Assignee

Nissan Motor Company, Limited

Application

No. 05/965467 filed on 11/30/1978

US Classes:

701/110, Speed, acceleration, deceleration123/585, Auxiliary air or oxygen added to combustible mixture123/587, Oxidant controlled by intake manifold vacuum701/102Digital or programmed data processor

Examiners

Primary: Gruber, Felix D.

Attorney, Agent or Firm

Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Koch

International Classes

F02D 31/00 (20060101)
F02D 41/14 (20060101)
F02D 41/24 (20060101)
F02D 41/26 (20060101)
F02M 3/00 (20060101)
F02M 3/06 (20060101)
F02D 41/12 (20060101)
F02D 41/00 (20060101)

Foreign Application Priority Data

1977-12-01 JP

Abstract

An auxiliary air delivery system for an internal combustion engine includes an intake vacuum sensor for generating an intake vacuum signal, a deceleration sensor and a microcomputer in which is stored a set of data representing different values of reference intake vacuum and programmed to retrieve a datum as a function of the length of time from the occurrence of engine deceleration. The retrieved information is used a reference signal with which the intake vacuum signal is compared to provide a control signal. A servo mechanism is provided to allow auxiliary air to be admitted into the manifold at a point downstream of the nearly closed throttle in response to the control signal to reduce the difference between the actual intake vacuum and the reference intake vacuum.