Intake system for internal combustion engines

Patent 4738233 Issued on April 19, 1988. Estimated Expiration Date:

February 24, 2006. 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

Supercharged internal combustion engine
Patent #: 4426985
Issued on: 01/24/1984
Inventor: Kanesaka

Homogenizing device for the intake mixture of an internal combustion engine
Patent #: 4473038
Issued on: 09/25/1984
Inventor: Lorenzo

Engine intake system
Patent #: 4554890
Issued on: 11/26/1985
Inventor: Okimoto , et al.

Inlet manifold Patent #: 4622931
Issued on: 11/18/1986
Inventor: Wickramasuriya

Inventors

Assignee

Mazda Motor Corporation

Application

No. 06/832409 filed on 02/24/1986

US Classes:

123/190.2, Single function, (i.e., exhaust and intake by separate tube)123/184.53, Manifold tuning, balancing or pressure regulating means123/403, Throttling (e.g., volume varying using throttle valve)123/405, By engine operated valve123/432Air or combustible mixture entering the combustion chamber through plural inlets

Examiners

Primary: Feinberg, Craig R.
Assistant: Okonsky, David A.

Attorney, Agent or Firm

Fleit, Jacobson, Cohn & Price

International Classes

F02B 27/00 (20060101)
F02B 29/00 (20060101)
F02B 29/08 (20060101)
F02D 13/02 (20060101)

Foreign Application Priority Data

1985-02-25 JP

Abstract

An engine intake system including an intake passage opening to the combustion chamber through an intake port having an intake valve. A control valve is provided in the intake valve for cyclically opening the intake passage. Upstream the control valve, the intake passage is provided with a tank which functions to reverse the negative pressure propagated from the control valve into a positive pressure which is then transmitted to the combustion chamber to increase the intake charge. A timing control mechanism is provided for retarding the opening timing of the control valve in a low speed, high load engine operation.