Cold HC emission controlling device for automobile equipped with catalyst type disposal system

• US 4,432,316 A
• Filed: 09/14/1981
• Issued: 02/21/1984
• Est. Priority Date: 07/10/1978
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ogita, Tamotsu
• Primary Examiner(s): Cox, Ronald B.
• Application Number:
  US06/302,051
• Time in Patent Office: 890 Days
• Field of Search: 123/DIG. 11, 123/328, 123/327, 123/407
• US Class Current: 123/328
• CPC Class Codes: F02M 3/062 by altering as a function of motor r.p.m. the throttle valve stop or the fuel conduit cross-section by means of pneumatic or hydraulic means external damping elements F02M19/122

Abstract

A HC emission controlling apparatus for use in an automobile is equipped with a catalytic type emission disposal converter (system) as an anti-pollution measure, having a deceleration emission controlling device such as a dash pot engageable with the throttle valve lever and connected to a vacuum control device. The apparatus includes a deceleration emission controlling device connected through a vacuum-transmitted valve to the vacuum controlling device, the vacuum controlling device being provided with a change-over valve which is adapted to be actuated by a temperature-sensitive actuating member. The change-over valve brings the vacuum-transmitted valve into communication with the atmosphere and with a vacuum source, respectively, before and after the warming up of the engine.

Claims

1. A cold HC emission controlling apparatus for use in an automobile equipped with a catalytic type disposal system, the apparatus comprising a deceleration emission control device having a delaying rod positioned to be moved into and out of engagement with a throttle valve lever in a carburetor of an engine of the automobile, a vacuum control device for operating said deceleration emission control device through a vacuum-transmitting valve;

whereby said vacuum-transmitting valve operates said decelerating emission control device;

said vacuum control device comprising a bimetal temperature sensitive actuating member and a change-over valve operatively connected to said bimetal member for moving from said vacuum transmitting valve from a position in which said vacuum control device is put in communication with a vacuum source to a position in which said vacuum control device is put in communication with the atmosphere both in said vacuum-transmitting valve, means to locate at least that portion of said vacuum transmitting valve housing said bimetal member directly in the coolant flow stream in the cooling water jacket of the engine, and a vacuum check valve positioned between said vacuum source and said vacuum-transmitting valve.

2. A cold HC emission controlling apparatus as claimed in claim 1, wherein said deceleration emission control device is constituted by a dash pot.

3. A cold HC emission controlling apparatus as claimed in claim 1, wherein said deceleration emission control device is constituted by a throttle positioner.

4. A cold HC emission controlling apparatus as claimed in claim 1, wherein said vacuum source is an intake manifold of the engine.

5. A cold HC emission controlling apparatus as claimed in claim 1, wherein said atmospheric side is communicated with via an air cleaner.