VEHICULAR AIR-POLLUTION PREVENTIVE APPARATUS

• US 3,779,349 A
• Filed: 09/12/1972
• Issued: 12/18/1973
• Est. Priority Date: 12/10/1971
• Status: Expired due to Term

• Current Assignee: Hiroyuki Maruoka
• Original Assignee: Hiroyuki Maruoka
• Inventors: Maruoka, Hiroyuki
• Primary Examiner(s): Herrmann, Allan D.
• Assistant Examiner(s): Chandler, Lance W.
• Application Number:
  US05/288,409
• Time in Patent Office: 462 Days
• Field of Search: 192/.092 123/179B,179BG
• US Class Current: 477/76
• CPC Class Codes: F02N 11/0818 Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
• CPC Class Codes: F02N 11/087 Details of the switching means in starting circuits, e.g. relays or electronic switches
• CPC Class Codes: F02N 2200/023 Engine temperature
• CPC Class Codes: F02N 2200/0802 Transmission state, e.g. gear ratio or neutral state
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

To prevent emission of toxic compounds from an automotive engine during idling as in the case where the motor vehicle is stopped at a crossing or on a jammed highway, an apparatus is provided which includes first switch means responsive to a temperature of the engine and second switch means responsive to an uncoupled condition of a power transmission system. These two switch means are connected to an ignition coil and de-energize the coil when the engine temperature is higher than a predetermined level and concurrently the transmission system is in an uncoupled condition.

Claims

1. A combination with an ignition system and a power transmission system of a motor vehicle, of first switch means responsive to an engine temperature and second switch means responsive to an uncoupled condition of the power transmission system, the first and second switch means being connected to a primary winding of an ignition coil of the ignition system for de-energizing the ignition coil when the engine temperature is higher than a predetermined temperature and concurrently the power transmission system is in an uncoupled condition.

2. A combination with an ignition system and a power transmission system of a motor vehicle, of first switch means responsive to an engine temperature, second switch means responsive to an uncoupled condition of the power transmission system, the first and second switch means being connected to a primary winding of an ignition coil of the ignition system for de-energizing the ignition coil when the engine temperature is higher than a predetermined level and concurrently the power transmission is in an uncoupled condition, and third switch means connected to the ignition coil and to a cranking motor for the engine and responsive to an engine revolution speed, said third switch means being closed to actuate the cranking motor when the engine revolution speed is lower than a predetermined relatively low level.

3. A combination with an ignition system and a power transmission system of a motor vehicle, of first switch means responsive to an engine temperature, second switCh means responsive to an uncoupled condition of the transmission system, the first and second switch means being connected to a primary winding of an ignition coil of the ignition system for energizing the ignition coil when the engine temperature is higher than a predetermined level and concurrently the power transmission system is in a coupled condition, and third switch means connected to said primary winding of the ignition coil and closed when an engine of the motor vehicle is being driven and yet said first and second switch means are open.

4. A combination with an ignition system and a power transmission system of a motor vehicle, of engine temperature responsive switch means opened in response to an engine temperature which is lower than a predetermined level, transmission gear responsive switch means closed in response to an uncoupled condition of the power transmission and normally closed slow-release switch means connected between an ignition switch and an ignition coil of the ignition system and serially to the engine temperature and transmission gear responsive switch means for energizing the ignition coil when at least either of the engine temperature and transmission gear responsive switch means is open, said slow-release switch means being opened at a retarded timing with both of said engine temperature and transmission gear responsive switch means are closed in response to an engine temperature higher than said predetermined level and to the uncoupled condition of the power transmission system.

5. A combination with an ignition system and a power transmission system of a motor vehicle, of engine temperature responsive switch means opened in response to an engine temperature which is lower than a predetermined level, transmission gear responsive switch means closed in response to an uncoupled condition of the power transmission system, normally-closed slow-release switch means connected between an ignition switch and an ignition coil of the ignition system and serially to the engine temperature and transmission gear responsive switch means for energizing the ignition coil when at least either of the engine temperature and transmission gear responsive switch means is open, said slow-release switch means being opened at a retarded timing when both of said engine temperature and transmission gear responsive switch means are closed in response to an engine temperature which is higher than said predetermined level and to the uncoupled condition of the power transmission system, and engine speed responsive switch means connected to the ignition coil and to a cranking motor for the engine and closed to energize the cranking motor in response to an engine speed which is lower than a predetermined relatively low level.

6. A combination with an ignition system and a power transmission system of a motor vehicle, of engine temperature responsive switch means closed in response to an engine temperature which is lower than a predetermined level, transmission gear responsive switch means closed in response to a coupled condition of the power transmission system, and vehicle speed responsive switch means closed in response to a vehicle speed which is lower than a relatively low predetermined level, said engine temperature, transmission gear and vehicle speed responsive switch means being connected in parallel between an ignition switch and an ignition coil of the ignition system for energizing the ignition coil when at least one of the three switch means is closed.

7. A combination as claimed in claim 6, further comprising second transmission gear responsive switch means serially connected to said engine temperature responsive switch means and open in response to the coupled condition of the power transmission system.

8. A combination with an ignition system and a power transmission system of a motor vehicle, of engine temperature responsive switch means closed in response to an engine temperature which is lower than a predetermined level, transMission gear responsive switch means closed in response to a coupled condition of the power transmission system, vehicle speed responsive switch means closed in response to a vehicle speed which is higher than a relatively low predetermined level, said engine temperature, transmission gear and vehicle speed responsive switch means being connected in parallel between an ignition switch and an ignition coil of the ignition system for energizing the ignition coil when at least one of the three parallel switch means is closed, and engine speed responsive switch means connected to the ignition coil and to a cranking motor for the engine, said engine speed responsive switch means being closed in response to an engine revolution speed which is lower than a predetermined relatively low level.

9. A combination as claimed in claim 8, further comprising second transmission gear responsive switch means serially connected to said engine temperature responsive switch means and open in response to the coupled condition of the power transmission system.

10. A combination with an ignition system and a power transmission system of a motor vehicle, of engine temperature responsive switch means closed in response to an engine temperature which is lower than a predetermined level, transmission gear responsive switch means closed in response to a coupled condition of the power transmission system, and accelerator position responsive switch means which is open in response to a condition in which an accelerator pedal is released, said engine temperature, transmission gear and accelerator position responsive switch means are connected in parallel between an ignition switch and an ignition coil of the ignition system for energizing the ignition coil when at least one of the three switch means is closed.

11. A combination as claimed in claim 10, further comprising clutch responsive switch means connected between said ignition switch and ignition coil and in parallel to said three switch means and closed in response to an uncoupled condition of a clutch of the power transmission system.

12. A combination with an ignition system and a power transmission system of a motor vehicle, of engine temperature responsive switch means closed in response to an engine temperature which is lower than a predetermined level, transmission gear responsive switch means closed in response to a coupled condition of the power transmission system, accelerator position responsive means which is open in response to a released condition of an accelerator pedal, said engine temperature, transmission gear and accelerator position responsive switch means being connected in parallel between an ignition switch and an ignition coil of this ignition system for energizing the ignition coil when at least one of these three switch means is closed, and engine speed responsive switch means connected to said ignition coil and to a cranking motor for the engine and closed in response to an engine speed which is lower than a relatively low level.

13. A combination as claimed in claim 12, further comprising clutch responsive switch means connected between said ignition switch and said ignition coil and in parallel to said three switch means and closed in response to an uncoupled condition of a clutch of the power transmission system.

14. A combination as claimed in claim 1, in which said level of the engine temperature ranges from about 60* C to about 70* C.

15. A combination as claimed in claim 2, in which said predetermined level of the engine revolution speed is about 500 r.p.m.

16. A combination as claimed in claim 4, in which said slow-release switch means is adapted to open at a timing retarded for about 1 second.