Automatic control system for prime movers

• US 4,481,425 A
• Filed: 07/19/1982
• Issued: 11/06/1984
• Est. Priority Date: 07/22/1981
• Status: Expired due to Fees

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Ono, Makoto, Hori, Shinichi, Ohnishi, Yasuichi
• Primary Examiner(s): Dobeck, B.
• Assistant Examiner(s): Flower, Terry
• Application Number:
  US06/399,957
• Time in Patent Office: 841 Days
• Field of Search: 290/30 R, 290/30 A, 290/30 B, 290/34, 290/51, 290/1 E, 290/38 R, 290/37 R, 290/48, 290/DIG. 1-DIG. 11, 123/179 B, 364/424, 364/431.04, 364/431.11, 364/431.1, 364/431.09
• US Class Current: 290/51
• CPC Class Codes: B60K 28/00 Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions for electrically-propelled vehicles B60L3/00; road vehicle drive control systems for purposes not related to the control of a particular sub-unit B60W30/00; drive control systems specially adapted for autonomous road vehicles B60W60/00
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02N 11/0814 comprising means for controlling automatic idle-start-stop
• CPC Class Codes: F02N 11/10 Safety devices F02N11/08 takes precedence
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An automatic control system for such a prime mover as a vehicle engine is adapted to automatically stop the prime mover when such a driven device as a vehicle is arrested, to automatically drive the prime mover in response to operation of a starting mechanism for effecting start of the driven device, and to maintain the prime mover in its operative condition when the driven device is moving. The control system is arranged to be inoperative in an expected occurrence of an error in operation of a setting switch for the system and to indicate the operative condition of the system under normal control of the setting switch.

Claims

1. A control system for controlling the automatic stopping and restarting of a vehicle prime mover having a main switch associated therewith comprising:

user actuable setting means for providing a set signal for enabling automatic control; and

computer means, operable when said main switch is closed and responsiveto said set signal including (a) means for stopping said prime mover when said vehicle stops, (b) means for restarting said prime mover upon the occurrence of a predetermined condition, (c) means for maintaining the operation of said prime mover until the vehicle stops, (d) means for detecting whether said setting signal occurs after said main switch is closed and if so, performing the function of means (a)-(c) and if not, preventing theperformance of the functions of means (a)-(c).

2. A control system according to claim 1 wherein said computer means further comprises (e) means for generating an operation signal indicative of an enablement of the functions of means (a)-(c), said control system further comprising an indicator response to said operation signal for indicating to a user that said functions of means (a)-(c) are enabled.

3. A control system according to claim 1, further comprising door switch means cooperable with a vehicle door for generating a door signal when the vehicle door is opened, said ocomputer means further including means for preventing the performance of the functions of means (a)-(c) when said door signal is present.

4. A control system for controlling the operation of a vehicle prime mover having a starting control circuit which in its activated condition connects an electric power source to a starter of said vehicle and in its deactivated condition disconnects said starter from said power source, a drive control circuit which in its activated condition maintains the operative condition of said prime mover and in its deactivated condition automatically renders the prime mover inoperative, a main switch which in its actuated position connects said power source to said drive control circuit, and a mechanism for effecting movement of the vehicle, said control system comprising:

an electric control device for activating said starter control circuit in response to operation of said movement mechanism and for deactivating said starter control circuit inresponse to operation of the prime mover, said electric circuit control device further including means for maintaining said drive control circuit in its activated condition while the vehicle is moving and for deactivating said drive control circuit when the vehicle stops; and

setting means for generating a set signal;

said electric control device further including means for detecting whether said setting signal occurs after said main switch is actuated and if not, disabling said electric control device and means for generating a signal for indicating an operational condition of said drive control circuit and an indicator responsive to said indicating signal for indicating said condition to a user.

5. An automatic control system for controlling the operation of a vehicle prime mover having a main switch associated therewith, comprising:

a prime mover control element;

setting means for generating a setting signal;

detection means for detecting whether the setting signal occurs after a closure of said main switch;

maintenance means for maintaining operation said control element when said setting signal occurs after closure of said main switch; and

disabling means for disabling operation of said control element when said setting signal does not occur after closure of said main switch.