Fuel heating control method and system

• US 6,501,050 B2
• Filed: 11/21/2001
• Issued: 12/31/2002
• Est. Priority Date: 11/22/2000
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hiraku, Keizo, Suzuki, Hideki, Koga, Nobuhiko
• Primary Examiner(s): Walberg, Teresa
• Assistant Examiner(s): Patel, Vinod D
• Application Number:
  US09/989,443
• Publication Number:
  US 20020060213A1
• Time in Patent Office: 405 Days
• Field of Search: 219/205, 219/202, 219/509, 219/270, 123/549, 123/594
• US Class Current: 219/205
• CPC Class Codes: F02D 2200/0606 Fuel temperature
• CPC Class Codes: F02M 31/125 Fuel
• CPC Class Codes: F02M 53/02 with fuel-heating means, e.g. for vaporising
• CPC Class Codes: F02M 53/06 with fuel-heating means, e.g. for vaporising
• CPC Class Codes: F02N 11/0848 with means for detecting successful engine start, e.g. to stop starter actuation
• CPC Class Codes: F02N 19/04 by heating of fluids used in engines
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A fuel heating control method and apparatus includes an operation of a heater heating a fuel for an engine started by being driven by a starting motor. The heater is not operated until after an operation of the starting motor is substantially terminated at a time of starting the engine.

Claims

1. A method of controlling an operation of a heater that heats a fuel in an engine started by a starting motor, comprising:

operating the heater after an operation of the starting motor is substantially terminated at a time of starting the engine.

2. The method according to claim 1, wherein the operation of the starting motor is substantially terminated at a time when a switch of a power circuit in the starting motor is opened.

3. The method according to claim 1, wherein the operation of the starting motor is substantially terminated at a time when the engine is first able to run on its own.

4. The method according to claim 3, wherein the engine is first able to run on its own in less than one second after driving of the engine is started by the starting motor.

5. The method according to claim 1, wherein a plurality of heaters with respect to all cylinders of the engine are separated into groups, and the operation of the heaters is started sequentially by each group upon substantial termination of the starting motor.

6. The method according to claim 1, wherein the operation of the starting motor is substantially terminated at a time when an engine revolution is equal to or greater than a predetermined threshold value.

7. The method according to claim 1, wherein when the engine is driven by the starting motor, an amount of electric current application supplied to the heater is restricted, an amount of electric current application supplied to the starting motor is increased as much as possible, and an engine drive revolution by the starting motor is increased as much as possible such that the engine is able to run on its own at an early stage.

8. The method according to claim 1, wherein when the engine is judged to be capable of running on its own at a time when self-running of the engine is progressed to a certain degree, the engine driving load applied to the starting motor is reduced and the operation of the starting motor is substantially terminated.

9. A fuel heating apparatus, comprising:

an engine;

a heater that heats a fuel in the engine;

a starting motor that starts the engine; and

a controller that operates the heater after an operation of the starting motor is substantially terminated at a time of starting the engine.

10. The apparatus according to claim 9, wherein the operation of the starting motor is substantially terminated by the controller at a time when a switch of a power circuit in the starting motor is opened.

11. The apparatus according to claim 9, wherein the operation of the starting motor is substantially terminated by the controller at a time when the engine is first able to run on its own.

12. The apparatus according to claim 11, wherein the engine is first able to run on its own in less than one second after driving of the engine is started by the starting motor.

13. The apparatus according to claim 9, wherein a plurality of heaters with respect to all cylinders of the engine are separated into groups, and the operation of the heaters is started by the controller sequentially by each group upon substantial termination of the starting motor.

14. The apparatus according to claim 9, wherein the operation of the starting motor is substantially terminated by the controller at a time when an engine revolution is equal to or greater than a predetermined threshold value.

15. The apparatus according to claim 9, wherein when the engine is driven by the starting motor, an amount of electric current application supplied to the heater is restricted, the amount of electric current application supplied to the starting motor is increased as much as possible, and an engine drive revolution by the starting motor is increased as much as possible such that the engine is able to run on its own at an early stage.

16. The apparatus according to claim 9, wherein when the engine is judged to be capable of running on its own by the controller at a time when self-running of the engine is progressed to a certain degree, the engine driving load applied to the starting motor is reduced and the operation of the starting motor is substantially terminated.