Engine start control system
AssigneeDenso Corporation
InventorRyohei TAKAHASHI
Life of this patent
Estimating the term…
Abstract
When a CPU for controlling an operation of a starter motor is reset due to a decrease of a power supply voltage during the operation of the starter motor, the CPU neglects a satisfaction of a starter stop condition for a predetermined period from a return of the CPU. The CPU changes the predetermined period for neglecting the starter stop condition, based on at least one of parameters, such as, the power supply voltage, an ambient temperature, a number of resets of the CPU during one cranking operation, and so on.
Claims6
An engine start control system comprising:
- a CPU for controlling ON-OFF operation of a starter motor to crank up an engine,
- wherein the CPU stops an operation of the starter motor when a starter stop condition is satisfied during the operation of the starter motor, while the CPU prohibits the operation of the starter motor when the starter stop condition is satisfied during non-operation of the starter motor, and
- wherein, when the CPU is reset during the operation of the starter motor, the CPU neglects satisfaction of the starter stop condition during a predetermined neglecting period from a return of the CPU.
An engine start control system comprising:
- a CPU for controlling ON-OFF operation of a starter motor to crank up an engine,
- wherein the CPU stops an operation of the starter motor when a starter stop condition is satisfied during the operation of the starter motor, while the CPU prohibits the operation of the starter motor when the starter stop condition is satisfied during non-operation of the starter motor, and
- wherein, when the CPU is reset during the operation of the starter motor, the CPU is initialized to a side in which the starter stop condition is not satisfied at a return of the CPU, and such an initialized condition is maintained for a predetermined period from the return of the CPU.
An engine start control system comprising:
- a CPU for controlling ON-OFF operation of a starter motor to crank up an engine;
- and
- a holding circuit for keeping a starter-ON condition for a predetermined period, when the CPU is reset during an operation of the starter motor,
- wherein, when the CPU returns from its reset condition, the CPU confirms an operational condition of the starter motor at the reset of the CPU,
- wherein, when the CPU confirms that the operational condition of the starter motor at the reset of the CPU was in the starter-ON condition, the CPU carries out an engine-start-up initialization process for an engine crank-up operation according to which the operational condition of the starter motor is maintained in the starter-ON condition, and
- wherein the CPU neglects satisfaction of a starter stop condition during a predetermined neglecting period from a return of the CPU.
Dependencies are inferred from the claim text.